fusion-bonded epoxy coatings partl general

FUSION-BONDED EPOXY COATINGS

PARTl GENERAL

1.01 Summary

A. Work Included: Provide fusion-bonded epoxy coatings as shown on the drawings and as specified herein.

B. Related work specified elsewhere:

1. High-Build Epoxy Coatings.

2. Coating Systems for Pumping Plants.

C. Special requirements:

1. Fluidized bed method of application shall be used for shop coating of fabricated pipe.

2. Either electronstatic spray method or fluidized bed method of application may be used for shop coating of miscellaneous metal.

1.02 References

A. SSPC-SP 5, White Metal Blast Cleaning.

B. A WWA C213, Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines.

1.03 Submittals

A. Product data: Submit manufacturer's cunent specifications or technical information that proves compliance with the specified requirements.

B. Manufacturer's instructions: Submit manufacturer's written instructions and recommendations for field coating and repair of coating system.

Pump Coating Specification

1.04 Quality Assurance

A. Qualifications:

1. Applicator: Regularly engaged in application of similar coatings for at least two years immediately prior to this work.

2. Workers: Experienced and lmowledgeable in preparation for and application of fusion-bonded epoxy coatings.

PART 2 PRODUCTS

2.01 Materials

A. Coating: 100% solids, fusion bonded, themo-setting resin powder.

B. Approved products:

1. Electrostatic spray: Scotchkote No. 134, Minnesota Mining & Manufacturing Co.

2. Fluidized bed: Scotchkote No. 203 or No. 206N, Minnesota Mining & Manufacturing Co.

3. Or approval equal.

2.02 Approved Applicators

A. Ames Co., Inc. Woodland, CA, (916) 666-2493

B. Poly-Engineering, Richmond, CA, (510) 233-1420

C. Water Works Manufacturing Co., Marysville, CA, (916) 742-5171

D. APAC Coatings, Livermore, CA, (510) 447-2444


PART3 EXECUTION

3.01 Surface Preparation

A. Grind smooth all surface irregularities, welds, and weld spatter.

B. Grind smooth and round all sharp metal edges.

C. Abrasive blast surfaces to white metal in accordance with SSPC-SPS.

D. Surface anchor profile: 1.5 to 4.0 mils.

3.02 Coating Application

A. Preheating, coating application, and post-curing shall be in accordance with the coating manufacturer's instructions and A WW A C213.

B. Dry film thickness of cured coating shall be in 12 mils minimum.

C. Coating shall be free of holidays and pinholes.

D. Finished coating shall be well bonded and have no sags and runs.

3.03 Quality Control

A. Contra Costa Water District. may inspect surface preparation and application of coatings. Notify Contra Costa Water District not less than five working days before application of coating.

B. The finished coating shall be inspected and tested at the coating plant by the applicator for holidays and for coating thickness.

C. Thiclmess shall be measured with a non-destructive paint film thickness gauge such as Mikrotest.

D. As directed by the Engineer, test using either a low voltage wet sponge holiday detector or a high voltage holiday detector.

1. Low voltage wet sponge holiday detector shall be equal to K-D Bird Dog or Tinker-Rasor M-1. Add a non-sudsing wetting agent, such as Eastman Kodak Photo-Flo to the water used to saturate the sponge.


2. High voltage holiday detector shall be equal to Tinker-Rasor AP-W or D. E. Stearns Model 14/20. Use in accordance with coating manufacturers recommendations except use voltage of 150 volts per mil of coating.

E. The finished coating shall have the following physical properties:

1. Adhesion test: 3,000 psi when pulling apart two ½-inch diameter coated rods joined by coating, using an Instron testing machine.

2. Adhesion-shear test: 4,000 psi when pulling apart two coated panels with ½ square inch overlap and joined by coating, using an Instron testing machine.

F. Any work found deficient shall be repaired and brought to full compliance with these specifications. Retest after coating repairs.

3.04 Field Repair of Coatings

A. After installation of coated items, repair damaged shop-applied coatings and coat field welds with the coating manufacturer's recommended material.

B. Prior to coating, surfaces shall be cleaned and ground to white metal.

C. Apply one or two coats as required to obtain a dry film thickness of 12 mils minimum, using brush or spray.

D. Comply with recommendations of the coating manufacturer.

END OF SECTION


INSPECTION CRITERIA:

Fixed Ladders Extend at least 3 feet above the surface

20 ft+: ladder cage OR lad-saf climbing system 30 ft+: ladder cage AND lad-saf climbing system

Hatches

o Lad-saf system - where does cable stop? Can you stand on top of structure and

disconnect after climbing off the ladder?

Ease of opening & closing hatch lid or moving grating

Fall exposure (into tank) when opening & closing lid What type of work is occurring when opening hatch? (Water quality sampling, electrical

equipment maintenance, pulling mixer, etc)

Guardrails Guardrails required where there is a routine(> 4/yr.) need for any employee to

approach within 6 feet of the edge of the roof. When intermittent work is being done

safety belts and lanyards, or an approved fall protection system may used

Guardrails required at work locations> 30 in. above ground

o Vertical height 42 in. -45 in. from the upper surface of the top rail to the floor

o Mid rail must be approximately (+-linch) halfway between top rail and floor

o Toe boards are required when it could be potentially hazardous for an object to

fall from the edge

Scotchkote™ 134 Fusion Bonded Epoxy Coating

Product Description

3M'M Scotchkote•M 134 Fusion Bonded Epoxy Coating is a one~part, heat curable, thermosetting epoxy coating designed for coITosion protection of metal. The epoxy is applied to preheated steel as a dry powder which melts and cures to a uniform coating thickness. This bonding process provides excellent adhesion and coverage on applications such as valves, pumps, pipe drains, hydrants and porous castings. Scotchkote 134 coating is resistant to wastewater, co1Tosive soils, hydrocarbons, harsh chemicals, and sea water. Powder prope1iies allow easy manual or automatic application by electrostatic or air~spray equipment.

Product Features

No primer required. Particularly suitable for electrostatic or air-spray application on preheated metal a1ticles. Can be electrostatically applied to unhealed metal parts and subsequently cured by baking. Long gel time allows application on large or complex a1iicles, minimizing fear ofrnns, sags, laminations, or unsightly overspray. Especially usefol for coating the inside of pipe or other fabrications where a smooth, cmrosion resistant coating is required. Can be machined by grinding or cutting to meet close tolerance requirements. Allows easy visual inspection of coated articles. Can be painted with alkyd paint, acrylic lacquer, or acrylic enamel for color coding. Will not sag, cold flow, or become soft in storage. Long tenn storage under most climatic conditions. Lightweight for lmver shipping costs. Protects over wide tempera hire range. Resists direct burial soil stress. High adhesion nnd toughness. Resists cavitation and cathodic disbandment.

Excellent chemical resistnnce. Suitable for elevated temperahtre service in presence of H2S, CO2, CH4, crnde oil and brine when applied over phenolic primers. Long-terrn perfornrnnce history in water, sewc1ge, and other service environments. Scotchkote J 34 coating has been tested nnd ~S' certified to ANSI/NSF Standard 61, Drinking ~ Water System Components.

General Application Steps

I. Remove oil, grease and loosely adhering deposits. 2. Abrasive blast clean the surface to NACE No.2/SSPC-SP

10 near-white metal, 1S0 850 I-Sa2.5. 3. Apply mech,rnical masks or mask with Scotch"'Glass

Cloth Tape 361 or Scotch Aluminum Foil Tape 425 as required.

4. Preheat article to the desired application temperah1re per cure specifications.

5. Deposit Scotchkote 134 coating by pmvder spray to the specified thickness.

6. Cure according to cure specifications. 7. Visually and electrically inspect for coating flaws after

the coating has cooled. 8. Repair all defects.

Cure Specifications

Scotchkote 134 coating may be applied to metal articles which have been preheated to a temperatme of300°F/149°C to 450°F/232°C. After application, l 34 coating must be cured according to the cure guide to achieve maximum pe1fomrnnce properties.

1f 134 coating is electrostatically applied to unheated pa1ts, the cure time sho11ld be measmed from the time the coated part reaches the cure temperature. Afler cure, the coating may be force cooled using air or water to facilitate inspection and handling.

3M" Scotchkote"' 134 Fusion Bonded Epoxy Coating Cure Guide Temperature of Article at Time of Powder Application Typical Gel Time Cure Time

475'F/246'C 40 seconds 7 minutes




Typical Properties Property Color

Specific Gravity~ Powder (Air Pycnometer)

Coverage

Flutd Bed Density

Shelf Life at 80"F/27"C

Average Gel Time 400"F/204"C

Edge Coverage

Minimum Explosive Concentration

Ignition Temperature

Value

Forest Green

1.51

127 fF/lb/mil (0,66 ml/kg/mm)

33 ibs/fP (530 kg/ml)

18 months

120 seconds

12% to 18%

0.03 oz/fl3 (30,6 g/m1)

986"F/530"C

Ch emical/P ressu re/T em peratu re Resistance

All tests performed on Scotchkote•~ 134 Fusion Bonded Epoxy Coating applied over a I mil/25,4~1111 phenolic primer. Liquid phase for all test conditions: 33% kerosene, 33% toluene, 34% brine solution of 5% NaCl.

Test Conditions Autoclave, 120"F/49"C 48 hours, 1500 psi/10.3 MPa

Autoclave, 1 so~F/66~c 48 hours, 2200 psi/15.2 MPa

Autoclave, 2DD"F/93°C 24 hours, 3300 psi/22.8 MPa

Autoclave, 300"F/149°C 24 hours, 3000 psi/20.7 MPa

Gas Phase 99.5% CO2 0.5% HzS

80% CH4 12% CO2 8% H2S

86% CH4 8%CD2 6% H2S

90% CH 10% CO2 Trace HzS

Results Excellent adhesion, no coaling loss or blisters fn aqueous, hydrocarbon, or gas phase

Excellent adhesion, no coaling loss or blisters in aqueous, hydrocarbon, or gas phase

Excellent adhesion, no coating loss or blis(ers in aqueous, hydrocarbon, or gas phase

Excellent adhesion, no coating loss or blisters in aqueous, hydrocarbon, or gas phase

Chemical Resistance Exposure at 73°F/23°C* Acetic Acid up to 25%

Acetone (softened)

Aluminum Chloride

Aluminum Hydroxide

Aluminum Nitrate

Aluminum Sulfate

Ammonium Carbona!e

Ammonium Chloride

Ammonium Hydroxide up to 100%

Ammonium Nitrate

Ammonium Phosphate

Ammonium Sulfate

Amyl Alcohol

Barium Carbonate

Barium Chloride

Barium Hydroxide

Barium Nitrate

Barium Sulfate

Benzene

Boric Acid

Borax

Butyl Alcohol

Cadmium Chloride

Cadmium Nitrate

Cadmium Sulfate

Calcium Carbonate

Calcium Chloride

Calcium Hydroxide

Calcium Nitrate

Calclum Sulfate

Calcium Disulfide

Carbon Tetrachloride

Caustic Potash

Caustic Soda

Chlorine 2%

Citric Acid up to 25%

Copper Chloride

Copper Nilrale

Copper Sulfate

Crude Oil

Cycfohexane

Cyclohexene

Cyclopentane

Detergent

Diesel Fuel

Diet11ylene Glycol

Dipropy!ene Glycol

Ethanol (softened)

Elhylbenzene

Ethylene Glycol

Ferric Chloride up lo 50%

Ferric Nitrate

Ferric Sulfate

Ferrous Nitrate

Ferrous Sulfa!e

Formaldehyde up to 100%

Formic Acid up to 10%

Freon; gas and liquid

Gas (Mfg)

Gas (Natura!)

Gasoline Leaded

Gasoline Unleaded

Glycerine

Heptane

Hexane

Hexylene Glycol

Hydrochloric Add up to 25%

Hydronuoric Acid up to 40%

Hydrogen Sulfide

!sopropyt Alcohol

Jet Fuel

Kerosene

linseed Oil

Lubricating Oil

Magnesium Carbonate

Magnesium Chlor!de

Magnesium Hydroxide

Magnesium Nitrate

Magnesium Sulfate

MEK (softened)

Mercuric Chloride

Methanol (softened)

MJBK (Methyl lsobutyl Ketone)

Mineral Oil

Mineral Spirits

Molasses

Motor Oil

Muriatic Acid

Naphtha

Nickel Chloride

Nickel Nitrate

Nickel Sulfate

Nitric Acid up lo 30%

Nonane

Octane

Oxalic Acid

Pentane

Perchloroethylene

Phosphoric Acid up to 50%

Phosphorous Trichloride

Potassium Aluminum Sulfale

Potassium Bicarbonate

'Tests conducted for two years on similar products. No effect unless otherwise. stated.

Potassium Borate

Potassium Carbonate

Potassium Chloride

Potassium Dichromate up to 10%

Potassium Hydroxide

Potassium Nitrate

Potassium Sulfate

Propylene Glycol

Sewage

Silver Nitrate

Soap Solution

Soaps

Sodium Bicarbonate

Sodium Blsulfate

Sodium Carbonate

Sodium Chlorate

Sodium Chloride

Sodium Hydroxide

Sodium Meta Silicate up lo 5%

Sodium Nitrate

Sodium Sulfate

Sodium Thiosulfate up lo 5%

Stannic Chloride

Sulfur

Sulfuric Add up lo 60%

Synthetic Sea Fuel (60% Naphtha,

20% Toluene, 15% Xylene,

5% Benzene)

Synthel!c Silage

Tetra propylene

Toluene

Trichloroethylene

Trielhylene G!ycol

Trisodium Phosphate

Turpentine

Undecanol

Urea

Urine

Vinegar

Water

Chlorinated

Demineralized

Distilled

Sall

Sea

Xylol

Zinc Chloride

Zinc Nitrate

Zinc Sulfate

10-10-10 Fertilizer, Saturated

3M"' Scotchkote"' 134 Fusion Bonded Epoxy Coating Test Data - Coating Property Test Description Results Adhesion Elcometer > 3000 psi (glue failure) 21 0 kg/cm1

Adhesion to Steel (Shear) ASTM D 1002 10 mil/254 µm glue line

4300 psl/302 kg/cmi

Impact Gardner 5/8 in/1,6 cm diameter tu~ 1/8" x 3~ x 3" (0,32 cm x 7,6 cm x 7,6 cm) sfeel panel

160 fn-lbs 1,8 kg•m

Hardness Barco] ASTM D 2583 23

Abrasion Resistance ASTM D 4060 CS-17 10009 weighl/ 5000 cycles

0,07 gloss

Thermal Shock 310"F/154"C lo ·1 OO'F/-73'C 10 cycles, no effect 4" x 4" (10,2 cm x 10,2 cm) coated panel

Penetration ASTM G 17 0 -40'F/·40'C to 240"F/116'C

Tensile Strength ASTM D 2370 7300 psi/512 kg/cm" =--------------------------- ---·~----~ Elongation ASTM D 2370 4.2%

Compressive Strength ASTM D 695 12800 psi/900 kg/cm1

Coefficient of Friction APIRPSLZ-1968, App 8 23Q

Electric. Strength ASTM D 149 1000 volts/mil (39,4 kv/mm)

Hot Water Resistance 160°F/71 "C immersion/ 120 days Good adhesion, no bllstering

Electrical Resistivity ASTM D 257 1.2 x 10'$ ohm•cm

Thermal Conductivity MIL-l-16923E 7 x 10-' cal/sec/cm'/C"/cm

Water Absorption 3M 10 mi!/254 µm free film 30 days 6,5 g/m1

Fungus Resistance MIL-STD 810-8 Method 508 Funginert

Salt Fog MIL-E-5272C No effecl

Weatherometer ASTM G 23 5000 hours Surface chalk Soil Stress - 13urlal Bureau of Reclamation 25 cycles No effect

Salt Crock 30 day, 5 volt, 5% NaCl sand crock 230'F/110'C

Disbandment diameter 24 mm average

Bend ability 3/8"/9,5 mm coupon mandrel bend at 73°F/23~c

30 pipe diameters 1.9° / diameter length

Handling and Safety Precautions

Read all Health Hazard, Precautionary, nnd First Aid statements found in the Materinl Safety Data Sheet, and/or product label of chemicals prior to handling or use.

Important Notice

All statements, technical information, and recommendations related to Seller's products are based on information believed to be reliable, bul lhe accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability of the product for its intended use. The user assumes all risks and l!ability whatsoever in connection with such use.

Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect unless contained In an agreement signed by an authorized officer of Seiter. The statements contained herein are made in lieu of

3M Corrosion Protection Department

6801 River Place Blvd, Austin, TX 78726-9000 http://www.3M.com/corrosion

For ordering information, technical infomrntion, product inforn1ation or to request a copy of the Material Safety Data Sheet: phone: 1-800-722-6721 or 1-512-984-1038

fax: 1-800-828-9329 or 1-512-984-22 I 0

all warranties, expressed or implied, including but not limited lo the implied warranties of merchanlability and fitness for a particular purpose which warranties are hereby expressly disclaimed.

SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS.

40% Pre-consumer waste paper 10% Past-consumer waste paper

Lilho in USA. © 3M 1999 80·6111·0963-0

E '

't'Je . . . - . ·•·.·······• , , NO:PRODUCOON,WILL START UNTIL APPROVED IN WRITING,

lZJ FOR CONSTRUCTION PRODUCTION HAS STARTED, ANY CHANGES MAY AFFECT PRICE AND DEUVER'I'.

OUR0RDERNo: ~7~2'3~0 __

CUST. PO: 700HP PUMP

SY:&_ DATE: JQ/16/12

HEAD BASE PLATE HEX NUf & WASHER

NON-SHRINK ~LIE.iLA:'.:J GRou1~"-~s 1

COATING:

ffiPLANVIEW

•

,,. .. 6" X 3/4" " s11FFEmR 1

RING LJ.\.

All interior and exterior surfaces of the pump will be sandblasted per SS PCSP-10. Scotchkote 134 !color: Forest Green) in 12-16 mi: DFT will be applied.

TESTING: H~drostatic testing: T ei bowls and discharge heads will be non-witness hydroslotically Jested in accordance with Hydraulic Institute Standards.

Performance testing: Pumps will be non-witness tested as bowl assemblies with the colibroted lab drivers in accordance with Hydrauliclnstilute Standards.

DISCHARGE HEAD: FAB STl:El CL JO CAST RON~

--------SEAL HSG; WBGHTS

MECH SEAl: JC 5610 MOTOR. '"" SOlf PLATI:; STEEL osCH-HEAD: '"" BARREL: SOLEPLATE. 600 COLUMN PIPE: FABHER BARR8.:

BEAR.NG RETAINER; 644 BRZ COLUMN ASSY: 1940

BEARING fUNESHA __ : "" !!OWL ASSY: '"" TOP UNI: SHAFT: 17•_4PH !~IAL:j_~

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i;a:imOII e1q11 UJ(UJJOC

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do,2.001 \

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OPENING

-THIS L ,WlNG IS F;:;;w;;"JJJiij

fRLSNO, CAUFOm1.1, EL 141.25 (MAX) CERTIFIED r,;;JFOR APPROVAL

NO PRO(}UCTIO"I \SIU.. STNlT UNTIL APP/10\l'ID lH WillTING

QFOR CONSTRUCTION PRODUtTion llA'i STNlf!:O

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BY: AVf DATE:.....Q!fl.!fil_

"a VERTICAL ,J,~~!1.NE PUMP .I~r-,---,__l_

APPROX. \l'i)GHT f MOTOR 11500 DISCH, HD, J500 COL ASSY. 2200 !lO\\t ASSY. 55()0

TOTAL WT. 22700

T __ J

~'761 \Y~ ---~-- NOZZLE GROOVE DETAIL (VICTAULIC)

• ,. [!I;:TIJcow,.A)ff • PUMP NAMEPLATE

SPECIAL FEA TLRES: 1. 17-4 PH ol\oJllrig 2. l16 S.S- b<>lllng. J. 0-rlng bo"1o ond cot,.,rr.11 4. Ooublo koyed impelleto. 5. 0}'lcm!o holonccd lmpoll..-o. 6, Impeller• lined with tuolon bnr,dod •p><y. 7. Koy<>d !ino,t,oll coupl"lgt (17-4 f>lj) B. Pion U b)'l)cU "1 S.S. tubing <111d fiUin9,

~- nomoplotc~.

),~0~7;1}\~.~-honlccl oeo\

COATING: Oio<horge heod ,mlef"oY,,-, column pipe 10 ond 00, ond bo"l o,sembly ""ler<or ore lo bo ~ho\ Moolcd ond oloonod pot SSPC-SP-S S~olch~olo 1J4 luion bonded epo•r ~ill ho oppliod Inn ml,tlm"m OTT !o\aj \h\dne'3 ol 12 ml!.

Too hood o,terkor I• to b• b'o•l•d on<l cl•onod por SSPC-SP-10 CorboliM Cmboquord 690 e;,o•y .. 111 bo oppl;od lo lwo 6-7 mll cool• for " fool dry r.,m lh'cl<no•o of 12-14 mils. Color ,. Gray

TESTING: Hydro,to\lc tooling: Tho llo"I&. ond dbcliorgs hood witl bo hydm•lo\k:olly \o•!od ,n occordonoo wl\h H)odroullc ln,Uluto sl<>ndord, ond •pocmcollon9 pO"l~toph 1)2\\-J,1,4.B 1.4.

Petformonot1 lo,tln~: Bowl ""'•mbly w~J bo \oolod ot reduced ,pood ><llh o col;b,o\od \o,t lob d,1,or In otcorrl.,nco ~ilh Hydroul;c lmlilule Slondordo, AHS!/A'/NIA E.101, ond >podfico[(on poragroph 11211-J.1.4.B.1.

MOTOR MAKE a: DISCH. NOZZLE

W.:TAUUC STYLE •• -1<i'...._

{ •• CUST 10 CONRRI.I S'fru)

ENCLOSURE_,~~!_ __ _ TT'PE ..m......_ SRC _1Q__ HP .}~-- RPM .l!!I.!!....... PHASE_,_ HERTZ .!2_ VOLTAGE ~•ill'~'----

NON-SHRINK CROUT HEAD BASE PLATE:

PUMPAGE rum,-'""'-----SPEC. GRAVl1Y' O•S·•~--VISCO~ 1Y _JJl..15\. ____ _ TEMPERAlURE ',l'ilJf"I PH --

PUMP ~ •rn• OlSCH HEAO. ....l,!L.UNE SHAfT_m_c()t. ~ SHATT TUBE PROO.lUBE .'fY.._ OIL LUBE.®TYPE --1.lE!.\lL_ STACES...i_ ___llll2!l. GPM...llLBO\li\. UO 11,!PELlER o,c,_o=

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MATERIALS COL PIPE ~l-oR ~ sn. (.l7~\\') LINE SHAFT t7-• !'It DISCH. HEAD n11 ~"-KEYED LS CPLO ~ !l0\11,. SKATT \7-• PH SHAFT SEAL ..:>ilH CIIAIIC ~Ill SotrPLATE ASrnCfl7"STI. BRG.RE1AIN£R f/,11, Sll.-PUMP llOI\I.. A•S-a. JD '" IMPEU.tR AU§-OS] n•z BEARINGS{l..-..J a~-9ll naz BEARINGS '1M"""I ~ SlfllllNER l10 s.s BOWL W/R o,o~-;,. BRZ

IMPEll.ER W/P um-Pa ""'

ANCHOR BOLT DETAIL .$UPP l I ED BY .QI.!ifJ§

NOTES: 1, All. DIMENSIONS IN INCHES 2. ORA\\\NG SCAl.E = 1,Js J. DO NOT SCALE Ull!0/01\'N DIMENSIONS

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PROJl'.Cl HO. m6951 4. NOT 10 BE USED Fo.1 CDNS1RUCTIO:l UNLESS CEflllflED WSlUMERdlTY 0, VAI.U:.0

WAml 111\\SlON SS!> SANTA ,;u.a~ si: "" " "" OESCAIPTIOH VAfl.£)(), o. ~•s~o

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OUTLINE DRAWING

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5006201COD

INTERNATIONAi.! THE CORROSION SOCIETY

Item No. 21065

Joint Surface Preparation Standard

NACE No. 1/SSPC~SP 5 White Metal Blast Cleaning

This NACE International (NACE)/SSPC: The Society for Protective Coatings standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. It is intended to aid the manufacturer, the consumer, and the general public. Its acceptance does not in any respect preclude anyone, whether he has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not addressed in this standard. Nothing contained in this NACE/SSPC standard is to be construed as granting any right, by implication or otheiwise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents current technology and should in no way be interpreted as a restriction on the use of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NACE and SSPC assume no responsibility for the interpretation or use of this standard by other parties and accept responsibility for only those official interpretations issued by NACE or SSPC in accordance with their governing procedures and policies which preclude the issuance of interpretations by individual volunteers.

Users of this NACE/SSPC standard are responsible for reviewing appropriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE/SSPC standard may not necessarily address all potential health and safety problems or environmental hazards associated with the use of materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE/SSPC standard are also responsible for establishing appropriate health, safety, and environmental protection practices, in consultation with appropriate regulatory authorities if necessary, to achieve compliance with any existing applicable regulatory requirements prior to the use of this standard.

CAUTIONARY NOTICE: NACE/SSPC standards are subject to periodic review, and may be revised or withdrawn at any time without prior notice. The user is cautioned to obtain the latest edition. NACE and SSPC require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication.

Reaffirmed 1999-09-07 Approved October 1994

ISBN 1-57590-107-2 ©2000, SSPC: The Society for Protective Coatings

NACE International P.O. Box 218340

Houston, TX 77218-8340 (telephone +1 281/228-6200)

SSPC: The Society for Protective Coatings 40 24th Street, Sixth Floor

Pittsburgh, PA 15222 (telephone +1 412/281-2331)

Printed by NACE International

NACE No. 1/SSPC-SP 5

Foreword

This joint standard covers the use of blast cleaning abrasives to achieve a defined degree of cleaning of steel surfaces prior to the application of a protective coating or lining system. This standard is intended for use by coating or lining specifiers, applicators, inspectors, or others who may be responsible for defining a standard degree of surface cleanliness.

The focus of this standard is white metal blast cleaning. Near-white metal blast cleaning, commercial blast cleaning, industrial blast cleaning, and brush-off blast cleaning are addressed in separate standards.

White metal blast cleaning ~rovides a greater degree of cleaning than near-white metal blast cleaning (NACE No. 2/SSPC-SP 10 1\

The difference between a white metal blast and a near-white metal blast is that a white metal blast removes all of the coating, mill scale, rust, oxides, corrosion products, and other foreign matter from the surface. Near-white metal blasting allows light shadows, slight streaks, or minor discolorations caused by stains of rust, stains of mill scale, or stains of previously applied coating to remain on no more than 5 percent of each unit area of surface as defined in Paragraph 2.6 of NACE No. 2/SSPCSP 10.

This joint standard was originally prepared in 1994 and reaffirmed in 2000 by the SSPCINACE Task Group A on Surface Preparation by Abrasive Blast Cleaning. This joint Task Group includes members of both the SSPC Surface Preparation Committee and the NACE Unit Committee T-6G on Surface Preparation.

t1> NACE No. 2/SSPC-SP 10 (latest revision), "Near-White Metal Blast Cleaning" (Houston, TX: NACE, and Pittsburgh, PA: SSPC).

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Joint Surface Preparation Standard

NACE No. 1/SSPC-SP 5 White Metal Blast Cleaning

Contents

1. General ................................................................................................................... 1 2. Definition ................................................................................................................. 1 3. References .............................................................................................................. 1 4. Procedures Before Blast Cleaning ............................................................................ 1 5. Blast Cleaning Methods and Operation .................................................................... 2 6. Blast Cleaning Abrasives ......................................................................................... 2 7. Procedures Following Blast Cleaning and Immediately Prior to Coating .................... 2 8. Inspection ................................................................................................................ 3 9. Safety and Environmental Requirements .................................................................. 3 10. Comments ............................................................................................................... 3 Appendix A: Explanatory Notes ..................................................................................... 3

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Section 1: General

1.1 This joint standard covers the requirements for white metal blast cleaning of unpainted or painted steel surfaces by the use of abrasives. These requirements include the end condition of the surface and materials and procedures necessary to achieve and verify the end condition.

1.2 The mandatory requirements are described in Sections 1 to 9. NOTE: Section 10, "Comments," and Appendix A, "Explanatory Notes," are not mandatory requirements of this standard.

Section 2: Definition

2.1 A white metal blast cleaned surface, when viewed without magnification, shall be free of all visible oil, grease, dust, dirt, mm scale, rust, coating, oxides, corrosion products, and other foreign matter.

2.2 Acceptable variations in appearance that do not affect surface cleanliness as defined in Paragraph 2.1 include variations caused by type of steel, original surface condition, thickness of the steel, weld metal, mill or fabrication marks, heat treating, heat-affected zones, blasting abrasives, and differences because of blasting technique.

2.3 When a coating is specified, the surface shall be roughened to a degree suitable for the specified coating system.

2.4 Immediately prior to coating application, the entire surface shall comply with the degree of cleaning specified herein.

2.5 SSPC-VIS 1('I may be specified to supplement the written definition. In any dispute, the written standards shall take precedence over visual standards and comparators. Additional information on visual standards and comparators is available in Paragraph A4 of Appendix A.

Section 3: References

3.1 The documents referenced in this standard are listed in Paragraph 3.4.

3.2 The latest issue, revision, or amendment of the referenced standards in effect on the date of invitation to bid shall govern unless otherwise specified.

3.3 If there is a conflict between the requirements of any of the cited reference standards and this standard, the requirements of this standard shall prevail.

3.4 SSPC: The Society for Protective Coatings Standards:

AB 1 AB2

AB3

PA3 SP 1 VIS 1-89

Mineral and Slag Abrasives Cleanliness of Recycled Ferrous Metallic Abrasives Newly Manufactured or Re-Manufactured Steel Abrasives A Guide to Safety in Paint Applications Solvent Cleaning Visual Standard for Abrasive Blast Cleaned Steel

Section 4: Procedures Before Blast Cleaning

4.1 Before blast cleaning, visible deposits of oil, grease, or other contaminants shall be removed in accordance with SSPC-SP 1 ('I or other agreed-upon methods.

4.2 Before blast cleaning, surface imperfections such as sharp fins, sharp edges, weld spatter, or burning slag should be removed from the surface to the extent required by the procurement documents (project specification).

Additional information on surface imperfections is available in Paragraph A5 of Appendix A.

4.3 If a visual standard or comparator is specified to supplement the written standard, the condition of the steel prior to blast cleaning should be determined before the blasting commences. Additional information on visual standards and comparators is available in Paragraph A4 of Appendix A.

(2> SSPC-VIS 1 (latest revision), "Visual Standard for Abrasive Blast Cleaning Steel" (Pittsburgh, PA: SSPC).

(3> SSPC-SP 1 (latest revision), "Solvent Cleaning" (Pittsburgh, PA: SSPC).

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Section 5: Blast Cleaning Methods and Operation

5.1 Clean, dry compressed air shall be used for nozzle blasting. Moisture separators, oil separators, traps, or other equipment may be necessary to achieve this requirement.

5.2 Any of the following methods of surface preparation may be used to achieve a white metal abrasive blast cleaned surface:

5.2.1 Dry abrasive blasting using compressed air, blast nozzles, and abrasive.

5.2.2 Dry abrasive blasting using a closed-cycle, recirculating abrasive system with compressed air, blast nozzle, and abrasive, with or without vacuum for dust and abrasive recovery.

5.2.3 Dry abrasive blasting using a closed-cycle, recirculating abrasive system with centrifugal wheels and abrasive.

5.3 Other methods of surface preparation (such as wet abrasive blasting) may be used to achieve a white metal blast cleaned surface by mutual agreement between those responsible for performing the work and those responsible for establishing the requirements. NOTE: Information on the use of inhibitors to prevent the formation of rust immediately after wet blast cleaning is contained in Paragraph A9 of Appendix A.

Section 6: Blast Cleaning Abrasives

6.1 The selection of abrasive size and type shall be based on the type, grade, and surface condition of the steel to be cleaned, the type of blast cleaning system employed, the finished surface to be produced (cleanliness and roughness), and whether the abrasive will be recycled.

6.2 The cleanliness and size of recycled abrasives shall be maintained to ensure compliance with this standard.

6.3 The blast cleaning abrasive shall be dry and free of oil, grease, and other contaminants as determined by the test methods found in SSPC-AB 1 _14l AB 2_15l and AB 3. 1'l It

should be noted that even though SSPC-AB 1 addresses only mineral and slag abrasives, the tests are applicable to most abrasives.

6.4 Any limitations on the use of specific abrasives, the quantity of contaminants, or the degree of allowable embedment shall be included in the procurement documents (project specification) covering the work, because abrasive embedment and abrasives containing contaminants may not be acceptable for some service requirements. NOTE: Additional information on abrasive selection is provided in Paragraph A2 of Appendix A.

Section 7: Procedures Following Blast Cleaning and Immediately Prior to Coating

7.1 Visible deposits of oil, grease, or other contaminants shall be removed according to SSPC-SP 1 or another method agreed upon by those parties responsible for establishing the requirements and those responsible for performing the work.

7.2 Dust and loose residues shall be removed from prepared surfaces by brushing, blowing off with clean dry air, vacuum cleaning, or other methods agreed upon by those responsible for establishing the requirements and those responsible for performing the work. NOTE: The presence of toxic metals in the abrasives or paint being removed may place restrictions on the methods of cleaning permitted. The chosen method shall comply with all

applicable regulations. Moisture separators, oil separators, traps, or other equipment may be necessary to achieve clean, dry air.

7.3 After blast cleaning, any remaining surface imperfections (e.g., sharp fins, sharp edges, weld spatter, burning slag, scabs, slivers, etc.) shall be removed to the extent required by the procurement documents (project specification). Any damage to the surface profile resulting from the removal of surface imperfections shall be corrected to meet the requirements of Paragraph 2.4. NOTE Additional information on surface imperfections is contained in Paragraph A5 of Appendix A

<4J SSPC-AB 1 (latest revision), "Mineral and Slag Abrasives" (Pittsburgh, PA: SSPC). <5l SSPC-AB 2 (latest revision), "Specification for Cleanliness of Recycled Ferrous Metallic Abrasives" (Pittsburgh, PA: SSPC). <5l SSPC-AB 3 (latest revision), "Newly Manufactured or Re-Manufactured Steel Abrasives" (Pittsburgh, PA: SSPC).

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7.4 To meet the requirements of this standard, any visible rust that forms on the surface of the steel after blast cleaning shall be removed by recleaning the rusted areas


before coating. NOTE: Information on rust-back (rerusting) and surface condensation is contained in Paragraphs A6, A7, and AS of Appendix A.

Section 8: Inspection

8.1 Work and materials supplied under this standard are subject to inspection by a representative of those responsible for establishing the requirements. Materials and work areas shall be accessible to the inspector. The procedures and times of inspection shall be as agreed upon by those responsible for establishing the requirements and those responsible for performing the work.

8.2 Conditions not complying with this standard shall be corrected. In the case of a dispute, an arbitration or

settlement procedure established in the procurement · documents (project specification) shall be followed. If no arbitration or settlement procedure is established, a procedure mutually agreeable to purchaser and supplier shall be used.

8.3 The procurement documents (project specification) should establish the responsibility for inspection and for any required affidavit certifying compliance with the specification.

Section 9: Safety and Environmental Requirements

9.1 Because abrasive blast cleaning is a hazardous operation, all work shall be conducted in compliance with applicable occupational and environmental health and

safety rules and regulations. NOTE: SSPC-PA 3171

addresses safety concerns for coating work.

Section 10: Comments

10.1 Additional information and data relative to this standard are contained in Appendix A. Detailed information and data are presented in a separate document, SSPC-SP COM,<81

"Surface Preparation Commentary." The recommendations contained in Appendix A and SSPC-SP COM are believed to represent good practice, but are not to be considered requirements of the standard. The sections of SSPC-SP COM that discuss subjects related to industrial blast cleaning are listed below.

Subject

Abrasive Selection Film Thickness Wet Abrasive Blast Cleaning Maintenance Repainting Rust-Back (Re-rusting) Surface Profile Visual Standards Weld Spatter

Commentary Section

6 10 8.2 4.2 8.3 6.2 11

4.4.1

Appendix A: Explanatory Notes

A1 FUNCTION: White metal blast cleaning (NACE No. 1/SSPC-SP si'I) provides the greatest degree of cleaning. It should be used when the highest degree of blast cleaning is required. The primary functions of blast cleaning before coating are (a) to remove material from the surface that can cause early failure of the coating system and (b) to obtain a suitable surface roughness and to enhance the adhesion of the new coating system. The hierarchy of blasting

standards is as follows: white metal blast cleaning, nearwhite metal blast cleaning, commercial blast cleaning, industrial blast cleaning, and brush-off blast cleaning.

A2 ABRASIVE SELECTION: Types of metallic and nonmetallic abrasives are discussed in SSPC-SP COM. It is important to recognize that blasting abrasives may become embedded in, or leave residues on, the surface of

<7l SSPC-PA 3 (latest revision), "Guide to Safety in Paint Application" (Pittsburgh, PA: SSPC). <BJ SSPC-SP COM (latest revision), "Surface Preparation Specifications Surface Preparation Commentary" (Pittsburgh, PA; SSPC). <9l NACE No. 1/SSPC-SP 5 (latest revision), "Joint Surface Preparation Standard White Metal Blast Cleaning" (Houston, TX: NACE, and Pittsburgh, PA: SSPC}.



the steel during preparation. While such embedment or residues are normally not detrimental, care should be taken to ensure that the abrasive is free from detrimental amounts of water-soluble, solvent-soluble, acid-soluble, or other soluble contaminants (particularly if the prepared steel is to be used in an immersion environment). Criteria for selecting and evaluating abrasives are given in SSPC-AB 1, SSPC-AB 2, and SSPC-AB 3.

A3 SURFACE PROFILE: Surface profile is the roughness of the surface that results from abrasive blast cleaning. The profile depth (or height) is dependent on the size, shape, type, and hardness of the abrasive, particle velocity and angle of impact, hardness of the surface, amount of recycling, and the proper maintenance of working mixtures of grit and/or shot.

The allowable minimum/maximum height of profile is usually dependent on the thickness of the coating to be applied. Large particle-sized abrasives (particularly metallic) can produce a profile that may be too deep to be adequately covered by a single thin-film coat. Accordingly, it is recommended that the use of larger abrasives be avoided in these cases. However, larger abrasives may be needed for thick-film coatings or to facilitate removal of thick coatings, heavy mill scale, or rust. If control of profile (minimum/maximum) is deemed to be significant to coating performance, it should be addressed in the procurement documents (project specification). Typical maximum profile heights achieved with commercial abrasive media are shown in Table 8 of SSPC-SP COM. Surface profile should be measured in accordance with NACE Standard RP0287, 1101 "Field Measurement of Surface Profile of Abrasive Blast Cleaned Steel Surfaces Using Replica Tape," or ASTM1111 D 4417/121 "Test Method for Field Measurement of Surface Profile of Blast Cleaned Steel."

A4 VISUAL STANDARDS: Note that the use of visual standards or comparators in conjunction with this standard is required only when specified in the procurement document (project specification) covering the work. However, it is strongly recommended that the procurement document require the use of visual standards or comparators. SSPC-Vis 1-89 provides color photographs for the various grades of surface preparation as a function of the initial condition of the steel. The series A-SP 5, B-SP 5, C-SP 5, and D-SP 5 depicts surfaces cleaned to white metal grade. In addition, the series A-SP 5 Mand N depicts

surfaces cleaned by various metallic and nonmetallic abrasives to SP 5 condition. The NACE "Visual Com~arator for Surface Finishing of Welds Prior to Coating"11 1 is a plastic weld replica that complements NACE Standard RP0178,l1 41 "Fabrication Details, Surface Finish Requirements, and Proper Design Considerations for Tanks and Vessels to Be Lined for Immersion Service." Other available visual standards are described in Section 7 of SSPC-SP COM.

A5 SURFACE IMPERFECTIONS: Surface imperfections can cause premature failure when the service is severe. Coatings tend to pull away from sharp edges and projections, leaving little or no coating to protect the underlying steel. Other features that are difficult to properly cover and protect include crevices, weld porosities, laminations, etc. The high cost of the methods to remedy surface imperfections requires weighing the benefits of edge rounding, weld spatter removal, etc., against the costs of a potential coating failure.

Poorly adhering contaminants, such as weld slag residues, loose weld spatter, and some minor surface laminations may be removed during the blast cleaning operation. Other surface defects (steel laminations, weld porosities, or deep corrosion pits) may not be evident until the surface preparation has been completed. Proper planning for such surface repair work is essential because the timing of the repairs may occur before, during, or after the blast cleaning operation. Section 4 of SSPC-SP COM and NACE Standard RP0178 contain additional information on surface imperfections.

A6 CHEMICAL CONTAMINATION: Steel contaminated with soluble salts (e.g., chlorides and sulfates) develops rust-back rapidly at intermediate and high levels of humidity. These soluble salts can be present on the steel surface prior to blast cleaning as a result of atmospheric contamination. In addition, contaminants can be deposited on the steel surface during blast cleaning if the abrasive is contaminated. Therefore, rust-back can be minimized by removing these salts from the steel surface and eliminating sources of recontamination during and after blast cleaning. Wet methods of removal are described in NACE No. 5/SSPC-SP 12, 1151 "Surface Preparation of Steel and Other Hard Materials by High- and Ultrahigh-Pressure Water Jetting Prior to Recoating." Identification of the

(lOJ NACE Standard RP0287 (latest revision), "Field Measurement of Surface Profile of Abrasive Blast Cleaned Steel Surface Using a Replica Tape" {Houston, TX: NACE). (111 ASTM, 100 Barr Harbor Drive, Conshohocken, PA 19428-2959. (121 ASTM D 4417 (latest revision), "Standard Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel" (West Conshohocken, PA: ASTM). (i

3J "Visual Comparator for Surface Finishing of Welds Prior to Coating," Visual Aid for Use with NACE Standard RP0178 (latest revision), {Houston, TX: NACE). (l 4J NACE Standard RP0178 (latest revision), "Fabrication Details, Surface Finish Requirements, and Proper Design Considerations for Tanks and Vessels to Be Lined for Immersion Service" {Houston, TX: NACE). (l

5J NACE No. 5/SSPC-SP 12 {latest revision), "Surface Preparation of Steel and Other Hard Materials by High- and Ultrahigh-Pressure Water Jetting Prior to Recoating" (Houston, TX: NACE, and Pittsburgh, PA: SSPC).

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contaminants along with their concentrations may be obtained from laboratory and field tests as described in SSPC-TU 4, 11 'l 'Technology Update on Field Methods for Retrieval and Analysis of Soluble Salts on Substrates."

A7 RUST-BACK: Rust-back occurs when freshly cleaned steel is exposed to moisture, contamination, or a corrosive atmosphere. The time interval between blast cleaning and rust-back varies greatly from one environment to another. Under mild ambient conditions, if chemical contamination is not present (see Paragraph A6), it is best to blast clean and coat a surface on the same day. Severe conditions may require a more expedient coating application to avoid contamination from fallout. Chemical ccntamination should be removed prior to ccating (see Paragraph A6).

AB DEW POINT: Moisture condenses on any surface that is cclder than the dew point of the surrounding air. It is, therefore, recommended that the temperature of the steel surface be at least 3"C (5"F) above the dew point during dry blast cleaning operations. It is advisable to visually inspect for moisture and periodically check the surface temperature and dew point during blast cleaning operations and to avoid the application of coating over a damp surface.

A9 WET ABRASIVE BLAST CLEANING: Steel that is wet abrasive blast cleaned may rust rapidly. Clean water should be used for rinsing. It may be necessary to add inhibitors to the water or apply them to the surface immediately after blast cleaning to temporarily prevent rust foITT1ation. The use of inhibitors or the application of coating

NACE No. 1/SSPC·SP 5

over slight discoloration should be in acccrdance with the requirements of the coating manufacturer. CAUTION: Some inhibitive treatments may interfere with the performance of certain coating systems.

A10 FILM THICKNESS: It is essential that ample coating be applied after blast cleaning to adequately cover the peaks of the surface profile. The dry-film thickness of the coating above the peaks of the profile should equal the thickness known to be needed for the desired protection. If the dry-film thickness over the peaks is inadequate, premature rust-through or failure will occur. To assure that coating thicknesses are properly measured the procedures in SSPC-PA 2,117l "Measurement of Dry Coating Thickness with Magnetic Gauges" should be used.

A11 MAINTENANCE AND REPAIR PAINTING: When this standard is used in maintenance painting, specific instructions should be provided on the extent of surface to be blast cleaned or spot blast cleaned to this degree of cleanliness. In these cases, the cleaning shall be performed across the entire specified area. For example, if all weld seams are to be cleaned in a maintenance operation, this degree of cleaning shall be applied 100% to all weld seams. If the entire structure is to be prepared, this degree of cleaning shall be applied to 100% of the entire structure. SSPC-PA 4,118 "Guide to Maintenance Repainting with Oil Base or Alkyd Painting Systems," provides a description of accepted practices for retaining old sound coating, removing unsound coating, feathering, and spot cleaning.

(JGJ SSPC-TU 4 (latest revis on), "Field Methods for Retrieval and Analysis of Soluble Salts on Substrates" (Pittsburgh, PA: SSPC). t17l SSPC-PA 2 (latest revis on), "Measurement of Dry Coating Thickness with Magnetic Gages" (Pittsburgh, PA: SSPC). (lBl SSPC-PA 4 (latest revis on), "Guide to Maintenance Painting with Oil Base or Alkyd Painting Systems" (Pittsburgh, PA: SSPC).


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