mss-sp-112 (1999)
TRANSCRIPT
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STD-MSS
SP-112-ENGL li797 m
5 7 7 0 b 4 0
0501287 364 W
SP-112-1999
Quality Standard for Evaluation of Cast
Surface Finishes
Visual and Tactile Method
Standard Practice
Developed and A pproved by the
Manufacturers Standardization Society of the
Valve an d F ittings Industry, Inc.
127 Park Street,
N.E.
Vienna, Virginia 221
80
703)
281
-661
3
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STD-MSS
P L L Z E N G L w m
m
5 7 ~ 0 ~ 4 05 0 1 a a
ZTO
œ
MSS
STANDARD
PR CTICE SP-112
An MSS Standard Practice is intended as a basis for common practice by the manufacturer the user
and
he general
public. The existence of an MSS Standard Practice does not in itself preclude the manufacture, sale,
or
use of
products not conforming to the Standard Practice. Mandatory conformance is established only by reference in a
code, specification,
sales
contract, or public law, as applicable.
Unless otherwise specifically noted in this MSS SP, any standard referred to herein is identified by the date
of
issue
that w s applicable to the referenced standard s) at the date of issue of this
MSS
SP.
See
Annex A.)
In this Standard Practice all notes, annexes, tables, and figures
are
construed to be essential to the understanding of
the message of the standard, and are considered
part
of the text unless noted
as
“supplemental”. All appendices
appearing in this document are construed as “supplemental”. “Supplemental” information does not include manda-
tory requirements.
U.S.
customary units in this
SP
are the standard; the metric units are for reference only.
Substantive changes in this
1999
edition are “flagged” by
parallel
bars as
shown on the margins of this paragraph. The
specific detail of the change may bedetermined by comparing
I
he material flagged with that in the previous edition.
Non-toleranced Dimensions in this Standard Practice
are
nominal, and, unless otherwise specified, shall be consid-
ered ‘‘for reference only.”
Any
part
of
this standard
m a y
be quoted. Credit lines should read “Extractedfrom
MSS
SP-I
12
1999
with permis-
sion of the publisher the Manufacturers Standa rdization Society’ Reproduction prohibited under copyright conven-
tion unless written permission is granted
by
the Manufactures Standardization Society of the Valve and Fittings
Inàustty Inc.
Originally Approved January, 1993
Copyright@,1993 by
Manufacturers Standardization Society
of the
Valve and Fittings Industry, Inc.
Printed in U.S.A.
1
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STD-ISS SP-112-ENGL
1999
M
5 7 7 0 b 4 0 0 5 0 3 2 8 9 1 3 7
MSS
STANDARD PRACTICE SP 112
One
of
the
MSS
Cast Surface Comparators,as described in Section 4 and Figure
1,
is included with the purchase
of
this written standard because it is
a
necessary
part
of the standard. AdditionalMSS Cast Surface Comparators may
be
purchased by writing
or
calling MSS at the following:
Manufacturers Standardization Society
of
the Valve and Fittings Industry, Inc.
127 Park
Street, NE
Vienna, Virginia 221
80
Phone
No.
703)
281-6613
11
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~
~
STDJ SS SP-512-ENGL 1 7 7 7 m
s n o b 4 0 o s o m o
7 5 7 rn
MSS
STANDARD
PR CTICE
SP-112
TABLE
OF
CONTENTS
SECTION
PAGE
TERMSAND
CONDITIONS
..................................................................................................................................................
i
FOREWORD
............................................................................................................................................................................ II
TABLEOF CONTENTS ...........................................................................................................................................................
111
O
PURPOSE
............................................................................................................................................................................
1
1. SCOPE
.................................................................................................................................................................................
1
2.
DEFLNITIONS
..................................................................................................................................................................... 1
3. CAST SURFACE FINISH ................................................................................................................................................... 2
4.
MSSCAST SURFACE COMPARATOR
............................................................................................................................ 2
5 . PROCEDURE ...................................................................................................................................................................... 2
6. ACCEPTANCE OR REJECTION .......................................................................................................................................
3
..
...
FIGURE 1:
MSS
Cast Surface Comparator .............................................................................................................................. 3
ANNEX
A:
Referenced
Standards and App licable Dates ..................................................................................................... 4
...
111
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STD-MSS SP-112-ENGL 1999 H 5 7 7 0 b 4 0 0501i91 8 9 5
MSS
STANDARD
PRACTICE
SP 112
OUALITY STANDARD
FOR
EVALUATION
OF
CAST
SURFACEFINISHE3
VISUAL AND TACTILE METHOD
PURPOSE
To establish
an
easy “sight and feel” method for the
quality evaluation of cast surface finishes.
To make available a Cast Surface Comparator with
MSS
surfacenumber through
10
to be used to mni-
tor surfacefinish by a visual and tactile
method.
To
provide guidance of surface finish by “sight and
feel’’
to minimize misunderstanding which may oc
cur between purchaser and manufacturer.
1.1 This
surface quality Standard Practice provides
criteria for the visual and tactile evaluation of
cleaned AS-CAST surface finishes of components
manufactured from castings.
1.2 This Standard Practice and its supporting MSS
Cast Surface Comparator
may
beapplied to surfaces
formed by any casting method.
1.3 This Standard Practice provides visualand tac-
tile criteria for evaluating casting surface finish and
texture which can be used to develop an acceptable
quality level.
1.4
Cast surfaces on materials such as gray iron,
ductile iron, bronze and malleableironmay
be
com-
pared with the use of this Standard Practice, how-
ever, it is not the intention to limit it to these type of
materials.
1.5
This Standard Practice does not apply to
ma
chined surfaces, or those surfaces that are intended
to machined.
1.6 This Standard Practice is limited to “sight and
feel” by comparison without measurement. Luster
and color are not part of this Standard Practice.
1.7 This Standard Practice is not intended for use
on those castings where bum-in, slag, scabs, etc. so
distort the surface that the comparator can not be
used and the casting may be rejected for other
causes.
2.
pEFINJTIONS
Refer to
A S E
B46.1-
SURFACETEXTURE
Sur-
face Roughness, Waviness, and Lay).
1
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STD-MSS S P - L I Z - E N G L
1999 5 7 7 0 b 4 0 0 5 0 1 2 9 2 721
MSS
STANDARD PRACTICE SP 112
3.
4
CAST SURFACE
FINIS
H
3.1 General: Therearemany methods of measuring
cast surface finishes to establish a criteria for quality
acceptance limits These are primarily by measure-
ment or pictures.
See
he references listed
in
Annex
A
of
this Standard
Practice for other inspection meth-
ods
3.2 Cast Surface finishes involve texture, roughness,
waviness, lay and flaws. For definitions and other
actual measurement methods for various surface ir-
regularities refer
to ASME B46.1
r any of the other
referend standards.
3.3 The casting
method
and
material used
will
in-
fluence the surface roughness. consideration must
be
given to the actual acceptable surface finish and
its final function. A mutual agreement should be
made
between purchaser and manufacturer.
3.4 The degree of roughness forms the criteria
of
this Standard Practice. Through the use of the
MSS
Cast Surface Comparator and its 10 three-dimen-
sionalsufaces,an acceptable cast surface finish can
be agreed upon.
Mss cAST SURFACE COMPARATOR
4 1 The MSS
Cast
Surface Comparator is an eco-
nomical, convenient “pocket size” Comparator for
inspectionand
quality
acceptance of cast surfacefm-
ishes.
4.2 The
MSS
CastSurfaceComparator was designed
and manufactured using actual representative
samples of cast surfaces. Numbers were then as
signed to establish the degreeof roughness.
4.3Neither
optical
magnifiers
nor
m u r in ginstru
ments are required to perform the surface
inspec-
tion. It is
a
visual and tactile method.
4.4
The
MSS
Cast Surface Comparator is a
three
dimensional representationofas-cast surfacefinishes
with numbers
1
through
10.
The surface texture
roughness of a surface which needs to bequalfied is
rated
by
means of comparison to theMSS Cast Sur-
face Comparator.
Visual
and tactile comparisons can
be made
by
using this Surface Comparator.
See
Fig-
ure 1 for illustrationof the MSS Cast Surface Com-
parator.
4.5 Casting surface roughness acceptance levels
can
be
established through the use
of
the
MSS
numbers
1 through 10 regardless of casting method andor
material.
A
comparison can
be
designated by an
acceptance
MSS
number andíor between numbers.
The lower the MSS number, the smoother.
5. PROCEDURE
5.1
General: The quality acceptance level should
be
established by prior agreement of the customer
and manufacturer and be based on the intended use
and function of the casting. Requirements for
some
areas of the castings
may be for
cosmetic appear-
ance, rather than function. The MSS number se-
lected
can
either
be
a maximum or
a
minimum. The
cast surface finish required can also be designated
between two
MSS
numbers.
It may be desirable to establish differentMSS num-
bers for differentareasof acasting. This is based
on
whether the entire
casting
should have the same gen-
eral surface smoothness requirement or if certain
areas
are more or less critical than
others.
2
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ST D*MSS SP-112-ENGL 1999 5 7 7 0 6 4 0 0 5 0 1 2 9 3 b b 8
MSS STANDARD PRACTICE
SP 112
5.2 Clean iness: The cast surîace to
be
inspected
should be clean and
fr
of dir t oil, loose sand or
otherforeign
materialthat
would
impair
an accurate
determinationof surface finish.
5.3
Surface Evaluation: Place the
MSS
Cast Sur-
face
Comparator
near
the surface to
be
inspected
By sightand eel compare the casting surface to the
surface
of
the quaiity acceptance level established
in
section5.1. Luster and color shouldnot bea consid-
emtion only roughness.
6. ACCEPTANCE OR
~-
TIOrq
Based on the surface evaluation in Section5 and
an
agreed upon surface roughness level, the cast part
shail
be
accepted or
rejected.
MSS
CAST
SURFACE CUMPARATOR
MANUFACTURERS STANDARDIZATION SOCIETY
FOR
USE
WITH MSS SP l i2
MSS
SURFACE
FINISH
NUMBERS
1 2 3 4
5
6 7 9 10
SMOOTH
ROUGH
DEGREE OF SURFACE FINISH
MATERIAL:
MOLDED
DURABLE PLASTIC
1/8” THICK - COLOR: GRAY
FIGURE 1
-
MSS CAST SURF CE COMPARATOR
{FOR VISUAL AND TACTILE INSPECTION
3
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STD-MSS
SP-312-ENGL 3999 W 5770640 0503294 5 T 4
MSS STANDARD PRACTICE SP 112
I
ANNEXA
I
REFE RENC E STANDARDS AND APPLICABLE DATES
This Annex is
an
ntegral part of this Standard Practice and is placed after the main text for convenience.
Standard Name or Description
ASME, ANSYASME. ANSI. ASMWANSI
B
46.1-1995
Surface Texture Surface Roughness, Waviness and Lay)
ASTM Suecifications for:
A802lA802M-89
Standard Practice for Steel Castings, Surface Acceptance Standards,
Visual Examination
SP-55-1996
Quality Standard for Steel Castings for Valves, Flange and Fittings and
Other Piping Components-Visual Method for Evaluation of Surface
Irregularities
SP-53-1995
Quality Standard for Steel Castings and Forgings for Valves, Flanges
and Fittings and other Piping Components-Magnetic Particle Examina-
tion Method.
SP-93- 1999
Quality Standard for Steel Castings and Forgings for Valves, Flanges
and Fittings and Other Piping Components-Liquid Penetrant Examina-
tion Method
Publications of the following organizations appear in the above list:
SME
The American Society of Mechanical Engineers
3
Park Ave., New York, NY
10016-5990
ASTM
American Society for Testing and Materials
100 Bar
Harbor
Drive, West Conshohoken, PA 19428-2959
MSS
Manufacturers Society of the Valve and Fittings Industry, Inc.
127 Park Street,
N.E.
Vienna, VA 22180
4
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STDmMSS SP-112-ENGL
1999
5 7 7 0 6 4 0 0501295
430 W
Number
SP-6-1996
SP-9-1997
SP-25-1998
SP-42-1999
SP-43-1991
SP-44-1996
SP-45-1998
SP-51-1991
SP-53-1999
SP-54-1999
SP-55-1996
SP-58-1993
SP-60-1999
SP-61-1999
SP-65-1999
SP-67-1995
SP-68-1997
SP-69-1996
SP-70-1998
SP-71-1997
SP-72-1999
SP-73-1991
SP-75-1998
SP-77-1995
sp-78-19ga
SP-79-1999a
SP-80-1997
SP-81-1995
SP-82-1992
SP-83-1995
SP-85-1994
SP-86-1997
SP-87-1991
SP-88-1993
SP-90-1986
SP-91-1992
SP-92-1999
SP-93-1999
SP-94-1999
SP-95-1999
SP-96-1996
SP-97-1995
SP-98-1996
sp-a9-1998
List of MSS Standard Practi ces
Price List Available Upon Request)
Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings
Spot Facing for Bronze, Iron and Steel Flanges
Standard Marking System For Valves, Fittings, Flanges and Unions
(R 95) Class 150 Corrosion Resistant Gate, Glove, Angle and CheckValves with Flanged and Butt Weld Ends
R
96) W rought Stainless Steel Butt-welding Fittings
Steel Pipeline Flanges
Bypass and Drain Connections
(R 95) Class 150LW Corrosion Resistant Cast Flanges and Flanged Fittings
Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components Magnetic Particle Examination Method
Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Pip ing Components Radiographic Examination Method
Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Com ponents -Visua l Method for Eval. of Surface Irregularities
Pipe Hangers and Supports Materials, Design and Manufacture
Connecting Flange Joint Between Tapping Sleeves and Tapping Valves
PrecsureTesting of Steel Valves
High Pressure Chemical Industry Flanges andThreaded Stubs for Use with Lens Gaskets
Butterfly Valves
High Pressure Butterfly Valves with Offset Design
Pipe Hangers and Supports Selection and Application
Cast Iron Gate Valves, Flanged andThreaded Ends
Gray Iron Sw ing CheckValves, Flanged andThreaded Ends
Ball Valves with Flanged or Butt -weld ing Ends for General Service
(R 96) Brazing Joints for Wrought and Cast Copper Alloy Solder Joint Pressure Fittings
Specification for H igh Test Wrought But t Welding Fittings
Guidelines for Pipe Support Contractual Relationships
(R 92) Cast Iron Plug Valves, Flan ged andThreaded Ends
Socket-Welding Reducer Inserts
Bronze Gate, Globe, Angle and Check Valves
Stainless Steel, B onnetless, F langed, Knife Gate Valves
Valve Pressure Testing Methods
Class 3000 Steel Pipe Unions, Socket-Welding and Threaded
Cast Iron Globe L AngleValves, Flanged andThreaded Ends
Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators
(R 96) Factory-Made Butt-welding Fittings for Class
1
Nuclear Piping Applications
Diaphragm Type Valves
Pipe Hangers and Suppo rts Fabrication and installation Practices
(R 91) Guidelines on Terminology for Pipe Hangers and Supports
(R 96) Guideline s for Manu al Operation of Valves
R 92) MSSValve User Guide
(R
92) Quality Standard for Steel Castings and Forgings forvalves, Flanges, and Fittings and Other Piping Components Liquid Penetrant Examination Methoc
Quality Std for Ferritic and Ma rtensitic Steel Castings for Valves, Flanges, and Fittings and Other Piping Components Ultrasonic Exam ination Method
(R
91) Swage (d) Nipples and Bull Plugs
Guidelines on Terminology for Valves and Fittings
Integrally Reinforce d Forged Branch Outlet Fittings Socket Welding,Threaded and Buttwelding Ends
Protective Coatings for the Interior of Valves, Hydrants, and Fittings
SP-99-1994 Instrumen t Valves
SP-100-1997 Qualification Requirem ents for Elastom er Diaphragm s for Nuclear Service DiaphragmTy pe Valves
SP-101-1989 Part-TurnValve Actuaior Attachment Flange and Driving Component Dimensions and Performance Characteristics
SP-102-1989 Multi-Turn Valve Actuator Attac hment - Flange and Driving Com ponent Dimensions and Performance Characteristics
SP-103-1995 Wrought Copper and Copper Alloy Insert Fittings for Polybutylene Systems
SP-104-1995 Wrough t Copper Solder Join t Pressure Fittin gs
SP-105-1996 Instrument Valves for Code Application s
SP-106-1990 (R 96) Cast Copper Alloy Flang es and Flanged Fittings, Class 125,150 and 300
SP-107-1991 Transition Un ion Fittings for Joining Metal and Plastic Products
SP-108-1996 Resilient-Sea ted Cast Iron-Eccentric Plug Valves
SP-109-1996 Welded Fabricated Copper Solder Join t Pressure Fittin gs
SP-110-1996 Ball ValvesT hreaded, Socke t-Welding, Solder Joint, Grooved and Flared Ends
SP-111-1996 Gray-Iron and Du ctile-Iron Tapping Sleeves
SP-112-1999 Quality Standard for Evaluation of Cast Surface Finishes -Visua l andTactile Method. This SP must be sold w ith a 10-surface,
three dim ens iona l Cast Surface Comparator, which is a necessary part of the Standard.
Additional Comparators may be sold separately at $19.00 each. Same quantit y disco unts apply on total order.
SP-113-1999 Connec ting Join t between Tapping Machines andTap ping Valves
SP-114-1995 Corrosion Resistant Pipe FittingsTh readed and Socket Welding, Class 150 and
1000
SP-115-1999 Excess Flow Valves for Natural Gas Service
SP-116-1996 Service Line Valves and Fittings for Drinking Water System s
SP- I 17-1996 Bellows Se als for Globe and Gate Valves
SP-118-1996 Comp act Steel Globe L Check Valves Flanged, Flangeless,Threaded &We ldin g Ends (Chemical & Petroleum Refinery Service)
SP-119-1996 Belled End Socket Welding Fittings, Stainless Steel and Copper Nickel
SP-120-1997 Flexible Graphite Packing System for Rising Stem Steel Valves (Design Requirem ents)
SP-121-1997 Qua lifica tion Testing M ethods for Stem Packing for Risin g Stem Steel Valves
SP-122-1997 Plastic Indust rial Bal l Valves
SP-123-1998 Non-Ferrous Threaded and Solder-Joint U nion s for Use With Copper Water Tube
(R-YEAR) Indicates year standard reaffirmed without substantive changes
A large number of former MSC Practices have been approved by the ANSI or ANSI Standards, published by others. In order to maintain a sin gle source of au thoritative
information, he MSC withdraws i ts Standard Practices n such cases.
Manufacturers Standardization Society
of
the Valve and Fitt ings Industry, Inc.
127 Park Street, N.E.,Vienn a,VA 22180-4620 703) 281-6613 Fax 703) 281-6671