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1

(b)The nameplate thickness shall be sufficient to resist

distortion due to the application of the marking and to be

compatible with the method of attachment. The nameplate

nominal thickness shall not be less than 0.020 in.

(c) Nameplates may have markings produced by either

casting, etching, embossing, debossing, stamping, or en-

graving, except that the Certification Mark shall be

stamped on the nameplate.

(1)The required markings on a nameplate shall be in

characters not less than 5/32 in. (4 mm) high, except that

characters for pressure relief device markings may be

smaller.

(2)Characters shall be either indented or raised at

least 0.004 in. (0.10 mm) and shall be legible and

readable.

(d)The nameplate may be marked before it is affixed to

the vessel, in which case the Manufacturer shall ensure

that the nameplate with the correct marking has been ap-

plied to the proper vessel, and the Inspector shall satisfy

himself that this has been done.

(e)The nameplate shall be attached to the vessel or to a

pad, bracket, or structure that is welded, brazed, soldered,

or attached with mechanical fasteners directly to the ves-

sel. Mechanical fasteners shall be of a material and design

that is compatible with the vessel, bracket materials, and

the vessel service. After installation of the pad, bracket,

or structure, the heads of the fasteners shall be welded,

brazed, or soldered to the pad, bracket, or structure that

supports the nameplate. The nameplate shall be located

within 30 in. (760 mm) of the vessel. Removal shall re-

quire the willful destruction of the nameplate, or its at-

tachment system. (SeeM-3.)(1) Nameplates may be attached either by welding,

brazing, or soldering.

(2)Nameplates may be attached by tamperresistant

mechanical fasteners of suitable metal construction.

(3) Nameplates may be attached with pressure

sensitive acrylic adhesive systems provided that, in addi-

tion to the requirements of this paragraph, those of

Mandatory Appendix 18are met.

(f) An additional nameplate in accordance with (a)

through (d) may be installed on the skirt, supports, jacket,

or other permanent attachment to a vessel. All data on the

additional plate, including the Certification Mark with the

Designator, shall be as required for the mandatory name-plate. The marking need not be witnessed by the Inspec-

t o r . T h e a d d i t i o n a l n a m e p l a t e s h a l l b e m a r k e d :

DUPLICATE.

(g)When a nameplate is employed, the Manufacturers

name or identifying trademark, and vessel serial number

(or National Board Number, if applicable,) may also be

marked directly on the vessel in close proximity to the

nameplate attachment. The marking shall be of a visible

permanent type that is not detrimental to the vessel, and

its location shall be indicated on the Data Report.

(1)If the thickness limitations ofUG-118 preclude

marking directly on the vessel shell or heads, it may be ap-

plied to the skirt, supports, jacket, or other permanent at-tachment to the vessel.

UG-120 DATA REPORTS

(a)A Data Report shall be filled out onForm U-1 or

Form U-1Aby the Manufacturer and shall be signed by

the Manufacturer and the Inspector for each pressure ves-

sel marked with the Certification Mark with the U

Designator.

(1)Same day production of vessels may be reported

on a single Form provided all of the following require-

ments are met:

(-a) vessels must be identical;

(-b) vessels must be manufactured for stock or forthe same user or his designated agent;

(-c) serial numbers must be in uninterrupted se-

quence; and

(-d) the Manufacturers written Quality Control

System includes procedures to control the development,

distribution, and retention of the Data Reports.

(2)The number of lines on the Data Report used to

describe multiple components (e.g., nozzles, shell courses)

may be increased or decreased as necessary to provide

space to describe each component. If addition of lines used

13 Figure UG-118Form of Stamping

W (if arc or

gas welded)

RT (if radiographed)

HT (if postweld

heat treated)

Certified by

(Pressure) at (temperature)

(Name of Manufacturer)

Manufacturers serial number

Year built

Max. allowable working pressure (internal)

(Temperature) at (pressure)Min. designmetal temperature

(Pressure) at (temperature)Max. allowable working pressure

(external) [if specified, see Note (1)]

U or UM

GENERAL NOTE: Information within parentheses is not part of the

required marking. Phrases identifying data may be abbreviated; mini-

mum abbreviations shall be MAWP, MAEWP, MDMT, S/N, FV, and

year, respectively. SeeL-11for sample Nameplate markings.

NOTES:

(1) The maximum allowable external working pressure is required

only when specified as a design condition.

(2) For cases where the MAWP (internal) and MAWP (external) va-

lues have the samedesignated coincidenttemperature, the values

may be combined on a single line as follows:

85

2013 SECTION VIII - DIVISION 1 UG-119 UG-120

(external)

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1

2-F.9 FIGURES

Figure 2-F.1Form of Stamping

U2

Letters Denoting The Construction Type

(see paragraphs 2-F.1(h) and 2-F.1(i))[Note (1)]

Certified by

_______________________________________

(Name of Manufacturer)

____________________at ____________________

Maximum Allowable Working Pressure (Internal)

____________________at ____________________

Maximum Allowable External Working Pressure (External)[Note (2)]

____________________at ____________________

Minimum Design Temperature

_________________________________________

Manufacturers Serial Number

_________________________________________

Year Built_________________________________________

Code Edition & Addenda

GENERAL NOTES:

(a) For cases where the MAWP (internal) and MAWP (external) have the same designated coincident temperature, the values may be com-

bined on a single line as follows:

(b) The letters FV may be used to designate a full vacuum condition, e.g., 150 psi/FV at 300F

NOTES:

(1) Information within parentheses is not part of the required marking. Phrases identifying data may be abbreviated; minimum abbreviations

shall be MAWP, MDMT, S/N, and year, respectively.

(2) The maximum allowable external working pressures required only when specified as a design condition.

43

2013 SECTION VIII, DIVISION 2

(external)

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Step 6. Determine the applicable forces.

4:5:46

4:5:47

4:5:48

4:5:49

4:5:50

4:5:51

4:

5:

52

Step 7. Determine the average local primary membrane stress and the general primary membrane stress at the nozzle

intersection.

4:5:53

4:5:54

Step 8. Determine the maximum local primary membrane stress at the nozzle intersection:

4:5:55

Step 9. The calculated maximum local primary membrane stress should satisfyEquation (4.5.56). If the nozzle is sub-

jected to internal pressure, then the allowable stress, Sa l l ow , is given byEquation (4.5.57). If the nozzle is subjected to

external pressure, then the allowable stress is given by Equation (4.5.58)whereFha is evaluated inparagraph 4.4for the

shell geometry being evaluated (e.g., cylinder, spherical shell, or formed head).

4:5:56

where

4:5:57

4:

5:

58

Step 10. Determine the maximum allowable working pressure at the nozzle intersection.

4:5:59

4:5:60

244

2013 SECTION VIII, DIVISION 2

fN

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Section4.4DesignofShellsUnderExternalPressureandAllowableCompressiveStresses

(4.4.7.1)SphericalShellandHemisphericalHead

ThevariablenamesFicandFheareswitchedinthestepwiseprocedurallines

this should be Fhe

this should be Fic

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Section4.18DesignRulesforShellandTubeHeatExchangers

Sec.4.18.9.4RulesfortheDesignforFloatingTubesheets

Step10paragraph

Hisgivenbyequation(4.18.123)

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