ASME Section VIII div 2 2010. ASME Boiler and Pressure Vessel Code. Alternative Rules

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xxxix

LIST OF CHANGES IN RECORD NUMBER ORDER

RC Number Location Change (Record Number)

01-576 Paragraph 4.C.1.1 Delete word welds (01-576)

Paragraph 4.C.1.1.a Insert phrase” tube-to-tubesheet joints having”

Paragraph 4.C.1.1.b Insert phrase “tube-to-tubesheet joints having” and word “as”

delete phrase “shall be” and word “and” (01-576)

Paragraph 4.C.1.3.b Delete word “provided” insert word “if”

Paragraph 4.C.1.5.b.1 Rephrase item (01-576)

Paragraph 4.C.1.5.b.2 Insert reference to 4.C.1.5.b.4 (01-576)

Paragraph 4.C.1.5.b.4 Insert reference to 4.C.1.5.b.2 (01-576)

Paragraph 4.C.2 Rephrase paragraph (01-576)

Paragraph 4.C.3.3 Insert space between E and 8 (01-576)

Paragraph 4.C.3.11.a Insert word “the” in line 3 (01-576)

Paragraph 4.C.4.2 Rephrase and insert symbols (01-576)

Paragraph 4.C.5 Delete word “met” and replace with “satisfied” (01-576)

Nomenclature

Correct definition for

(01-576)

Nomenclature

Add definition for

(01-576)

03-1422 Table 3.A.3 Add entry for SA-564, SA-693, and SA-705 (03-1422)

05-151 Table 6.1 Delete last row in table (05-151)

Figure 6.6 Delete figure (05-151)

05-484 Paragraph 4.18.8.3.a Insert phrase “tube-to-tubesheet joint” (05-484)

Paragraph 4.18.8.3.c Insert phrase “and that the resulting tube-to-tubesheet joint

load is acceptable” (05-484)

Paragraph 4.18.8.3.d Delete word “or” between shell and channel Insert phrase “or

tube-to-tubesheet joint,” (05-484)

Paragraph 4.18.8.3.e.2 Delete item 2 (05-484)

Paragraph 4.18.8.4.i STEP 9 insert phrase “and tube-to-tubesheet joint design “

after word stress (05-484)

Paragraph 4.18.8.4.i.2-

Revise section(05-484)

Paragraph 4.18.9.3.b Insert phrase “tube-to-tubesheet joint” (05-484)

Paragraph 4.18.9.3.d Insert phrase “and that the resulting tube-to-tubesheet joint

load is acceptable” (05-484)

Paragraph 4.18.9.3.e.2 Delete item 2 and renumber (05-484)

Paragraph 4.18.9.4.i STEP 9 insert phrase “and tube-to-tubesheet joint design “

after word stress (05-484)

Paragraph 4.18.9.4.i.2-

Revise section(05-484)

Nomenclature

Add definition for

(05-484)

06-17 Paragraph 4.18.8.4.l.2

& 3

STEP 12 Expand option 2 and delete subparagraphs in option

3 (06-17)

Paragraph 4.18.9.4.k STEP 11 add option 3 (06-17)

Paragraph 4.18.8.6 Replace “Young’s modulus” with “modulus of elasticity” (06-

17)

Paragraph 4.18.9.5 new Add calculation procedure for effect of plasticity at

tubesheet/channel or shell joint for floating tubesheets (06-17)

07-1352 Paragraph 4.15.3.3.c.1

Delete

replace with

. (07-1352)

Paragraph 4.15.3.3.c.2 Revise paragraph references(07-1352)

Nomenclature

Add definition for

(07-1352)

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RC Number Location Change (Record Number)

07-1873 Table 1.1 Correct revision dates in Table 1.1 and correct numbering on

rollover of Table 1.1 to next page (07-1873)

07-251 Paragraph 2.C.3.1.d.1 Provide elaboration on repair records (07-251)

07-256 Paragraph 8.1.2.d Expand safety requirements for air or gas pressure testing

(07-256)

07-347 Paragraph 6.5.5.1 Delete NOTE after 6.5.5.1.b (07-347)

07-909 Paragraph 4.16.7.2.f Insert statements concerning maximum bolt spacing and

flange moments in the calculation of rigidity index (07-909)

Equation 4.16.14 Correct equation to include bolt spacing correction (07-909)

Equation 4.16.17 Correct equation to include bolt spacing correction (07-909)

Paragraph 4.16.7.2.j Insert statements concerning flange moments in the

calculation of rigidity index (07-909)

Nomenclature

Add definition for

max

,, ,

ssc

aB B B

(07-909)

Table 4.16.10 Insert Reverse integral type flange, reverse loose type flange

with a hub, and add reverse loose type to loose type flange

without hub (07-909)

Table 4.16.11 Add table for bolt spacing equations (07-909)

08-108 Paragraph 2.4.2 Delete phrase “sovereign government “ and replace with

jurisdiction (08-108)

08-1499 Table 4.1.1

Amend description for Load Parameter

(

08-1499)

08-1560 Paragraph 4.1.8.2 Revise paragraph for clarity (08-1560)

Paragraph 4.18.14.3 Correct reference to paragraph 4.1.8.2 and revise for clarity.

(08-1560)

08-361 Table 2.D.3 Form A-1 Item 5 Replace “data” with date (08-361)

Table 2.D.3 Form A-1 Item 12 replace “wid” with “wld” (08-361)

Table 2.D.3 Form A-1 Item 45 line 7 delete psi (08-361)

Table 2.D.3 Form A-2 Item 4 delete one period (08-361)

Table 2.D.3 Form A-2 Item 5 Replace “data” with date (08-361)

Table 2.D.3 Form A-2 Item 12 replace “wid” with “wld” (08-361)

Table 2.D.3 Form A-2 Item 43 Lines 5 and 6 replace “pressure vessel” with “part”

(08-361)

Table 2.D.3 Form A-2 Item 43 Line 4 Add underline after word “on” (08-361)

08-613 Paragraph 4.3.11.4.f Replace “average circumferential” with “hoop” and “average

longitudinal” with “axial” (08-613)

Paragraph 4.3.11.4.f

Replace

with

and

with

(08-613)

Paragraph 4.3.11.4.f Revise text (08-613)

Equations 4.3.54 and

4.3.55

Correct variables (08-613)

Paragraph 4.3.11.5.f Replace “average circumferential” with “hoop” and “average

longitudinal” with “axial” (08-613)

Paragraph 4.3.11.5.f

Replace

with

and

with

(08-613)

Paragraph 4.3.11.5.f Revise text (08-613)

Paragraph 4.3.12.2.e Replace “average circumferential” with “hoop” and “average

longitudinal” with “axial” (08-613)

Paragraph 4.3.12.2.e

Replace

with

and

with

(08-613)

Paragraph 4.3.12.2.e Revise text (08-613)

Equations 4.3.67 and

4.3.68

Correct variables (08-613)

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RC Number Location Change (Record Number)

08-613 Paragraph 4.3.12.3.e Replace “average circumferential” with “hoop” and “average

longitudinal” with “axial” (08-613)

Paragraph 4.3.12.3.e

Replace

with

and

with

(08-613)

Paragraph 4.3.12.3.e Revise text (08-613)

Nomenclature

Delete definition for

and

(08-613)

Nomenclature

Replace “circumferential” with “hoop (circumferential)” for

and “meridional” with “axial (longitudinal)” for

(08-613)

Equation 4.4.55 Correct equation ratio in denominator was inverted (08-613)

Paragraph 4.4.13.2 Revise paragraph (08-613)

Paragraph 4.4.14 Add subparagraphs 4.4.14.1 and 4.4.14.2 (08-613)

08-631 Paragraph 4.5.4.1 Add sentence on corrosion allowance (08-631)

Table 4.5.2 Replace existing table with new table (08-631)

08-75 Paragraph 8.1.3.2 Delete paragraph 8.1.3.2.d (08-75)

8.1.3.4 Delete paragraph 8.1.3.4 (08-75)

08-765 Table 3.A.6 Change Table Title to Nickel and Nickel Alloys (08-765)

Table 4.4.1 Add reference to Part 3.A Table 3.A.1 (08-765)

08-830 Paragraph 4.19.2.e Revise paragraph (08-830)

Paragraph 4.19.2.f Add paragraph f (08-830)

Paragraph 4.19.3.1.h Revise paragraph

09-11-09 Table 4.3.7 See RC 09-1800 (09-11-09)

Table 4.3.8 See RC 09-1800 (09-11-09)

09-1335 Paragraph 3.11.4.3.a.2 Correct subparagraph reference (09-1335)

Paragraph 3.11.4.3.a.3 Delete word “not” line1 after word “content” (09-1335)

09-1604 Figure 5.F.1 Remove phrase “For Accelerated Tests” from title (09-1604)

Figure 5.F.2 Add phrase “For Accelerated Tests” to title (09-1604)

09-1782 Paragraph 3.2.6.1 Correct paragraph header (09-1782)

Paragraph 4.4.12.2.d Replace word “shall” with “shell”(09-1782)

4.4.12.2.i.3 Correct paragraph references (09-1782)

Equation 5.19 Capitalize Variable “p” (09-1782)

09-18 Table 4.2.10

Corrections to design notes for

r and r

(09-18)

Table 4.2.11

Corrections to design notes for

r and r

(09-18)

Table 4.2.12

Corrections to design notes for

r and r

(09-18)

Table 4.2.13

Corrections to design notes for

(09-18)

Nomenclature

Corrections to definitions for

and

(09-18)

09-1800 Paragraph 3.6.3.3.b & c Replace word “approximate” with “appropriate”(09-1800)

Paragraph 3.D.3 Provide additional information (09-1800)

Paragraph 3.D.3 Add Equation 3.D.13, renumber all equations(09-1800)

Paragraph 3.D.5.1

Add text pointing to equation for

(09-1800)

Nomenclature

Add definition for

and

,uts t

(09-1800)

Table 3.D.2

Replace

css

with

css

(09-1800)

Equation 3.F.1 Correct equation (09-1800)

Equation 3.F.2 Correct equation (09-1800)

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xlii

RC Number Location Change (Record Number)

Equation 3.F.3 Add equation and renumber all other equations and

references(09-1800)

09-1800 Equation 3.F.8 Correct constant in denominator(09-1800)

Nomenclature

Add definition for

usm

and

(09-1800)

Table 3.F.11

Replace

range

with

,ess k

(09-1800)

Table 3.F.11M

Replace

range

with

,ess k

(09-1800)

Nomenclature

Add definition for

eth

Change definition for

delete extra

, delete

(09-1800)

Table 4.3.5 Correct values for equation coefficients (09-1800)

Table 4.3.6 Correct values for equation coefficients (09-1800)

Table 4.3.7 Delete - in rows 1 and 4 replace with :(09-1800)

Table 4.3.7 Correct equations for stress in non compact knuckle region

(09-1800)

Table 4.3.8 Delete - in rows 1 and 4 replace with :(09-1800)

Table 4.3.8 Correct equations for stress in non compact flare region (09-

1800)

Paragraph 4.4.12.2.i.3. Correct paragraph references (09-1800)

Nomenclature

Correct definition for

add definition for

(09-1800)

Figure 4.4.3a Correct figure (09-1800)

Nomenclature

Correct definition for

(09-1800)

Equation 4.11.4 Correct equation (09-1800)

Nomenclature

Correct definition for

(09-1800)

Paragraph 4.16.6.1.c.2 Correct item numbering (09-1800)

Nomenclature

Delete extra definition for

(09-1800)

Figure 4.17.1 Correct detail d and Note 1(09-1800)

Equation 5.19 Capitalize Variable “p” (09-1800)

Paragraph 5.5.3.2.e Add paragraph 3.F.1 (09-1800)

Paragraph 5.5.4.2.g Add paragraph 3.F.1 (09-1800)

Paragraph 5.5.5.2.g Add paragraph 3.F.2 (09-1800)

Table 5.11 Correct values (09-1800)

Nomenclature

Add definition for

(09-1800)

09-1832 Paragraph 6.4.3.8 Add “such as “spot” or “bulls eye” local heating” after word

configurations in line 1 (09-1832)

09-1918 Table 2.D.3 Form A-1 Correct description item15 Notes 22 and 24 to

“Nondestructive Examination” (09-1918)

Table 2.D.3 Form A-2 Correct description item 8 and 16 Notes 22 and 24 to

“Nondestructive Examination” (09-1918)

Paragraph 7.5.5.1 Delete paragraphs b, c, d, and f, renumber and edit remaining

paragraphs (09-1918)

Paragraph 7.5.5.2, Delete paragraphs and renumber (09-1918)

Paragraph 7.5.5.3 Delete paragraphs and renumber (09-1918)

Table 7.8 Correct paragraph references (09-1918)

09-1943 Figures 7.16 and 7.17 Add figures (09-1943)

09-204 Table 3.A.3 Add SA-240 S32550 (09-204)

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xliii

RC Number Location Change (Record Number)

09-263 Table 2.H.1.Note 2 Add 3 additional example scope statements for UV Code

Symbol Stamp (09-263)

09-313 Paragraph 3.11.2.2.a Revise temperature from 32°C (90°F) to 43°C (110°F) (09-

313)

09-375 Paragraph 4.1.2.d.3 Revise to provide lower limit (09-375)

09-376 Paragraph 3.3.6.2 Delete “and” replace with “or” and add text to end of

paragraph prior to list (09-376)

09-535 Paragraph 4.2.5.5.c.4 Add word “continuous” before word “weld” in line 2 (09-535)

09-714 Equation 4.6.6 Correct equation (09-714)

Paragraph 4.6.4.3.d Add reference to Table 4.16.5 (09-714)

Paragraph 4.6.4.3.e Add reference to Table 4.16.5 (09-714)

Paragraph 4.6.4.3.f Correct reference to Table 4.16.4 (09-714)

09-75 Table 5.3 Add note (09-75)

Table 5.4 Add note and correct equations for global criteria (09-75)

Table 5.5 Add note and correct equations for global criteria (09-75)

10-114 Table Of Contents Update for all changes (10-114)

Paragraph 4.18.7.5.3

Correct

and

(10-114)

Paragraph

4.18.8.4.i.6.iv

Add word “If” to beginning of sentence. (10-114)

Paragraph 4.18.8.4.k.2 Add comma after word “cylindrical” in line 1 (10-114)

Paragraph 4.18.8.5.c.5

Correct

with

,,1

(10-114)

Paragraph 4.18.8.8.2 Correct spelling for “integral” (10-114)

Paragraph

4.18.8.8.3.b.3.i, ii

Correct

and

(10-114)

Paragraph

4.18.8.8.3.d.1 , 2

Correct numbering and change item 2 to configuration a

only(10-114)

Paragraph 4.18.9.5 Move Paragraph 4.18.9.5 to 4.18.9.7

Paragraph 4.18.9.7.2 Correct spelling for “integral” (10-114)

Paragraph

4.18.9.7.3.b.3.i, ii

Correct

and

(10-114)

Paragraph

4.18.9.7.3.d.1 , 2

Correct numbering (10-114)

Nomenclature

Correct

,,1

(10-114)

Table 4.18.4 Various corrections (10-114)

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2010 SECTION VIII, DIVISION 2

1-1

PART 1

GENERAL REQUIREMENTS

PART CONTENTS

1.1 General ................................................................................................................................. 1-2

1.1.1 Introduction .................................................................................................................... 1-2

1.1.2 Organization .................................................................................................................. 1-2

1.1.3 Definitions ...................................................................................................................... 1-2

1.2 Scope.................................................................................................................................... 1-3

1.2.1 Overview ........................................................................................................................ 1-3

1.2.2 Additional Requirements for Very High Pressure Vessels ............................................ 1-3

1.2.3 Geometric Scope of This Division ................................................................................. 1-4

1.2.4 Classifications Outside the Scope of this Division ........................................................ 1-4

1.2.5 Combination Units ......................................................................................................... 1-5

1.2.6 Field Assembly of Vessels ............................................................................................ 1-5

1.2.7 Pressure Relief Devices ................................................................................................ 1-6

1.3 Standards Referenced by This Division ............................................................................... 1-6

1.4 Units of Measurement .......................................................................................................... 1-6

1.5 Technical Inquires ................................................................................................................ 1-7

1.6 Tables ................................................................................................................................... 1-8

Annex 1.A Submittal Of Technical Inquiries To The Boiler And Pressure Vessel Standards

Committee

1.A.1 Introduction ......................................................................................................................... 1-10

1.A.2 Inquiry Format .................................................................................................................... 1-11

1.A.3 Code Revisions or Additions .............................................................................................. 1-11

1.A.4 Code Cases ........................................................................................................................ 1-11

1.A.5 Code Interpretations ........................................................................................................... 1-12

1.A.6 Submittals ........................................................................................................................... 1-12

Annex 1.B Definitions

1.B.1 Introduction ......................................................................................................................... 1-13

1.B.2 Definition of Terms ............................................................................................................. 1-13

Annex 1.C Guidance For The Use Of US Customary And SI Units In The ASME Boiler And

Pressure Vessel Codes

1.C.1 Use of Units in Equations ................................................................................................... 1-15

1.C.2 Guidelines Used to Develop SI Equivalents ....................................................................... 1-15

1.C.3 Soft Convers

ion Factors ..................................................................................................... 1-16

1.C.4 Tables ................................................................................................................................. 1-17

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2010 SECTION VIII, DIVISION 2

1-2

1.1 General

1.1.1 Introduction

1.1.1.1 This Division contains mandatory requirements, specific prohibitions, and non-mandatory

guidance for the design, materials, fabrication, examination, inspection, testing, and certification of pressure

vessels and their associated pressure relief devices.

1.1.1.2 The Code does not address all aspects of these activities. Those aspects that are not specifically

addressed should not be considered prohibited and shall be addressed by appropriate engineering judgment.

Engineering judgment shall be consistent with the philosophy of this Division, and such judgments shall never

be used to overrule mandatory requirements or specific prohibitions of this Division.

1.1.2 Organization

1.1.2.1 The requirements of this Division are contained in the nine Parts listed below. Each of these

Parts and Annexes is composed of paragraphs that are identified by an alphanumeric numbering system in

accordance with the ISO Standard Template for the Preparation of Normative-Type Documents. References

to paragraphs are made directly by reference to the paragraph number. For example, the Scope is

referenced as paragraph 1.2.

a) Part 1 – General Requirements, provides the scope of this division and establishes the extent of

coverage

b) Part 2 – Responsibilities and Duties, sets forth the responsibilities of the user and Manufacturer, and the

duties of the Inspector

c) Part 3 – Materials Requirements, provides the permissible materials of construction, applicable material

specification and special requirements, physical properties, allowable stresses, and design fatigue

curves

d) Part 4 – Design By Rule Requirements, provides requirements for design of vessels and components

using rules

e) Part 5 – Design By Analysis Requirements, provides requirements for design of vessels and

components using analytical methods

f) Part 6 – Fabrication Requirements, provides requirements governing the fabrication of vessels and parts

g) Part 7 – Examination and Inspection Requirements, provides requirements governing the examination

and inspection of vessels and parts

h) Part 8 – Pressure Testing Requirements, provides pressure testing requirements

i) Part 9 – Pressure Vessel Overpressure Protection, provides rules for pressure relief devices

1.1.2.2 Mandatory and non-mandatory requirements are provided as normative and informative annexes,

respectively, to the specific Part under consideration. The Normative Annexes address specific subjects not

covered elsewhere in this Division and their requirements are mandatory when the subject covered is

included in construction under this Division. Informative Annexes provide information and suggested good

practices.

1.1.2.3 The materials, design, fabrication, examination, inspection, testing, and certification of pressure

vessels and their associated pressure relief devices shall satisfy all applicable Parts and Normative Annexes

shown above in order to qualify the construction in accordance with this Division.

1.1.3 Definitions

The definitions for the terminology used in this Part are contained in Annex 1.B.

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2010 SECTION VIII, DIVISION 2

1-3

1.2 Scope

1.2.1 Overview

1.2.1.1 In the scope of this division, pressure vessels are containers for the containment of pressure,

either internal or external. This pressure may be obtained from an external source or by the application of

heat from a direct or indirect source as a result of a process, or any combination thereof.

1.2.1.2 The rules of this Division may be used for the construction of the following pressure vessels.

a) Vessels to be installed at a fixed (stationary) location for a specific service where operation and

maintenance control is retained during the useful life of the vessel by the user and is in conformance with

the User’s Design Specification required by Part 2.

b) Pressure vessels installed in ocean-going ships, barges, and other floating craft or used for motor

vehicle or rail freight. For these applications it is necessary that prior written agreement with the

jurisdictional authority be established covering operation and maintenance control for a specific service.

This operation and maintenance control must be retained during the useful life of the pressure vessel by

the user in conformance with the User's Design Specification required in Part 2. Such a pressure vessel

as described above may be constructed and stamped within the scope of this Division provided it meets

all other requirements as specified with the following additional provisions.

1) Loading conditions imposed by movement of the pressure vessel during operation and by relocation

of the pressure vessel between work sites or due to loading and discharge, as applicable, shall be

considered in the design.

2) The User’s Design Specification shall include the agreements that define those aspects of operation

and maintenance control unique to the particular pressure vessel.

c) Pressure vessels or parts subject to direct firing from the combustion of fuel (solid, liquid, or gaseous),

that are not within the scope of Sections I, III, or IV may be constructed in accordance with the rules of

this Division.

d) Unfired steam boilers shall be constructed in accordance with the rules of Section I or Section VIII,

Division 1.

e) The following pressure vessels in which steam is generated shall be constructed in accordance with the

rules of Section VIII, Division 1 or this Division:

1) Vessels known as evaporators or heat exchangers;

2) Vessels in which steam is generated by the use of heat resulting from operation of a processing

system containing a number of pressure vessels such as used in the manufacture of chemical and

petroleum products; and

3) Vessels in which steam is generated but not withdrawn for external use.

1.2.1.3 The scope of this Division has been established to identify components and parameters

considered in formulating the rules given in this Division. Laws or regulations issued by municipality, state,

provincial, federal, or other enforcement or regulatory bodies having jurisdiction at the location of an

installation establish the mandatory applicability of the Code rules, in whole or in part, within the jurisdiction.

Those laws or regulations may require the use of this Division of the Code for vessels or components not

considered to be within its scope. These laws or regulations should be reviewed to determine size or service

limitations of the coverage which may be different or more restrictive than those given here.

1.2.2 Additional Requirements for Very High Pressure Vessels

1.2.2.1 The rules of this Division do not specify a limitation on pressure but are not all-inclusive for all

types of construction. For very high pressures, some additions to these rules may be necessary to meet the

design principles and construction practices essential to vessels for such pressures. However, only in the

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2010 SECTION VIII, DIVISION 2

1-4

event that, after application of additional design principles and construction practices, the vessel still complies

with all of the requirements of the Code, may it be stamped with the Code symbol.

1.2.2.2 As an alternative to this Division, Section VIII, Division 3 should be considered for the

construction of vessels intended for operating pressures exceeding 68.95 MPa (10,000 psi).

1.2.3 Geometric Scope of This Division

The scope of this Division is intended to include only the vessel and integral communicating chambers, and

shall include the following:

a) Where external piping, other pressure vessels including heat exchangers, or mechanical devices (i.e.

pumps, mixers, or compressors) are to be connected to the vessel:

1) The welding end connection for the first circumferential joint for welded connections (see Table

4.2.4).

2) The first threaded joint for screwed connections.

3) The face of the first flange for bolted and flanged connections. Optionally, when the first flange is

welded to the nozzle neck, the weld connecting the flange to the nozzle neck may be considered as

the first circumferential joint, provided this construction is documented in the User's Design

Specification and is properly described on the vessel drawing and the Manufacturer's Data Report

Form.

4) The first sealing surface for proprietary connections or fittings.

b) Where nonpressure parts are welded directly to either the internal or external pressure retaining surface

of a pressure vessel, the scope of this Division shall include the design, fabrication, testing, and material

requirements established for nonpressure part attachments by the applicable paragraphs of this Division

(see paragraph 4.2.5.6).

c) Pressure retaining covers and their fasteners (bolts and nuts) for vessel openings, such as manhole and

handhole covers.

d) The first sealing surface for proprietary connections, fittings or components that are designed to rules

that are not provided by this Division, such as gages, instruments, and nonmetallic components.

1.2.4 Classifications Outside the Scope of this Division

1.2.4.1 The scope of this Division has been established to identify the components and parameters

considered in formulating the rules given in this Division. Laws or regulations issued by a Jurisdictional

Authority at the location of an installation establish the mandatory applicability of the Code rules, in whole or

in part, within that jurisdiction. Those laws or regulations may require the use of this Division of the Code for

vessels or components not considered to be within its Scope. These laws or regulations should be reviewed

to determine size or service limitations that may be more restrictive than those given here.

1.2.4.2 The following vessels are not included in the scope of this Division. However, any pressure

vessel, with the exception of (a) below, that is not excluded from the scope of this Division by paragraph

1.2.1.2 and that meets all applicable requirements of this Division may be stamped with the U2 Code symbol.

a) Vessels within the scope of other Sections.

b) Fired process tubular heaters as defined in API RP560.

c) Pressure containers that are integral parts or components of rotating or reciprocating mechanical

devices, such as pumps, compressors, turbines, generators, engines, and hydraulic or pneumatic

cylinders where the primary design considerations and/or stresses are derived from the functional

requirements of the device.

d) Structures consisting of piping components, such as pipe, flanges, bolting, gaskets, valves, expansion

joints, and fittings whose primary function is the transport of fluids from one location to another within a

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