ASME VIII D1 (Interpretação Vol.25)

7/28/2019 ASME VIII D1 (Interpretação Vol.25)

http://slidepdf.com/reader/full/asme-viii-d1-interpretacao-vol25 1/17

Section VIII-1- nterpretations No. 25 VIlI-1-83-2561,lll-1-89-67,lll-1-89-68

Interpretation: Vlll-1-83-256R

Subject:ection VIII, Division 1, Nonmetallicieworts

Datessued: May 31, 1984

File: BC84-030

Question: Are nonmetallic components attached to the first sealing surface of a vessel as ref-

erenced in U-1 (e)(4) and AG-120(d) outside the scope of Section VIII, Divisions 1 and 2?

Reply: Yes.

Interpretation: VIlI-1-89-67

Subject:ection VIII, Division 1, UW-12nd UG-8l(a)

Datessued:ebruary5,989

File:

Question: The ongitudinal seam of a vessel will be welded from the nside using the GMAW

process. After back-gouging and grinding, the seams welded from the outside using the SAW process,

Is this joint considered to be Type No. 1 joint in accordance with Table UW-121

Reply: Yes,


Subject:ection VIII, Division 1, UHA-51

Datessued:ebruary5, 1989

File:

Question (1): May SA-312 welded pipe, conforming to one of the grades given in UHA-Sl(a)

and meetingall requirements of UHA-51, be used at a metal temperature between -20°F and -325°F

without Charpy impact tests?

Reply (1): Yes.

Question (2): May SA-403 WP-W or WP-WX 300 series, welded pipe fittings be used at a metal

temperature between -20°F and -325°F without Charpy mpact tests?

Reply (2): See UHA-51.

37 7

American Society of Mechanical EngineersPYRIGHT American Society of Mechanical Engineers

censed by Information Handling Services



Vlll-1-89-69, Vlll-1-69-70 Section VIII-1- nterpretationsNo. 25

Interpretation: Vlll-1-89-69

Subject:ection Vlll Division 1,CS-85


File:

Question (1): If plates that have been normalized, and qualified on the basis of test specimens

taken from the plates after normalizing, are subsequently heated to equivalent temperatures above

the lower transformation temperature during ot forming, are additional test specimens representative

of the second thermal cycle required by UCS-851

Reply (1): No, provided all other requirements of UCS-85 are met.

Question (2): If plates supplied n the as-rolled condition with qualification based upon simulated

normalizing of test coupons are heated for forming to a temperature within a reasonable tolerance

of that used to qualify the test coupons, are additional test coupons required?

Reply (2): No, provided all the other requirements of UCS-85 are met.


Subject:ection VIII, Division 1, UG-l25(c)

Date Issued:ebruary5, 1989

File:

Question: The 1962 Edition of Section VIII, Division 1, UG-l25(c) states"Al1 unfired pressure

vessels other than unfiredsteam boilers shall be protectedby pressure relief devices thatwill prevent

the pressure rom rising more han 10 per cent above he maximum allowable working pressure,except when theexcess pressure is caused by exposure to fire or other unexpected sources of heat."

The comparable paragraph in the 1986 edition, UC-l25(c)(2), cites the exception to the 10% rule

to be "exposure of a pressure vessel to fire or other unexpected sources of external heat, .,.,,, s the

exception to the 10% maximum pressure rise rule in either the 1962 or 1986 Editions applicable to

a process upset scenario where a pressure increase resultsrom heat causedby an internal exothermic

reaction?

Reply: No.

378

American Society of Mechanical EngineersPYRIGHT American Society of Mechanical Engineerscensed by Information Handling Services



Section VIII-1- nterpretationsNo. 25 Vlll-1-89-71, Vlll-1-89-72, Vlll-1-89-73


Subject:ection VIII, Division 1, UG-93

Date Issued: February 15, 1989

File: BC88-459

Question: A pressure vessel was fabricated and ydrostatically ested, but the Data Report Forms

were not signed nor was the nameplate attached. Due to an emergency, the vessel was then used

for 1 day as an atmospheric storage ank, not as a pressure vessel. May the Authorized Inspector

sign he Data Report Form, and he Manufacturer apply he nameplates after he vessel has been

used as described?

Reply: Yes.




File:

Question:Forahead or shell where he original plates hickness may be reduced rom he

nominal wall thickness to a minimum thickness because of fabrication process, what is the shell wall

thickness that shall be used in determining he area available for reinforcement of an opening in

accordance with the formulas in UG-37.1?

Reply: The minimum specified thickness shall be used in the reinforcement calculations,


Subject:ection VIII, Division 1, UF-7


File:

Question: Is the seal weld at the body/trunnion interface stated in SA-649 paragraphs 1.1 and

4.6 a mandatory requirement for forged steel olls manufactured to the specification andU stamped

in accordance with the requirements of UF-7?

Reply: Yes.

37





Vlll-1-89-74, Vlll-1-89-75, Vlll-1-89-76 Section VIII-1- nterpretations No, 25

Interpretation: Vlil-1-89-74

Subject:ection VIII, Division 1, UG-79nd UCS-79


File:

Question (1): Heads are being fabricated from materials listed in Section I I by a gradual pressing

and spinning process. Does UC-79(a) require any mechanical testingo be performed o demonstrate

the properties of the material have not been unduly impaired?

Reply (11: No.

Question (2): Is it necessary to heat reat ormed heads abricated rom carbon or low alloy

steels?

Reply (2): See the requirements of UCS-79(d).




File:

Question: Do the equirements of UG-10 allow a steel service centet/processor to recertify

material to a permitted specification without furnishing to the customer a copy of the certification

from the material manufacturer (steel mill) containing the chemical analysis performed by the mill?

Reply: No.


Subject:ection VIII, Division 1, UCS-66k)


File:

Question: Closure rings are usedo terminate heating/cooling jacketsn cylindrical vessels. While

these are notANSI 616.5 ferritic steel flanges, they are designed n accordance with the requirementsof this Standard. Are these closure rings exempt from impact heating by UCS-66(c) if they are used

at emperature no colder han -20°F? .

Reply: No.

380




Section VIII-1- nterpretations No. 25 Vlll-1-89-77, Vlll-1-89-78, Vlll-1-89-79

Interpretation: VllI-1-89-77

Subject:ection VIII, Division 1, UG-l16(a)

Date Issued: February 15, 1989

File: BC89-016

Question: If a single working pressure is requiredor desired overa specified working temperature

range, is it pemissible for the nameplate o state the following?

(a) A single “maximum allowable working pressure, PSIG” based on the lessor of a) the

maximum allowable working pressure at he maximum design emperature and b) the maximum

allowable working pressure at the minimum design temperature.

(b) “Working temps F max. and min.” based on the specified working temperature range,

Reply: UG-116 and Fig. UG-118 set forth the requirements for terminology and dual marking

(appropriate abbreviations).


Subject:ection Vlll, Division 1, UHT-34

Datessued:ebruary 15, 1989

File:

Question: For pressurevessel with hemisphericalheads,constructed of UHT materials, with

reference to UHT-34 and Fig. UW-13.1 sketches (I)and (n), can the shell plate center ine be on’

either side of head plate center line.

Reply: Yes; see the note to Fig. UW-13.1 sketches (1) and (n).


Subject:ection VIII, Division 1, UW-26


File: BC89-027

Question: Can a Certificate of Authorization holder subcontract welding operations, within the

controls of UW-26, to a welding subcontractor who does not possess a Certificate of Authorization?

Reply: Yes.

381





Vlll-1-89-80, Vlll-1-89-81, Vlll-1-89-82 Section VIII-1- nterpretations No. 25


Subject:ection VIII, Division 1,A-350

Date Issued:ebruary5,989

File:

Question: May SA-350 be usedas a tubesheet material n a heat exchanger o be fabricated and

stamped in accordance with the requirements of Section VIII, Division 1 1

Reply: Yes.


Subject:ection VIII, Division 1, Form-2


File:

Question: In accordance with Note No. 47 ofTableW-3, if the completed vessel is to be

registered with the National Board,does the U-2 (or U-2A) Partial Data Report Form require he

Authorized Inspector’s National Board Commission number?

Reply: Yes.




File:

Question: For Section VIII, Division 1 construction and certification, if nonmetallic, nonCode

tubes are used in heat exchangers of the fixed tubesheet, floating head or U-tube types, whereby

the operating pressure on the tube side is greater than the operating pressure, fluid and mix effects

on the shell side, but the shell and associated pressure relief devices are designed to withstand the

highest design pressure associated with the tube side, and the outside pressure boundary parts are

treated as a single chambered vessel making UG-19 inapplicable, may such a single chambered vessel

be stamped as complying with Section VIII, Division l?Reply: Yes.

382




Section VIII-1 - nterpretations No. 25 Vlll-1-89-83, Vlll-1-89-84, Vlll-1-89-85


Subject:ection VIII, Division 1, UC-40

Datessued: March 23, 1989

File:

Question: A pressure vessel with an inside shell diameter of 42 in. has a 28 in. diameter circular

opening into which a nozzle wi ll be nserted. This opening is located such that the imits of rein-

forcement measured parallel to the vessel wall will extend to the dished portion of he head. Do

UG-40(a) and (b) permit the limits of reinforcement to extend to the dished protion of the head?

Reply: Yes.


Subject:ectionIII,ivision 1, UG-23

Datessued:March3,989

File:

Question: Do the provisions of UG-23 permit he bending stresses in the vessel wall due to

combination of pressure and earthquake/wind loadings to be ignored?

Reply: No.


Subject:ectionIII,ivision 1, UG-l33(d)

Date Issued: April 6, 1989

File:

Question: UG-l33(d) states”Heat exchangers and similar vessels shall be protected with a re-

lieving device of sufficient capacity to avoidoverpressure in case of an internal ailure.”What

constitutes an nternal failure:

(1) tube eakage;

(2) tube cracking;

(3) tube break; or

(4) multiple tube breaks?

Reply:An internal ailure is a condition hat would lead to anoverpressureof hepressure

boundary.

383





Vlll-1-89-86, Vlll-1-89-67, Vlll-1-89-88 Section VIII-1 - nterpretationsNo. 25



Date Issued: April 6 , 1989

File: BC89-046

Question: The marking required by UG-116 for a pressure vessel is to be applied directly to the

vessel in accordance with UG-118, When the vessel is registered with the National Board and the

"NAT'L BD" number is marked first and above all required ASME markings, is it acceptable to omit

the "manufacturer's serial number" [UC-l16(aM5)] from the fourth ine of the required marking?

Reply: No.


Subject:Section VIII, Division1 1 986 Edition, 1988 Addenda),UHT-l8(b),Recessed Nozzle

Inserts


File:

Question: Do recessed nozzles machined from plate material and similar in detail to Fig. UHT-

18.1 sketch (0 need to comply with Note (2) of Fig. UW-13.3?

Reply: No, Note (2) of Fig. UW-13.3 does not apply to this detail of construction; see U-2(g).

Interpretation: VlIl-1-89-88

Subject:Section VIII, Division1986Edition,988Addenda), UW-38


File:C86-5 19

Question: Does UW-38 prohibit all visible surface porosity in welds?

Reply: The Code has no specific requirements in this regard. The Manufacturer shall establish

workmanship criteria consistent with the material andlor service requirements.

304

American Society of Mechanical Engineers

Services

PYRIGHT American Society of Mechanical Engineers




SectionIII-1 - nterpretations No. 25 Vlll-1-89-89,lll-1-89-90

interpretation: VilI-1-89-89

Subject:Section VIII, Division186Edition,988Addenda), UG-l25(e)


File:

Question (1 : Is a pressure indicating gage as described in UG-l25(e)a mandatory requirement?

Reply (1): No.

Question (2): If a pressure ndicating gage is installed per UG-l25(e), what range should it cover?

Reply (2): The pressure gage should span the set pressure of the relief device and should have

an upper limit between 1.25 imes he set pressure and 2 imes he maximum allowable working

pressure of the vessel.

interpretation: VIlI-1-89-90

Subject:Section VIII, Division11986Edition,1988Addenda),Testingof NDE Personnel

Date Issued: May 10, 1989

File:

Question (11: When a new edition of SNT-TC-1A is referenced by Section VIII, Divisions 1 and

2, must an employer revise his written practice to account for new or revised requirements in the

new edition?

Reply (1): No, These Sections of the Code reference SNT-TC-1A only as a guideleine for estab-

lishing the employer'swritten practice for qualification of NDE personnel; therefore, the manufacturer

should review new editions of SNT-TC-1A to determine whether any revisions effect he written

practice relative to the specific types of examinations being performed.

Question (2): If a written practice for qualification of nondestructive examiners is revised, must

the employer immediately requalify examiners in accordance with the revised practice?

Reply (2): No. Examiners shall be requalified as required by the employer's written practice,

38





vIII-1-89-91, VIII-I-a9-92,IM-I-a9-93 Section VIII-1- nterpretationsNo. 25


Subject:ection VIII, Division1986Edition, 1988 Addenda),UG-20(0


File:

Question:Does UG-20(f)(l) permit only materialsequal to in. or 1 n.nominal hickness to

beexempt rom mpact esting or does it permitmaterialsequal to or less than X in. or 1 in,,

respectively, to be exempt from impact testing?

Reply: P-No. 1, Gr. Nos. 1 or 2 materials of nominal thickness of '/2 in. or less listed in Curve

A of Fig. UCS-66 and 1 in. or less isted in Curve 6, C, or D of Fig. UCS-66 are exempt from impact

testing, provided the requirements of UC-2OQ are met.


Subject:Section VIII, Division 1 (1986 Edition, 1988 Addenda),ube-to-TubesheetWeldsQualification


File:

Question (1): Does Section VIII, Division 1 have requirements or he qualification of welding

proceduresautomaticweldingmachines with rotating headsset up specifically to weld ube-to-

tubesheet welds?

Reply (1): No.

Question (2): Do the rules of SectionVIII, Division 1 prohibit the use of eitherSection 111, Division1, NX-4350 or Section VIII, Division 2, Article F-3 to qualify a tube-to-tubesheet welding procedure?

Reply ( 2 ) : No.


Subject: . Section VIII, Division1 (1986 Edition, 1988 Addenda),UG-46


File:

Question:Are nspectionopenings equired,per UG-46 of Section VIII, Division 1, in tanks

equipped with a heavy duty rubber bladder which is intended to prevent water rom coming in

contact with the steel vessel? These tanks are used for expansion in heating systems,

Reply: Yes.

386





Section VIII-1- nterpretations No. 25 Vlll-1-89-94, Vlll-1-89-95

Interpretation: VllI-1-89-94

Subject:Section VIII, Division 1 (1986 Edition, 1988 Addenda), UG-90(~)(2)

Datessued: May IO,1989

File: BC89-081

Question:Are he equirements of UG-90(~)(2) eingsatisfiedwhenanAI nspects multiple

duplicate vessels for 4 hr on the day shift and 4 hr on the evening shift?

Reply: UG-90(~)(2) stablishes that all Code requirements must be satisfied, but does not detail

the method used to assure such compliance. The method must be developed by the manufacturer

and accepted by the Authorized Inspection Agency, the legal jurisdiction, and the ASME designee.


Subject:Section Vlll, Division 1 (1986 Edition,988Addenda), UG-8

Datessued:May 10, 1989

File:

Question(11 The owner’s specification for a pressure vessel requiresull radiography. The owner’s

specificationalsoallows he abricator to fabricate he shell by usingseamless or weldedpipe

construction conforming o one of he specifications given n Section I I . The pressure vessel fabricator

elected to make the cylindrical shell from welded pipe without filler metal. The pipe was purchased

by the pressure vessel fabricator, and the whole length of the weld joint was not fully radiographed

by the pipe manufacturer. Is the pressure vessel fabricator required to fully radiograph the pipe?

Reply (1): The Committee cannot offer an interpretation of contractual responsibilities.

Question (2): Under what conditions is a pipe manufacturer or supplier required to furnish a

Partial Data Report in accordance with UG-l20(c)?

Reply (2): See Note 3 to UG-8.

387





Vlll-1-89-96; Vlll-1-89-97 Section VIII-1- nterpretations No. 25

Interpretation: VlIl-1-89-96

Subject:Section VIII, Division1986Edition,988Addenda),UG-1 l(b)


File:

Question: A head manufacturer is supplied with a flat, circular welded plate by a Manufacturer

holding a valid Certificate of Authorization. This plate is delivered with aPartialDataReport as

required by UG-120k). This plate is then formed by the manufacturer to the required shape. Must

the head manufacturer supply the purchaser with another Partial Data Report covering the forming

operation or may it be supplied in accordance with UG-1 (b) with the Form U-2 or U-2A furnished

by the Manufacturer supplying the welded plate.

Reply: The formed head may be supplied in accordance with U-2(b)(2) with the Form U-2 or

U-2A furnished by the Manufacturer supplying the plate.

Interpretation: VIll-1-89-97

Subject:Section VIII, Division1986Edition,988Addenda),UG-27


File:

Question: An ERW pipe is butt welded to a 2:l elliptical head forming a single full peneration

joint with a backing strip eft in place or forming a butt joint as specified in Fig. UW-13 sketch (k).

No radiographic examination is conducted on the butt joint, and the pressure vessel will be usedfor

internal pressure without provisions for human occupancy. Is the joint efficiency E in the equations

in UG-27 for:

(a) the circumferential stress equal to 1.00; and(b) the longitudinal stress equal to 0.651

Reply:

(a) No, a quality factor needs to be applied in this case.

(b) Yes.

388

American Society of Mechanical EngineersServices

PYRIGHT American Society of Mechanical Engineerscensed by Information Handling Services



iection VIII-1- nterpretationsNo, 5


Subject:ection VIII, Division1986Edition,988Addenda),UC-93


File:

Question: Is a Manufacturer required y the Code o provide the Inspectorwith a mill test report

for pipe which is to be used as the jacket or shell of a vessel?

Reply: No.


Subject:SectionVIII,Divisions1and21 986 Edition, 1988 Addenda),CodeCase1986-2


File:

Question: Does Code Case 1986-2 limit the remaining wall thickness of a vessel to a thickness

which satisfies the requirements of UC-34(c)(2) and AD-702(a)(2) but not less than 0.25 in.?

Reply: Yes.

Note: This Interpretation also appears in Section VIII, Division 2 as Vlll-2-89-06.


Subject:ection VIII, Division1986Edition,988Addenda),UC-20(f)

Date Issued:' May 10, 1989

File:

Question: If a vessel satisfies all the requirements of UG-20(0, may the vessel be stamped with

a minimum design temperature of -20°F?

Reply: Yes.

389





V111-1-89-101,lll-1-89-102 Section VIII-I - nterpretationsNo. 25

Interpretation: VIII-1-89-101

Subject:Section VIII, Division 1 (1986 Edition, 1988 Addenda), UG-l16(e)(4)


File:

Question (1): A two-piece, 2:l ellipsoidal head is fabricated as a PART and fully radiographed

to the requirements of UW-51. Is the Manufacturer's nameplate marked "RT-1" or "RT-4"?

Reply (1): The part should be marked "RT-4."

Question (2): A shell and ube heat exchanger is fabricated to the rules of this Division. The

shellside is radiographed to the equirementsofUW-51.The ubeside is radiographed to the

requirements of UW-52. Is the Manufacturer's nameplate marked "RT-4" or shell side "RT-I," tube

side "RT-3"?

Reply (2): The vessel should be marked: shell side, "RT-1," tube side "RT-3"?


Subject:Section VIII, Division 1 (1986Edition, 1988 Addenda),BuriedPressureVessels


File:C89-117 .

Question: Mounded storages a system n which cylindrical pressure vessels are aid in a prepared

bed or oundation, and an earth or sand mound is raised around and above he vessels. May the

pressurevesselsused in suchasystembemanufacturedandstamped in accordance with the

requirements of Section VIII, Division 1 or 2?

Reply: Yes; however, see footnote 1 to U-1 in Division 1 and footnote 1 to AG-100 in Division

2 ,

390

American Society of Mechanical Engineers

Services

PYRIGHT American Society of Mechanical Engineers




Section VIII-1- nterpretationsNo. 25 Vlll-1-89-103, Vlll-1-89-104


Subject:Section VIII, Division1986Edition, 988Addenda),SoftSolderedoints


File: BC89-125

Question (1): May soft solder be used to attach extended heat transfer surfaces to the internal

parts of pressure vessels o be fabricated and stampedn accordance with the requirements of Section

VIII, Division l?

Reply (1): The Code does not address the use of soft solder.

Question (2): Are there any service temperature restrictionsor the soft soldered joints described

in Question (l )?

Reply (2): The Code does not address the use of soft solder.

Question (3): May soft solder be used for the joining of pressure parts?

Reply (3): No.


Subject:ection VIII, Division1986Edition,988Addenda),UW-11


File:

Question: May electric resistance welded (ERW) pipe be used as nozzles in a pressure vesselwhose ongitudinal seam is fully radiographed with no radiography on the ongitudinal seam of the

nozzles?

Reply: Yes, provided the reduced allowable stress for the ERW pipe i s used in the calculations

for theozzle,ndherereoerviceestrictionser UW-2. f

39 1




VIII-1-89-105,IlI-1-89-106,lll-1-89-107 Section V111-1- nterpretationsNo. 25


Subject:Section VIII, Division1986Edition,988Addenda), UG-84


File: BC89-158

Question: Do the rules of UCS-66(a) of Section VIII, Division 1 require that the nonwelded end

plates of a plate and frame heat exchanger be Charpy impact tested per UG-84?

Reply: No.

interpretation: VIII-1-89-106

Subject:Section VIII, Division 1 (1986Edition,988Addenda),Appendix9

Datessued:une6,989

File:

Question: Is the material thickness requirement of 194b) applicable to carbon steel piping and

tubing material used for heat transfer and water or steam circulationithin the jacket when attached

by welding?

Reply: No.


Subject:Section VIII, Division11986Edition, 1988 Addenda), Appendix 24,24-2(e)

Date Issued: June 26, 1989

File:

Question: Appendix 24, 24-2(e) states the minimum diameter for bolts and studs shall be X in.

On small clamped connections, a n. diameter bolt appears to be oversized and creates mechanical

interference problems. Can a bolt smaller than X in. be used if calculations and/or testing proves a

smaller bolt is acceptable?

Reply: No.

392





Section ViIi-1- nterpretationsNo. 25 Vlll-1-89-108


Subject:ection VIII, Division 1 (1986dition,988ddenda), UG-32

Datessued:une 26, 1989

File:

Question: May a ormed head with excess thinning be provided with a pad over he area of

interest to meet the required minimum thickness provided the following conditions are met?

(1) a butt or fillet weld procedure qualified n accordance with Section IX is in use;

(2) a telltale hole is provided on the pad; and

(31 the welding is performed by the vessel manufacturer.

Reply: No.

ASME VIII D1 (Interpretação Vol.25)

Documents

Transcript of ASME VIII D1 (Interpretação Vol.25)