CODE INTERPRETATION
CODE INTERPRETATION
(OP)
I am encountering 8"std and 22" Sch30 P22 pipe material(P.No.5A Gr.1)to be fabricated under ASME SecI: Boiler Proper at site. The data reports from the boiler manufacturer state that the parts have been fabricated in accordance to ASME SecI: 1998 and Addenda to 1999.
For P22 material, SecI: 1998 has a diameter restriction of < 4" and thickness restriction of <5/8" for PWHT . In SecI:2001, the diameter clause has been DELETED.
Do I have to follow the 1998 code and still do the PWHT or can I get away without doing the PWHT as per 2001 code?
For P22 material, SecI: 1998 has a diameter restriction of < 4" and thickness restriction of <5/8" for PWHT . In SecI:2001, the diameter clause has been DELETED.
Do I have to follow the 1998 code and still do the PWHT or can I get away without doing the PWHT as per 2001 code?





RE: CODE INTERPRETATION
RE: CODE INTERPRETATION
youare okay, but if your completedblr is '01 Ed you may have to HT, your AI will have to interpret and accept it.
ER
RE: CODE INTERPRETATION
It is unclear to me whether you are performing a boiler repair or alteration. In both cases National Board Inspection Code should be checked for PWHT requirements and possible welding procedure in lieu of PWHT.
My advise (rule of thumb) is if you fabricate a new part out of new material and no old (original) material is welded, try to use the new code requirements. If, however the old (original) material is welded that weld should be PWHT.
RE: CODE INTERPRETATION
Building and/or altering a PV to an older version may, in some cases, create situations where the results are unacceptable per the newer version.
All AI apply the latest code version for any work to be performed on a vessel regardless of the year of fabrication of the vessel.
The original fabrication version (contract version) is also often superseded between the contract phase and the fabrication... the latest version usually applies.
HTH
saludos.
a.
RE: CODE INTERPRETATION
Well, I did not invented this, I copied from an article making a lot of sense anditis very interesting for the users.
Good day, ER
Here is:
Paragraph RC-1020 of the National Board Inspection Code (NBIC) states:
“When the standard governing the original construction is the ASME Code, repairs and alterations shall conform insofar as possible to the section and edition of the ASME Code most applicable to the work planned.”
The rules of nearly all North American political jurisdictions require repairs and alterations to be made in accordance with either the NBIC or API-510 Pressure Vessel Inspection Code: Maintenance, Inspection, Rating, Repair, and Alteration. API 510 has provisions similar to those of the NBIC. These Inspection Codes are used worldwide.
RE: CODE INTERPRETATION
The best approach would be to use TODAY'S Code, but the allowable stresses from the original 1980 Code; that would account for (in general), the lower quality of materials available in 1980 vs 2004.
RE: CODE INTERPRETATION
Revisions, except for revisions to material specifications in Section II, Parts A and B, become mandatory 6 months after such date of issuance, except for boilers or pressure vessels contracted for prior to the end of the 6 month period. Revisions to material specifications are originated by the American Society for Testing and Materials (ASTM) and other recognized national or international organizations,and are usually adopted by ASME.
If it takes 3 to 5 years to put up a boiler from start to finish, the Edition and Addenda for the design of the boiler is based upon the signed contract date established between the manufacturer responsible for the design and the owner.
RE: CODE INTERPRETATION