Skip to main content

[MW:3703] scope of ISO Recommendations for Boiler Construction...

By Materials & Welding

Hello all,

I have query regarding application A106 specification.

In the old edition of Astm A106 - edition 99 and  latest SA106 specification, there is a clause for Additional requirements of yield strength as per A 520 shall be followed in case the product to be used in application confirming to  ISO recommendations of Boiler Construction.

1 )Can anyone explain me the definition / scope of  ISO recommendations of Boiler construction ?

also. As per current ASTM revisions,  standard A520 has made Obsolete &  the clause of additional requirements for ISO recommended Boiler construction has been removed in revised edition of A106 - edition. 2009.

now to design pipe class according to ASME 31.3 , do I have to consider any additional requirement ?

One of the reply from Lloyds NOBO. was to follow yield strength  as per ASME section II part D table Y-1.

Then for calculations , which allowable stress value shall be consider , ASME 31.3 table A-1  or  ASME Se. II part D, table 1A ?

kindly advise me on the matter.


Kind regards

Rahul

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

[MW:5202] RE: 5200] NDT after PWHT

By Materials & Welding
------------------------------------- Interpretation:  I‑89‑14 Subject:         Section I (1986 Edition, 1987 Addenda), PW‑11,                  NDE Prior to PWHT Date Issued:     December 15, 1988 File:            BC88‑393   Question: Does PW‑11 require that NDE be performed on welds after they have been subjected to the postweld heat treatment required by PW‑39?   Reply: No, unless the conditions described in PW‑11.2.2 exist. ---------------------------------------------- Interpretation:  VIII-1-98-09 Subject:         Section VIII, Division 1 (1995 Edition, 1996 Addenda); NDE                 ...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more