Materials & Welding

Please refer to the Table QW/QB-422 of the ASME Sec IX-2015, IS 2062 (Plate, bars & shapes) are allotted P no. 1 & Group no. 1. Regards On Monday, 29 May 2017 17:37:42 UTC+5:30, George Dilintas wrote: The allocation of a P number to material is done by ASME and by nobody else. If you allocate a P number on the basis of chemical composition them you violate ASME Code Στάλθηκε από το smartphone Samsung Galaxy. -------- Αρχικό μήνυμα -------- Από: Lakshman Kumar B < lakshma...@gmail.com > Ημερομηνία: 29/5/17 08:40 (GMT+03:00) Προς: material...@ googlegroups.com Θέμα: RE: [SOCIAL NETWORK] [MW:26546] ISMB 400 Hi, IS 2062 is Indian standard and we are looking the reference in ASME, and so we can't able to see the correlation at anywhere. Yes – with the help of chemical composition correlation, we can group it to P1. Further if the WPS is only limited for ISMB of IS 2062, then you can specify directly IS 2062 – no need ...

For P no. 1 & 12 mm, the minimum soaking time for PWHT is 29 minutes & same is calculated from one hour per inch. Also please note, the minimum 15 minutes in code, is for only if your value for minimum soaking time(after calculating from one hour per inch for respective thickness) is less than 15 minutes, for eg if you get 14 minutes then you should consider minimum 15 minutes. Regards On Monday, 29 May 2017 15:33:46 UTC+5:30, SWI wrote: Hi Team, Could any please clarify What is the minimum required soaking time for P1 material with wall thick 12mm, as per ASME B31.3 year 2014 Table 331.1.1 . Is it still Minimum one hour per 1 Inch wall thickness or Minimum 15 Minutes... Regards, Ram -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. To unsubscribe from this group and stop receiving emails from it, send an emai...

Ensuring Safe Operation Of Vessels With Quick-Opening Closures   D.C. Perreira   Category: Incidents   Summary:  The following article is a part of National Board Classic Series and it was published in the National Board  BULLETIN . Pressure vessels with quick-opening doors command a great deal of respect from the Boiler Inspection and Insurance Company of Canada (B.I.& I.). We know by simple calculation that a pressure vessel eight feet in diameter with working pressure 150 psi, has an end force of just over one million pounds acting on the heads. This does not worry us unduly in a conventional pressure vessel with welded heads. However, when the head serves as a door and it needs to be held in position by some form of locking mechanism, we have to be more concerned. Brick curing autoclaves, metal bonding autoclaves, autoclaves used in the textile industry, wood treating cylinders, tire vulcanizers, even sterilizers c...

Creep and Creep Failures   David N. French, Sc. D. Category: Operations   Summary:   The following article is a part of National Board Classic Series and it was published in the National Board   BULLETIN .   What is creep? Creep may be defined as a time-dependent deformation at elevated temperature and constant stress. It follows, then, that a failure from such a condition is referred to as a creep failure or, occasionally, a stress rupture. The temperature at which creep begins depends on the alloy composition. For the common materials used in superheater and reheater construction, Table I (see below) gives the approximate temperatures for the onset of creep. It should be pointed out that the actual operating stress will, in part, dictate or determine the temperature at which creep begins. The end of useful service life of the high-temperature components in a boiler (the superheater and reheater tubes and headers, ...

Basic Weld Inspection John Hoh National Board Category: Design/Fabrication Summary:    This article was originally published in the Winter 2010 National Board   BULLETIN   as the second of a two-part series .   This is a continuation of the article   Basic Weld Inspection - Part 1   originally published in the Fall 2009 edition of the   BULLETIN , with more examples and tips the inspector can use as a guide. Some of the items in Part 2 may seem to be outside the realm of weld inspection but, when taken in context with the overall objective, they are relevant.     Note: The purpose of this article is to provide inspectors with a general knowledge of weld inspection. It is by no means intended to compare with the Certified Welding Inspector (CWI) requirements of the American Welding Society (AWS). Part -1: Weld inspection begins long before the first welding ...