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A buried pipe will have a 90deg. bend and a riser coming out of the ground. The steel pipe size can vary (6"-24") and will be buried up to 48" below grade. It needs to have a concrete pad under the 90 deg. bend. I would like to know how I would calculate the dimension of the pad and whether the...

If the yield test(y psi)of the induction bend is lower than the mother pipe(Y psi ), My understanding from ASME B16.49-2007 is that the paragraph 8.1 allows the following procedure. 1 Take the wall thickness of the pipe to which the bend connects (.x inch) 2 Divide the tested yield of the bend...

"all specimens shall exhibit a minimum absorbed energy value of 27 J (20 ft-lbf) for Grade P386 (X386) and lower, and a minimum of 54 J (40 ft-lbf) for grades higher than P386 (X386). Weld metal shall meet an absorbed energy value of 27 J (20 ft-lbf) minimum for all grades" Dear All, The above...

I have seen % shear requirements from 50%, 75% to 85% depending on the code (API, ASTM etc.) and some of the technical papers and vendor specs. The test would be conducted at 32F. So I am confused as to which values are acceptable. The test piece would be from a weld in the tangent area.

ASTM 616 has been replaced by ASTM A996. If the spec calls for ASTM A 616 Gr B, there is no Gr B in A996. Would using grade 60 be ok?

I am reading our spec which states "Vibration tests and acceptance criteria shall be conducted per API 541, except that the overall vibration limits in all directions on the bearing housing shall not exceed 0.03 - 0.05 inches/second peak-to-peak at no load, with the frame bolted to a massive...

I came across a spec referencing IEEE 9444. Searching for the spec on IHS site states that it is discontinued. Two questions, 1. Is there a good substitute for this standard? 2. What are the pifalls of contniuing to use IEEE 944? Thanks.

Do mechanical seals fail gradually (more and more leaking of fluid as days or months go on) or do they fail abrupptly? Thanks in advance

I am reviewing/refreshing specification for Squirrel Cage Induction Motors. It lists various enclosures such as WP II etc. It also lists TEIFG (Totally Enclosed Inert Gas Filled with Water to Air Heat Exchanger) and TEIGC (No Description) enclosures. I have searched NEMA and other motor...

In revising old specs, I have come across NEMA ICS 2-230 and ICS 3-304 specs. I have searched for them on IHS, Techstreet and Google. I find them mentioned in brochures. However, the specs or replacements for them are nowhere to be found. Any help would be appreciated greatly.

I came across this wording. "The ends of bolts, once secure and checked for smooth operation, shall be peened to prevent removal of nuts" I searched the forums here and there are some questions relating to "peening". I am not sure if they are related. I would appreciate any further explanation...

I am updating/re-writing specs. Currently working on flange and piping tolerances. I have come across two separate specs. with two different figures which I have attached. looking at the the figure is causing me some confusion. Axial gap in the flange bolt up tolerance seems excessive and I am...

Our specification for small valves state that cold die stenciling shall not be used. Low stress interrupt dot stamps may be used. Can someone explain what both of the sentences above mean? This specification was written a long time ago.