I understand the BPVC has a specific statement regarding the acceptable use SA-312 for use in low temperature applications and no such statement is made in regards to SA-358....and I realize the A-358 spec identifies this material for high temperature and corrosive service, but the B31.3 code...
Moltenmetal, thank you for the response and perspective.
JTE, any chance I can get a preview of the language changes in 6.2.....you have my curiosity tweaked! Also, we have had some questions come up with regard to using the pressure increase procedures listed in PCC-2 for new construction...
We are update our pneumatic testing procedures for B31.3 piping systems to better comply with ASME PCC-2 Article 5, section 6.2 - which is the best defined pneumatic testing procedure I have seen. However, the PSV setting recommendation for PCC-2 is different than ASME B31.3 345.5.2. The...
I think I answered my own question......A234 Section 6.3 states “All welds including welds in tubular products from which fittings are made shall be…(3) radiographically examined throughout the entire length of each weld in accordance with Article 2, ASME Section V with acceptance limits in...
B31.3 has radiography requirements stated in Table A1-b as well as table 302.3.4 in order to increase the weld quality factor for seamed pipe. Do seamed fitting constructed to B16.9 also have to meet the radiography requirement of the longitudinal seam in order to achieve the weld quality factor...
Does anybody know why API STD 526 limits the pressure on some orifice/flange combinations. As an example, a 600#/150# 4X6 "L" orifice constructed out of carbon steel has a pressure limitation of 1,000 psig at 100 F (Table 10), though a 600#/150# 3X4 "K" at 100 F is rated at the full flange...
CVG - would it make any difference if all of the concrete was coming from the same batch plant (consistent mix design) - about 60 miles away. I have seen in other codes (ACI 318) that require testing every 150 cubic yards (assuming you have more than 5 tests for the class of concrete poured). I...
JAE, thank you for the response....I have the second article you provided, and appreciate the link to the first. Your comment regarding "sample" and "cylinder" does put it all into better perspective. I suspect that if I want a 7 and 28 day samples from each truck, I would need to take two...
This question had probably been answered before, but I could not find it in the discussions. C172 seems to indicate that only one sample per truck (revolving drum)is required, but that sample must be made up from two portions, sampled no longer than 15 minutes apart. If this is the case, then...
steris/metengr - thanx for the responses. The information I have does not indicate the plate meets ASTM A300. I will use Curve A, and then proceed to API 579 to get my -20 requirement.
We are moving a vessel to use in a different service (absorber to amine still). The vessel was built in 1965 using SA-212 B Firebox, but does not have a min. temperature stamped on the plate. I believe at that time, the code allowed -20F for this material. Since I am moving the vessel, I...
Can somebody confirm when the change in ANSI B16.5 pressure ratings for flanges occured....we are looking at confirming documentation for process safety info and need to ensure the pressure ratings are appropriate for the code under which they were built.
Thanx.
A question that seems to come up in our company quite a bit is whether or not to weld the circumferential welds when installing a split sleeve. It appears from the B31.8 Appendix I figures that a split T would require the circumferential welds, but the sleeve it is optional to weld. It would...
I appreaciate all the comments and discussion....I did find out that the vessel in question DID have an original "U" stamp.
Here is an excerpt from a NBIC 1992 Addenda that provided some guidance at that time, but from I gather, the NBIC has backtracked from this position (though I have not...
CodeJackal,
This is all taking place in Texas....one of 17 states that have not "included by reference" the various pressure vessel codes (at least, last time I checked).
However, this application is subject to PSM as well as our own internal requirments. Our internal requirements restrict...
