Upstream oil and gas producers frequently utilize pieces of equipment known as heater treaters (API 12L emulsion treaters) which are vessels that contain liquids produced from wellheads. Heat is introduced to the liquids through the use of a natural gas or hydrocarbon liquid burner that is...
For Division 1 Appendix 1-10 nozzle designs, does the use of Division 2 Part 4.5.14 to satisfy the U-2(g) weld strength requirements (in lieu of UG-41) trigger Code Case 2695, specifically its fabrication tolerance and Manufacturer’s Data Report requirements?
I understand that the D1 1-10...
F.2.3 Step #3 versus Table F-1...huh? Am I missing something or are they poorly written?
I get the 5 times corrosion rate calculated minimum thickness that are cited in the step 3 narrative and the table but I get derailed with the bottom critical annulus (Tb1) and both shell elements (Ts1 &...
I’ve been asked to review the design of a 500 psig MAWP separator having a NPS 12 liquid “sump” that is set on (abutted to) the exterior surface of the main, horizontal, 30” diameter shell. Liquids are communicated to the sump through two 2” diameter holes that are drilled through the main...
Prior to the 2010 edition, in at least the 2003 and 2007 editions, the Brittle Fracture Control and Ductile Fracture Arrest paragraphs were nested in/under paragraph (c) which implies their applicability only when the Fracture Toughness Criterion is triggered. Interpretation 15-5 would seem to...
ASME Section II, Part D, page 82…the materials listed in lines 38 and 39 are both identified as SA-240 304L plate with the same P-No., Group No., min. tensile and yield strengths, and external pressure chart no. Their applicability and max. temp. limits (page 83) are the same except for the...
Example L-1.6 in Appendix L (page 551) cites an equation for a 2:1 ellipsoidal head.
t= PD
2SE+0.4P
Is that equation correct?
I only ask because I have not found it elsewhere in the Code. The equation resembles
UG-32(d)
t= PD
2SE-0.2P
and
UG-27(c)(2) applicable...
I hate to resurrect a topic that’s been utterly beaten to death…but I will. Actually, I more so hate being "that guy” who brings the subject up AGAIN.
It’s the dreaded UW-11(a)(5)(b) paragraph relating to the joint efficiency. Here’s a very specific situation; Non-lethal, non-steam service...
Is it common for professional liability insurance policies to contain bodily injury and property damage exclusions?
I’ve spent over a year convincing my employer that certain services they provide can be considered engineering services and that they need to have properly licensed staff and be a...
I apologize in advance for not being brief but I would appreciate your comments, opinions, or advice.
Late in ’07 and earlier this year my boss (the Engineering Manager, EM) and his boss (V.P. Engineering & Production, VPE&P) collaborated with our outpost business units (in several states) to...
The engineering group I’m in recently became aware of a fairly common practice performed by our production/manufacturing group that spurred an ongoing debate. When needed to make (B31.1/B31.3) piping runs fit, they use a torch to heat the pipe, usually at an elbow, and apply enough force to...
Section 826.2(b) in B31.8 (2003) contains the term "field butt welds" which, to me, implies just that...butt welds that are made in the field (not a shop).
I'm working a design that meets the hoop stress criteria of 826.2 but the welding will be performed in a shop environment. For lack of...
I'm curious as to the different practices used to establish the content of equipment mounting shim packs. The go-to-guy here on the subject offered the following advice:
0.250-inch total made up of
qty. 1 of 0.125-inch SS plate
qty. 4 of 0.020-inch SS shim material
qty. 3 of 0.010-inch SS shim...
I Googled it and got completely different subject matter.
In any case, the term is (probably) slang for a piping/hose fittings used in the automotive and/or industrial engine industry.
Anyone have a clue the purpose they serve or any history on the naming?
Thanks in advance.
Can anyone recommend a mid to high speed reciprocating compressor manufacturer who offers their own performance/rating software along with technical training? My applications will be natural gas gathering and transmission along with CNG and injection.
The 12th edition of the GPSA Data Books contains a example (7-1, page 7-12) for separator sizing and and the mass flow equation has the value 379 in the denominator. The only thing I can figure is that value represents the product of the gas standard specific volume (17.45 ft3/lb) and molecular...
Does the use of UL 758 (AWM) wire prohibit claims of NEC compliance?
I work at a compressor packaging company and am engaged in what is essentially a review our our design and assembly practices. There's generally held belief that our electrical and control systems comply with NEC even though...
Is it a Code requirement that an ASME Sec. VIII Div. 1 pressure vessel design, including fabrication drawings, be performed by an organization holding a valid U-Stamp? The fabrication of said vessel would be performed by a U-Stamped company.
Our vessel assembly shop has outpaced our design...
Does anyone have access to 1956 vintage API-ASME stress values for plate identified as "A-301-B FB?" Of particular interest is the allowable stress at 975 deg. F.
I'm attempting to evaluate a pressure vessel of that era and material but my employer's technical library only goes back to the...
I have a vague memory of having seen information about someone’s product/device that can be used to isolate pressurized piping. No, not a valve; it seems like it was an on-stream blinding device that may or may not have had integral valving.
Am I imagining things or has anyone else run across...
