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I have a short section of piping that needs to connect two flanged valves. Because of space constraints, I am planning to weld two stub ends together.. Is that allowed per ASME B31.3? https://files.engineering.com/getfile.aspx?folder=b2722345-8dc1-47a7-b44b-603a32100df4&file=Stubend.PNG

Hi all, I am designing a gas header for a ground flare. Applicable code of design is B31.3 & hydrotest will need to be conducted. Is there an option in B31.3 to hydrotest the header in undrilled condition and later after hydrotest drill the distribution holes? Thanks in advance!

Hi all, I am designing a gas distribution header, for a flare, with numerous holes connected to burners. System operates around 20psi. Can i take exception to hydrotest under B31.3 - 345.1 (d) as system is open to atmosphere. There are valves upstream to isolate the burners. I need to install...

Hey everyone, Need some advice on gasket dimensions for a 12" wafer-style butterfly valve connecting to a 12" B16.5 flat face flange. It's for an air line from a 10psi blower. Any insights on the ideal dimensions? Also, what adjustments are needed if I switch to an RF flange? Similarly, facing...

Hi I am connecting a 12" wafer check valve with a 12" ANSI 150 RF flange. I need to use a custom gasket between these. How do I determine the dimensions of the gasket?

Hi all, I am constructing a fuel gas line (25psi) and confused with pressure testing of pipe. Can I do shop hydrotest instead of pressure testing and assemble the parts at site? NFPA 54 Cl 8.1.2 (given below) doesn't mention hydrotest. "Test Medium. The test medium shall be air, nitrogen...

Is there any piping specification equivalent to A36?

Hi What care to be taken while installing secondary steam separator (vane type inside box) in SG? Whether arc strike / spatter allowed on vane elements? What are the possible damages in operation ? Any literature would immensely help. Thanks in advance

Hi.. In a header assembly of diff thickness/size materials; which has to be heat treated inside a furnace, how to determine the cooling rate.? How the code addresses deviations in cooling rate / heating rate? Any code references pl.

I have a section 1 pipe, where holes are drilled hill side. How do i calculate ligament efficiency for this design for calculation of min thickness? http://files.engineering.com/getfile.aspx?folder=5ac561b4-9176-4940-8e99-6f727be3e325&file=CaptureS.JPG

Hi all What is the purpose of relief groove in flat heads? How to determine the size of relief groove for various design conditions/sizes? In case of a plug type flat end cover, which is inserted into the id of a pipe and welded, why no relief grooves are provided?

Hi Is there any difference between SA213TP316 & SA312TP316 except in tolerances? Can one be substituted with other technically, if wall tolerance is not an issue of concern?

Whether silencer in boiler vent piping to be considered as a pressure part component? If so, which calculation is to be performed as per which code? What is ASME disposition, regarding same?

There is a formula given dmax = 8.08[Dt(1-K)]^1/3 in ASME BPVC Section I PG32. How this formula is derived? Again, in 2007 version, a curve was given to find out dmax, which is now replaced by this formula. Can I explain the background of this formula pls? Thanks in advance

can anyone provide a sample calculation for shell, pipe, tube, nozzle reinforcement, dished end, flat end etc for a boiler designed as per en 12952..? any link to any website or pdf pls share.. thanks

Hi I have seen these 2 specs in ASME Section IIA. There is not much difference in composition between these two. But there is a difference in tensile and yield strength values? For CL1, section II D gives a detailed allowable stress value for various temperatures, but for CL2 it is absent My...

Hi In ASME Section I PG 27 & ASME Sec I non mandatory appendix A-317, formula for calculation of thickness is given. When A317 needs to be applied? Can anybody explain how A317 formula is developed? Kindly clarify.

Hi Whether deaerator of a power plant is a pressure part or not? If so, whether ASME recognizes it ? In the code jurisdiction diagram given, it is not clear whether it needs to be considered in boiler proper or not? What are the general standards to which deaerators are made, if not ASME? In...

Hi all I know ASME BPVC is globally accepted boiler/pressure vessel design code in all countries. But I am in the process of making a list of local statutory codes to be followed while designing boiler/pressure vessel in various countries. Can anyone give me such a list or post the relevant...

Hi Due to an erection mistake, I have some tubes coming in boiler secondary air gas path. What will be the effect, if I dont want to modify it? Hardly 4 tubes of boiler wall,(approx 50mm length is exposed) Air velocity is around 60m/s and at 250 deg c Tube is cooled by water-steam mixture as...