I am trying to build a process loop with He gas as the working fluid. The max working pressure is 35 bar and temperatures at different locations in the process loop vary from 200 C to 900 C. The pipe material is alloy 800HT (UNS N08811). The line size is 1" (Nominal Pipe Size) and sch. 160. I...
Hi,
Thanks everyone for sharing your valuable comments.
Since I don't need to disassemble, I guess welding would be the best option. Also as the working fluid is He gas and is a very small molecule, probably I should avoid flanges in order to have a leakproof joint.
The reason for choosing...
Hi,
Silver goop is a thread sealant that can work up to 815 C. I guess that should take care of that. Pls let me know the compatibility of SS316L fittings with Alloy 800HT pipe. Thanks in advance
Hi,
I am planning to Use alloy 800HT pipe (NPS is 1" and Sch. 160) for a high temp process application (35 bar pre and 650 C temp). However, the pipe threaded fittings (union, tee, elbow etc) that I am planning to use for joining different pipe lengths are of SS316L material. Will it be...
Hi
Thanks for the info. I had talked with a Haynes intnl rep. and he told me that it is approved recently by ASME up to 1800 F. I thought that the data will be availaible in 2004. I am not aware if there is a newer version of code than 2004.
can any one help me out with the ASME allowable stresses (for seamless pipe/tube) for Alloy HR160 (UNS N12160) from 1550 F to 1800 F. I guess they are availaible in the 2004 ASME B&PV Code Section II. I could not get hold of this book. I will appreciate if anyone can post them for me. Thanks in...
I am using two materials, alloy 617 and alloy 253 MA and comparing them to arrive at the suitable material. The values are as below:
For Alloy 617 : @ 1800 F the allowable design stress is 5.03 MPa (0.73 ksi). (value taken from page no 8, table 8 from the technical manual [for Inconel alloy 617]...
Hi,
Kindly read the previous posts (for more details) if you find the details given below are not sufficient
I have a question on Lame' Equation for evaluating the wall thickness of the pipe. I borrowed this equation from process piping ASME B 31.3-1999 edition [Page number 20, equation...
Hi metengr;
Thanks for the info and for suggesting high temp materials.
The pipe is not part of any vessel. As a matter of fact it is a single pipe carrying He gas at such high temperature and pressure. Let me rephrase the entire question
He gas at 950 C and 70 bar (max conditions) will flow...
My question is, how to estimate the wall thickness of SS pipes with He gas flowing in it at conditions of 950 C and 70 bar pressure.
I found that SS310S or 253 MA steels can withstand such high temperatures and pressures. I understand that the design criteria is the creep strength and not the...
