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I am designing slurry pieline and need to calculate minimum radiys for roping to ensure stress of the pipeline within its yield strength, pipe size 28" std, 960kpag, 70 dec. C, API 5L Gr. B. I would greatly appreciate if anyone could share your knowledge with me. Regards, Danbury

Could anybody help me on the substitute of gate valve as below? 2" A216 WCB 300#RF API 600 GATE VALVE is to be replaced by 2" A105N 300#RF API 602 GATE VALVE. Any exta procedures are required or technical deviation is to be done? Thanks.

I have a spec. to be developed at 5100 kpa / -29 deg. C through 4330kpa / 215 deg C. (non-steam) per CSA Z662 code. Wall thickness calculation for straight pipe can be done per the formula per para. 4.3.3.1.1 (Z662) I can not find any formula / statement to calculate bend wall thickness. Can...

Thanks to all for your reply. Just wonder if any one has yield and tensile stress for 308 at 1250 F? We have done FEA analysis and noticed that transient stress from cold to hot could reach 36k psi. Thanks again.

See attached pic. for crack. Thanks,http://files.engineering.com/getfile.aspx?folder=4760f5f4-057f-44cf-8b41-2d5bc91bfa4b&file=crack.JPG

Appreciate it if anybody could comment on this below: 300# SO 304H flange welded to 304L pipe by filler material of 308H, cracks observed ai weld joint after temperature cycles 1250F. Can 304H be welded to 304L? is 308H a right filler material? Thanks,

Could anybody recommend any proper full face gaskets to apply to 150# flat face cast iron valve with 150# flat face flange till temperature 400 degree F? Thanks,

I don not think Flexitallic and Garlock produce silicone gasket. I am trying.. Thanks,

Could any one be kind enough to provide me with design factors -"m" & "y" for silicone gasket 60 Shore "A"? I also need suggested seating stress, as well as allowable compressive stress for this gasket material, I contacted a few vendors but none could send out. Strange, is not it? Thanks in advace.

Thanks for your reply. Let us discuss this topic, others are welcome to comment. Torque value is very related to Appx. 2 that calculate Wm1 &Wm2, G, b. I do calculation based on: 1. ASME CODE: Torque=Wm*k*d/(12*Nb), Wm=max(Wm1, Wm2), k=lubrication factor, d= diameter of bolt, Nb=number of bolts...

ASME BPV SECT. VIII, App. 2 limits raised face flange only. Could anybody be kind enough to help in bolt torque calculation for 1). The joint of 150# FF PVC Flange connecting 150# RF steel flange (B16.5) with silicone ring gasket / Bolt A307B? 2). The joint of 150# FF PVC Flanges together with...