Thanks for your feedback guys !!
@ TVP - Refering to the datasheet Rolled Alloys & NSalloys , These are produced to API6A 718 which doesn't resolve the issue because of lower mYs in comparison to ASTMB637.
@ EdStainless - You are correct and I am failing to convince the end-user because many...
Zdas04,
These are true full bore and ball are inline for pigging applications.
I guess sizes are limited to 8" 2500# full bore with manufacturer.
I can send some literature , if u wish!!
Regards,
Aamir
DBB are recommended when you require 2 independent ball valves for positive Isolation during Hot work or downstream works.
A bleed valve is incorporated between the 2 block valve to ensure that, the isolation is secure and men can work satisfactorily.
A DBB (Double Block & Bleed valve) which has 2 x Ball valve can used to suit your requirement.
These DBB comply to ANSI B16.10 Face to Face Sizes while providing double-block-bleed. Apparently, Oliver Valves has a DBB pig launcher and receing system which has minimal foot print.
Regards,
Aamir
Gents,
Is it possible to produce ASTM B637 UNS N07718 with the hardness requirements of NACE ?
As per ASTM B637 the MIN hardness is 38 HRC and NACE calls for MAX hardness of 40 HRC. Thus, NONE of the manufacturer (including Special Metals who are the inventor themselves) are ready to supply...
