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Dear Respected Members can any help me and share the procedure of PTFE & PFA coating on Diaphragm seal's

thank you

then why in standard the shedule are wriiten saperately for sch 40 & sch40s separately ,it does have some meaning ?please correct me if i am wrong.

Q.What is difference between sch 40 and sch 40S pipe,as both of the dimensions like OD,ID & nominal Thickness are same.?

Impact Test not done for this WPS.

Thank you sir

Thank you sir Q.1- Can any Metallurgy expert clarify the aspect and impact analysis w.r.t to phase change or microstructure changes as per above selected PWHT cycle. Q-2 - As per the ASME SEC VIII there is boundation to go as per WPS ,but as per the same standard ,i think the soaking time is...

Q- As per ASTM E1003-13 "The gauge must be accurate to within 1 % of full scale. The gauge must read at least 1.5× but not more than 4× the maximum test pressure to be used". Is there any standard which can permit me to use pressure gauges more than 4X hydro test pressure . for Ex- 4Xhydro...

thank you, sir please comment on the above attached PWHT cycle.

and what should be the ideal heating Temperature, Heating & cooling rate?? and can I go for furnace PWHT or I should have to go for localized heating?? in addition to this,HIC and h2 teast is also to be conducted and after how much gap of time interval i can go for hardness test,RT ,MT and DPT...

Thank you sir for your response. If I will go through the following cycle 1. Heating Temperature = 95 deg C 2. Heating Rate = 83 deg C /hr 3.soaking rate= 600 dec & 3 Hour 4. Cooling Rate= Furnace cooling . please see the attached image of the drafted PWHT cycle , please share your's comment...

Dear Respected Members and Welding Experts. i have to prepare the PWHT cycle for butt weld A 106 Gr.b Pipe joints and Tee joints with pipe and #300 wnrf flanges (carbon steel)for below section size :- a) 2" sch 160 (t=8.74mm) b) 2" sch xs (t=5.54mm) c) 2" sch 40s (t=3.91mm) As per WPS -...