I apply stl6 HFO with PTa on f6a material.
After machining the weld surface, there is no problem. weld surface checked with UT and liquid penetrant method
but after 3-4 days the all weld disbond from surface or seen big cracks.
do you have any suggest.
Hello Dear Friends,
I want to produce a flanged type API 5000 gate valve with 36K material. No any additional end connector top connector or auxalry part only gate valve.
is this acceptable.