We are required to weld 550NB (22") diameter API5L GrB pipes with A105 SORF flanges. The Carbon content in the flanges has been resticted to <0.25% for weldability. The method of welding will be normal SMAW with stick electrodes.
My questions are
1. Can we use normal E6013 electrodes?
2...
What is the maximum surface smoothness that can be achieved by simple grinding? Can a finish of 12.5 microns be achieved by grinding with a grinding wheel or is it necessary to use a lathe machine? How does one measure the surface smoothness? Are there any instruments which can give surface...
Can someone direct me to material (preferably online) on this topic. I understand that the National Board has an excellent report on this topic, detailing the "Chinese flange incident" of about a decade ago.What exactly is this 'incident' and how does one get to read this report?
As...
My client wants forged collars for 550NB API5L GrB pipes.( A collar is similar to a flange except that there are no bolt holes. The collars are connected by "quick release couplings")The material specified for the collar is A36.Most of the forging vendors do forging with A105. My...
In designing three plate built up girders are there any guidelines for restricting the maximum leg size of the flange to web fillet weld?The larger the weld size the more difficult it becomes for controlling distortion. The fillet weld is continuous and on both sides. I am looking for rules like...
ASTM specifies 0.35% as the maximum carbon content for A105 material. No minimum limit has been specified. My client has asked for A105 forgings and also specified that C<0.25%. My question is whether it is possible to fulfill both A105 and C<0.25%?
Regards
V.V.vipin
