high & low swivel joints

Senoil is focus on high pressure fluid product all the time for years. And working pressure is from 2,000psi to 15,000psi.  Sometimes, we forget that we also can produce low pressure swivel joints which bore size is a little bigger, from 8″ to 12″.  For low pressure swivel joints or straight pipe, we normally weld union or flange to seamless pipe or elbow. For weld process, we do WPS/PQR. For some serious working condition, we do 100% RT to inspect weld result. For swivel style, we always follow FMC. Below is some brief drawing show difference between high and low pressure swivel joints.