spiral pipe vent spiral pipe vent Class ii welding seam:1.Girth joint of steel pipe wall;2.Butt weld of water stop ring and stiffening ring and combined spiral pipe vent weld between them and pipe wall.If this kind of weld with ultrasonic inspection sampling rate of 50%, spiral pipe vent quality requirements for B2 qualified.
spiral pipe vent
|Product name||carbon spiral steel pipe|
|Pipe end||bevelled or plain|
|Pipe Length||12 meters|
|Materials||Q235B, Q345, St37-2, St52, SS400, STK500, ASTM A53, S235JR, S335|
|Standard||API 5L, API 5CT, GB/T3091, GB/T9711 EN10296|
|Surface||black painting, 3lpe coating, oiled.|
|Payment term||T/T, L/C, Cash, etc|
|Applications||oil and gas pipe, water pipe, low fluid transportation pipe, steel pilings|
|Certificate||API 5L, ISO9001 2008, ISO14001, OHSAS18001|
Tig spiral pipe vent welding principle introdcutions
After the hot rolled stainless steel coil is formed, an spiral pipe vent arc is generated between the tungsten electrode and the strip to heat and melt the stripThe molten pool is formed for welding, spiral pipe vent spiral pipe vent tungsten electrode, arc region and molten strip are all protected by argon without oxidation.Argon tungsten arc welding features:A) spiral pipe vent due to the argon protection in the welding process, the spiral pipe vent composition of the welding seam is easy to control to ensure the stability of the welding process and high quality of the welding seam.B) the spiral pipe vent temperature gradient in the welding area is very poor, the heating melting and cooling spiral pipe vent crystallization speed is fast, the grain size is large, spiral pipe vent and the columnar direction is bright,After welding, the grain must be refined by heat treatment to improve the mechanical properties of the weld.