pipe welding test

- Jun 25, 2019-

pipe welding test

When welding, an invisible force is generated in the weld area.The mechanical term is "welding stress".When welding, the temperature of the welding place is very high, while the temperature of the place without welding is relatively low.(due to the reason of thermal expansion and cold contraction, the internal stress will be generated, so the welding seam annealing process is needed).Even if we use local preheating, welding robot or gas shielded welding, the stress will not be avoided.Steel plate welding for armored vehicles must be at the same level as the steel plate.However, the occurrence of stress will make the strength and anti-fatigue ability of the welding site decline, unable to meet the design requirements.



Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.

Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects

Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555


Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners


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