Acceptance procedure of Longigudinally Submerged Arc Welding steel pipe
Straight welded steel tubes shall be submitted for acceptance in batches, and the batch rules shall conform to the relevant product standards.
2.The inspection items, sampling quantity, sampling position and test method of straight welded steel pipe shall be in accordance with the relevant product standards.With the consent of the buyer, the hot rolled seamless straight seam steel pipe can be sampled in batch according to the rolling root array.
3. Longigudinally Submerged Arc Welding steel pipe test results, a does not meet the requirements of product standards, the unqualified should be picked out, and from the same batch of straight joint steel pipe, take double number of samples, reinspection of unqualified items.If the reinspection result (including any index required by the test of this project) is unqualified, the straight welded steel pipes shall not be delivered.The following inspection items are not allowed to be reinspected if they fail the initial inspection: a. there are white spots in low-power tissue;B. microstructure.
4. For the straight seam steel pipes whose re-inspection results are unqualified (including the unqualified microstructure of the preliminary inspection results and the items that are not allowed to re-inspection), the supplier can submit them for acceptance one by one;Or re-heat treatment (re-heat treatment times shall not exceed two times), with a new batch of proposed acceptance.
5. If no special provisions are made in the product standard, the chemical composition of the straight joint steel pipe shall be checked and accepted according to the smelting composition.
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