Longitudinal submerged arc welded steel pipe

- Jan 30, 2019-

Longitudinal submerged arc welded steel pipe






Longitudinal submerged arc welded steel pipewelding seam is termed LASW within the trade.Submerged arc fastening conjointly includes spiral submerged arc welding steel pipe, ring fastening submerged arc welding steel pipe, straight seam submerged arc fastening steel pipe then on.Submerged arc fastening steel pipe has high production potency, low cost, continuous production and low instrumentality needs.






Straight seam submerged arc fastening pipe weld




As shown within the figure below, the fastening seam of arc-welded steel pipe is lengthwise parallel thereto of steel pipe, that is that the fastening seam once rolling and butt welding of plate.Two-side submerged arc fastening means: two-side, two-side fastening, and submerged arc suggests that a sort of post-welding protection live for the fastening seam, and also the flux lowland protection is adopted here.For example, for the fastening of gas welding, and like manual fastening flux coated conductor.Is a quite protection of the weld, the principle is to forestall the recent soften state of metal and alternative components within the air chemical action, thus on shield the standard of the weld nearer to the bottom metal.






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The fastening waste of straight seam submerged arc welding steel pipe shall not be on top of 3mm of the national welding pipe technical customary, the fastening breadth shall not exceed a pair of times of the plate, and also the fastening seam shall not be less than 1mm of the bottom metal.Straight seam submerged arc fastening steel pipe welding seam is removed consistent with the contract needs.






Application field of straight seam submerged arc fastening steel pipe






With the upgrading of kit and also the improvement of parameter performance of production equipment, the standard of welded steel tubes is admire that of seamless steel tubes in several industries. the assembly value of large-diameter straight welded steel tubes is way less than that of seamless steel tubes, and also the production potency is unmatchable thereto of seamless steel tubes.But our country within the alloy high and hot temperature engineering application, still to seamless merchandise.






At present, the foremost wide used steel pipe trade is steel pipe industry.The parameters of structural straight seam submerged arc fastening steel pipe are less restricted, that primarily meet the engineering needs of straightness, bulginess and weld quality of steel pipe.






For example, high customary straight seam submerged arc welded steel pipe like GB/T9711 and API 5L is used for long distance oil and gas pipeline.It undertakes the transmission task of hard-hitting and bad fluid.For example, some components of the east to west gas transmission project in China adopt giant straight seam steel pipe merchandise.


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

 


                                                  Chemical Composition 

Material

C

Si

Mn

P

S

Cr

Ni

201

≤0.12

≤0.75

9.5-12.5

≤0.045

≤0.03

13-16

0.8-1.5

304

≤0.08

≤0.75

≤2.0

≤0.045

≤0.03

18-19

8-10

316

≤0.08

≤1.00

≤2.0

≤0.035

≤0.03

10-14

16.0-18.5

430

≤0.12

≤0.75

≤2.0

≤0.04

≤0.03

16-18

≤0.6