black Steel Pipe welding oil and gas pipe welding
Instruction of black steel pipe welding oil and gas pipe welding:
Submerged arc welding saw steel pipe: based on the strip coil as raw material, often warm extrusion molding, automatic double wire double submerged arc welding process and welding a spiral seam steel pipe. Submerged arc welding steel pipe.
Features of black steel pipe welding oil and gas pipe welding :
submerged arc welding steel pipe features: straight seam welded pipe production process is simple, high production efficiency, low cost, rapid development. The strength of the spiral welded pipe is usually better than straight seam welded pipe is high, can use a narrow billet production of larger diameter welded pipe, still can use the same width of the billet production pipe diameter different welded pipe. But with the same length of the straight seam pipe, compared to weld length increases 30 ~ 100%, and the production speed is low. Therefore, a small-bore tube welding mostly adopts the straight seam welding, large diameter welded pipe is mostly the spiral welded
Material of black steel pipe welding oil and gas pipe welding:
submerged arc welding steel pipe material: Q235A, Q23b, 0 cr13, 1 cr17, 00 cr19ni11, 1 cr18ni9, 0 cr18ni11nb. Q345 L245 L290 X42 X46 X70 X80
(1) raw materials that strip coil, wire, solder. In the investment before they should pass strict physical and chemical inspection. (2) strip head to tail docking, the monofilament or double wire submerged arc welding, in roll into steel pipe used after automatic submerged arc welding repair welding.
(3) before forming, strip after leveling, shearing, beveling, surface cleaning transportation and to the curved edge processing. (4) the electric contact pressure gauge control conveyor on both sides of the pressure cylinder pressure, ensure the smooth delivery of the strip.
(5) the external control and internal control roll forming.
(6) the weld gap control device to ensure weld gap to meet requirements of welding, pipe diameter, the wrong side of the quantity and weld gap are strict control.
(7) in the welding and welding are the American Lincoln welding machine for monofilament or double wire submerged arc welding, so as to achieve stable welding specification.
(8) after welding the weld all pass online continuous ultrasonic automatic injury instrument inspection to ensure that the 100% of the spiral weld nondestructive testing coverage.
Feafures of black steel pipe welding oil and gas pipe welding:
Submerged arc welding steel pipe features: straight seam welded pipe production process is simple, high production efficiency, low cost, rapid development. The strength of the spiral welded pipe is usually better than straight seam welded pipe is high, can use a narrow billet production of larger diameter welded pipe, still can use the same width of the billet production pipe diameter different welded pipe. But with the same length of the straight seam pipe, compared to weld length increases 30 ~ 100%, and the production speed is low. Therefore, a small-bore tube welding mostly adopts the straight seam welding, large diameter welded pipe is mostly the spiral welded.
Classification of black steel pipe welding oil and gas pipe welding :
Submerged arc welding steel pipe and its standard classification: confined fluid delivery with spiral seam submerged arc welding steel pipe (SY5036-83) is mainly used to transport oil and natural gas pipeline; Confined fluid delivery with spiral seam high frequency welding steel pipe (SY5038-83), with high frequency lap welding welding, used in confined fluid conveying of spiral seam high frequency welding steel pipe. Steel tube confined ability, plastic good, easy to welding and machining molding; General low pressure fluid delivery with spiral seam submerged arc welding steel pipe (SY5037-83), the double automatic submerged arc welding or one side welding legal system into for water, gas, air and steam such as low pressure fluid delivery with submerged arc welding steel pipe. Now submerged arc welding steel pipe common standard general can be divided into: SY/T5037-2000 (targets, also called general fluid pipeline with spiral seam submerged arc welding steel pipe), GB/T9711.1-1997 (GB, also called oil and gas industry conveying pipe delivery technical conditions the first part: A grade steel pipe (up to now have strict GB/T9711.2 grade B steel pipe), API - 5 l (American petroleum.
Specification of black steel pipe welding oil and gas pipe welding :
Outer Diameter | 219 ~3020mm |
Wall Tickness | 2 ~ 30mm |
Length | 5.8m~12m or as per your request |
Standard | API SPEC 5L;GB/T9711.1-1997;BS;EN;DIN;JIS; |
Steel Grade | L245~L485;Gr.B,X42~X80;20#,16Mn,Q235B,Q345 EN10025 S235JR,S355JR; ASTM A53 Gr.B; ASTM A252 Gr.2/Gr.3 |
Manufacturing Technic | Spiral seam double-side submerged arc welding |
Weight | theoretical weight |
Packing | in bulk or as per customer's requirments |
Price term | FOB/CFR/CIF |
Usage | for conveying water,low-pressure fluid,oil,gas,drainage’s transmission,as structure piling pipes,shipbuiding pipes or for Thermal Power Generation etc. |
inspection | by X-Ray or Ultrasonic flaw detecting; Water pressure testing |
testing | Mechanical performance analysis,Chemical composition testing |
We supply all kinds of steel pipes, such as oil and gas pipe welding , Seamless Steel Pipe, Stainless Steel pipes, Alloy Steel Pipes and so on.If you have any need of our pipes, pls feel free to contact me.
Product Categories : Welded Steel Pipe