Largest Oil and Natural Line Pipe .Bubbles occur in the weld pass, the main reason is that hydrogen is still hidden in the form of bubbles in the weld metal, so, the measure of this defect is the first must wire and weld rust
|Out diameter||219.1mm -1820mm (8” -72”)|
|Wall Thickness||5.0 -50mm|
|Length||up to 30m|
|Standard||API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711|
|Certificate||API 5L PSL1 / PSL2, API 5CT|
|API 5L: GR B, X42,X46, X56, X60,X65,X70|
|Surface Treatment||Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement |
|Test||Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.|
|Mill Test Certificate |
Largest Oil and Natural Line Pipe occur in the weld pass, the main reason is that hydrogen is still hidden in the form of bubbles in the weld metal, so, the measure of this defect is the first must wire and weld rust, oil, water and moisture and other substances, followed by a good drying flux to remove moisture.In addition, it is effective to increase the current, reduce the welding speed and slow down the solidification rate of molten metal.Generally, the accumulation thickness of flux is 25-45mm. The Largest Oil and Natural Line Pipe accumulation thickness of flux with large particle size and small density takes the value; otherwise, it takes the small value.High current, low welding speed, accumulation thickness value, otherwise take Largest Oil and Natural Line Pipe a small value, in addition, summer or air humidity is large, recycled flux should be dried before use.Sulfur crack (sulfur crack).A crack caused by the inclusion of sulfide in the sulfur segregation zone into the weld metal when welding a plate with a strong sulfur segregation zone (especially soft boiling steel).The reason is the presence of hydrogen in iron sulfide and steel with low melting point in the sulfur segregation zone.
Certifications of product
The Packing Process Flow
The Packing Process Flow
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.
Why to choose us?
1.We provide products to our customers individual specifications and special needs with competitive price and best service.
2. Immediate respond
We will be 24/7 on line at your services. Provide one-to-one service with our sincerity.
3. Professional suggestions
We could provide you the professional suggestion with our expertise acumen.
4. Short delivery period
We are based on a long-term cooperation with several major domestic steel company with an outstanding advantage is sufficient supply. Shorter the supplying period.