LSAW Steel Pipe-API Certificate, Double Submerged Arc Welded Steel Pipe for Construction/Structure

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
5 m.t.
Supply Capability:
10000 m.t./month

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Product Description:

LSAW Pipe

 

Product Name

LSAW/ Longitudinally Submerged Arc Welded Steel Pipe

Outer Diameter

400-1520mm

Wall Thickness

8mm ~ 50mm

Length

3m ~ 12.3m

Standard/

Steel Grade

API5LPSL1/PSL2Gr.B,X42~X80,ASTMA252Gr.2,Gr.3,ASTMA53Gr.B

EN10217-1,EN10219-1,EN10025 S235JR,S275JR,S355JR, EN10224 L235,L275,L355,DIN 1629 ST37,ST44,ST52

GB/T9711.1-1997,GB/T9711-2011: L245~L555

GB/T3091-2008:Q235B,Q345B,20#,16Mn etc.

Usage

For conveying petroleum, natural gas, coal gas,drainage,

water, chemical material and other medium/low pressure

liquids and used for piling project, electric power projects, heat-supply, shipbuilding & construction projects.

Delivery

Condition

Beveled or plain ends with or without protector or protective caps with or without varnish/2PP/2PE/3PE/ 3PP/FBE external anti-corrosive coating with or without cement mortar/ /Liquid type epoxy resin/ FBE internal anti-corrosive coating as per customer's requirements


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Q:Welded and seamless steel pipe how to distinguish?
Different uses:Mainly used for seamless pipe or structural parts of the transmission fluid, mainly used in machinery industry, and seamed steel pipe is mainly used in the construction industry, such as water, gas, compressed air and low pressure fluid. But seamless steel tubes are used in all pressure pipes.
Q:What does GALV mean in a steel tube?
Steel pipe is not only used to transport fluid and powder solid, exchange heat energy, and manufacture mechanical parts and containers, but also is an economic steel. It can reduce weight and save 20 to 40% of metal by using steel pipe to make building structure, network frame, prop and mechanical support. Moreover, it can realize factory mechanization construction. Using steel pipe to manufacture road bridge can not only save steel, simplify construction, but also greatly reduce the area of coating protective layer, save investment and maintenance cost.
Q:What is the difference between steel pipe and round steel?
The middle of the steel pipe is hollow, and the round steel is solid. When compared with the solid steel such as round steel, the steel tube has the same flexural strength and torsion strengthLight weight, is an economic section of steel, widely used in the manufacture of structural and mechanical parts, such as oil drilling pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction.
Q:Where is a steel pipe casing usually used?
A straight tube of carbon steel sheathed on pipes and tubes and threading tubes to protect the joints from damage by electric welding. The purpose is to protect the wires and cables.
Q:How to identify stainless steel pipe and steel pipe?
Stainless steel (Stainless Steel) is referred to as the stainless steel, the resistance of air, steam, water and other weak corrosive medium or with stainless steel known as stainless steel; while the resistance to chemical corrosion (acid, alkali and salt chemical etching) corrosion of steel called acid resistant steel. Because of the difference in the chemical composition of the two, and make their corrosion resistance is different, ordinary stainless steel is generally not resistant to chemical medium corrosion, and acid resistant steel are generally stainless steel.
Q:What are low-pressure carbon steel tubes?
It's pressure levelThe design pressure (P) of pressure vessel is divided into four pressure levels: low voltage, medium pressure, high pressure and extra high pressure:(1) low voltage: Code L, 0.1MPa is less than or equal to p<1.6MPa(2) MP: Code M, 1.6MPa is less than or equal to p<10.0MPa(3) high voltage: Code H, 10.0MPa is less than or equal to p<100.0MPa(4) high voltage: Code U, P = 100.0MPa
Q:How to distinguish between steel pipe and spiral pipe material?
The alloy tube can be divided into: low alloy pipe, alloy pipe structure, high alloy tube, high strength tube. Bearing tube, heat resistant acid resistant stainless pipe, precision alloy (such as cutting alloy) pipe, high temperature alloy tube, etc..
Q:What is the process of spiral steel tube production?
X ray flaw detection: 100% X ray industrial television inspection of internal and external weld seams, and image processing system is adopted to ensure the sensitivity of flaw detection.8. press test: the steel pipe is tested by root test on the water pressure test machine to ensure the test pressure of the steel pipe to meet the standard requirement.9. chamfering flat head: the qualified steel pipe is processed at the end of the pipe to achieve the required size of the end of the pipe10. final inspection: ultrasonic and X ray inspection, and magnetic particle inspection at the end of pipe to check for welding problems and pipe end defects.11., marking: qualified steel pipe for oil, in order to prevent corrosion, and according to user requirements for marking.
Q:The outer circle of a seamless steel pipe 50 head into the outer circle of the 40 to close
That is, according to the production process of different classification, different from hot rolling (expansion) pipe. In the process of expanding the tube or raw material tube, it is processed by multiple cold drawing, usually on single chain or double chain cold drawn machine of 0.5 ~ 100T. Cold rolled steel pipe (DIAL) in general, steel pipe for low and medium pressure boiler tube, high-pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, oil cracking tube, machining pipe, thick wall pipe, small diameter and cold drawn steel tube also includes other tubes, carbon thin-walled steel, alloy thin-walled steel pipe, stainless steel pipe, special-shaped wall steel pipe. The outside diameter of cold drawn steel tube wall thickness to 6mm, to 0.25mm, to 5mm diameter thin-walled tube wall thickness is less than 0.25mm in size, accuracy and surface quality were significantly better than the hot (expanding) tube, but by the process control, its diameter and length are limited.
Q:Who knows what is the difference between double submerged arc welded pipe and longitudinal submerged arc welding?
The straight seam welding is relative to the spiral welding and the T-shaped welding, and so on.

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