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Quick Details

  • Standard: GB
  • Standard: GB/T 3091-2001, GB/T 12770-2002, GB/T 12771-2000, GB/T 14291-2006
  • Grade: Q195-Q345
  • Grade: Q235, Q195, Q215
  • Thickness: 6 - 80 mm
  • Section Shape: Round
  • Outer Diameter: 350 - 1420 mm
  • Place of Origin: China (Mainland)
  • Secondary Or Not: Non-secondary
  • Special Pipe: Thick Wall Pipe

Packaging & Delivery

Delivery Detail: 15 - 30 days

Specifications

1. GB/T12771-1991
2. Customer to product evaluation is quite high
3. complete in specifications

Welding steel tube is welded pipe says, is to use plate or strip after curly forming made of steel pipe welding. The welded pipe production process simple, high production efficiency, variety specification, less capital equipment, but generally strength below seamless steel tube. Since the 1930 s, along with the high quality of the rapid development of the strip rolling production and welding and inspection technology progress, weld quality enhances unceasingly, the welding of steel pipe specifications varieties increase, and in more and more field instead of seamless steel tube. According to the form of the welded pipe welding seam welded pipe into straight and spiral welded pipe.

Welding steel tube using the blank of steel and steel strip is, because of its welding process different and divided into furnace welded pipe, electric welding (resistance welding) tube and automatic electric arc welding tube. Because of its form of different welding seam welded pipe into straight and spiral welded pipe two kinds. Because of the shape and aft divided into circular welded pipe and alien (party, flat, etc.) welded pipe. Because of its material welded pipe and use different and divided into the following several varieties:

GB/T3091-1993 (low voltage liquid transportation use galvanized welding steel tube). Mainly used for conveying water, gas, air, and oil, and heating and hot water or steam generally low pressure flow and other purposes tube. Its representatives Q235A steel material level.

GB/T3092-1993 (low voltage liquid transportation use galvanized welding steel tube). Mainly used for conveying water, gas, air, and oil, and heating and hot water or steam generally low pressure flow and other USES tube. Its representatives material for: Q235A grade steel.

GB/T14291-1992 (mine liquid transportation welding steel tube). Mainly used for mine pressure wind, water drainage, shaft put gas in straight seam welded tube. Its representatives material Q235A, grade B steel. GB/T14980-1994 (low voltage liquid transportation with large diameter welding steel tube). Mainly used for conveying water, sewage, gas, air, heating steam and low pressure fluid and other USES. Its representatives Q235A steel material level.

GB/T12770-1991 (mechanical structure with stainless steel welding steel tube). Mainly used in machinery, motor cars, bicycles, furniture, hotel and restaurant decoration and other mechanical components and structure. Its representatives material Cr13, 1, 0, 1, Cr17 Cr19Ni11 Cr18Ni9, 0 Cr18Ni11Nb, etc.

GB/T12771-1991 (liquid transportation use stainless steel welding steel tube). Mainly used to transport corrosive medium low pressure. Representatives for 0, 0 Cr13 material Cr19Ni9, 00 Cr19Ni11, 00 Cr17, 0 Cr18Ni11Nb, 0017 Cr17Ni14Mo2, etc.

Straight seam welded pipe production process 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 blank larger diameter of the welded pipe production, still can use the blank of the width of the same diameter different welded pipe production. But with the same length straight tube, compared to weld length 30 to 100% increase, and production speed is low.

Therefore, a narrow-necked welded pipe most used straight weld seam, large diameter welded pipe mostly using spiral welded.

Added: welded pipe is made of strip steel welding, so it's not in the original position seamless tube high.

Straight seam welded pipe welding steel tube: also called the welded pipe, steel and steel belt is made by bending forming, then by welding is made. According to the weld seam welded pipe form classified as straight and spiral welded pipe. According to the purposes and is divided into general welded pipe, galvanized welded pipe, oxygen blowing weld tube, wire casing, the metric welded pipe, roller tube, deep well pumps tube, automobile tube, transformer tube, electric welding tube, electric welding irregular pipe and spiral welded pipe.

General welded pipe: general welding work to carry low pressure fluid. With Q195A, Q215A, Q235A steel manufacturing. Also can use easy to welding other mild steel manufacturing. Steel pipe must carry on the water pressure, bending, crushed, the surface quality of a certain requirements, usually delivery length is 4-10 m, often required scale (or times feet) delivery. The welded pipe specifications with nominal diameter said (mm or inches) nominal diameter and the actual different, welded pipe wall thickness according to regulations have common steel and two thick steel pipe, steel pipe form and points according to bring threads and don't take thread two kinds, table 6-17 for welding steel pipe size.

[editor this segment] straight tube welding seam

Straight seam welded pipe is a general way to, the way with steel with production, in the high frequency welding equipment straight pipe welding seam call straight tube welding seam. (Because of the steel pipe welding place into a straight line (name). According to the use of different, and different that after the production process. (can be roughly divided into the scaffold tube, fluid pipe, casing, stents, tube, wire fence tube to wait for a few kinds)

And low pressure fluid welded pipe is straight seam welded pipe, and general water, gas transmission, in the welding than normal after the completion of the welded pipe to a more water pressure test, so low pressure fluid pipe than ordinary straight seam welded pipe price a bit higher than the average (according to the present market price is higher than 80 Yuan or so, probably)

 

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