Breakage of Spiral Steel Pipe

Breakage of spiral pipe according to the material after the destruction of anti-corrosion steel case and metal material is substantially the same divided into three types, namely: ① cleavage fracture, ② tie troglobites anti-fracture, ③ slip surface separation fracture.

Cleavage fracture along a section strictly crystal - product surface separating the planes called

cleavage plane. When the fracture along the crystal plane, the theoretical minimum breaking strength. Decision cleavage plane of factors specific surface energy y, the surface of the crystal plane spacing mountains and modulus of elasticity along the normal direction. Cleavage fracture with almost no plastic deformation, is a brittle fracture occurs in the body-centered cubic, hexagonal close-packed gold center. Fcc metals is generally not cleavage fracture occurs. The nature of the genus L ductile material gold sessions, shear fracture is the main fracture mechanism. Such as anti-corrosion steel alloy second phase particles to impede slippage, increasing the resistance to plastic deformation; when the plastic deformation increases, the second phase particles and the matrix interfacial peeling occurs Aung, produce tiny hole; hole formed, grew up with the merger will form a shear section. For high-purity metals, for there is no second phase particles, double metal wear-resistant composite pipe and will not yield: Health and tiny holes, the results of the battle was only shifted along the surface area is increasing, and finally the formation of slip planes separate section. Anti-corrosion steel composite spinning technology under special equipment for precise control, re-pressed wheel rotation and liner friction generates heat quickly reach the softening point of stainless steel, roller squeeze out of the outer tube is elastically deformed, the two create an interference together to achieve closely. From gold session histological point of view, it is divided into the fracture and transgranular fracture along the fracture goods.

How to Properly Stack Spiral Pipe

Spiral pipe stacked right help protect the quality of spiral steel pipe, spiral steel pipe prolong life, prevent deformation, erosion, so orderly stacking spiral steel pipe, but also conducive to late spiral pipe loading, inventory. Spiral Pipe buyers should also strictly in accordance with the requirements of spiral steel pipe pile.

1) Spiral pipe open dumps, following necessary pad with wood or stone, stack surface needs slightly tilted to facilitate drainage, and pay attention to the material placed flat to prevent the causing bending.

2) Spiral pipe principle requires stacking under palletizing firm to ensure the safety of the premise, to do according to species, palletizing specifications, different varieties of materials to palletizing respectively, to prevent muddy and mutual erosion, but also easy to install a library car.

3) Prohibit storage of steel aggressive action items in spiral steel pipe pile position around.

4) Spiral steel pipe pile bottom should be padded, strong, smooth, prevent moisture or material deformation,

5) The same material by successively respectively stacking storage.

6) Sspiral steel stacking height, artificial homework does not exceed 1.2m, mechanical homework does not exceed 1.5m, stack no larger than 2.5m,

7) Be left between the stacks and stacks of certain passages, check road is generally O. 5m, of access depending on the size and material transport machinery, generally is 1.5 ~ 2.0m,

8) Open dumps angles and channels should stoop to put that mouth down, beam shall stand up, you can not be up and groove steel to avoid rusting water.

9) The end of booster stack, if the warehouse sunny cement floor, to elevate O.1m, if the mud shall booster O.2 ~ 0.5m. If it is open space, concrete floor booster 0.3 to 0.5 m, the surface mud booster 0.5 ~ 0.7m.

Spiral Welded Pipe Classification

Spiral Welded Pipe can be applied in different area. Generally, it is widely applied for fluid service, ordinary structure, line pipe and casing. In the steel industry, we classified different steel pipe standards for different application. For detailed classification, please see the table below:

  

Classification	Standard	Main Products
1. Spirl Welded Pipe for Fluid Service	GB/T 14291	Welded pipe for mine fluid sevice
	GB/T 3091	Welded pipe for low pressure fluid service
	SY/T 5037	Spirally submerged arc welded steel pipe for pipelines for low pressure fluid service
	ASTM A53	Black and hot-hipped galvanized welded and seamless steel pipe
	BS EN10217-2	Welded steel tybes for pressure purposes - delivery technical conditions - part2: Electric welded non- alloy and alloy  steel tubes with specified elevated temperature properties
	BS EN10217-5	Welded steel tybes for pressure purposes - delivery technical conditions - part5: submerged arc welded non-alloy  and alloy steel tubes with specified elevated temperature properties
2. Spiral Welded Pipe for Ordinary Structure	GB/T 13793	Longitudinally electric resistance welded steel pipe
	SY/T 5040	Spirally submerged arc welded steel pipe piles
	ASTM A252	Welded and seamless steel pipe piles
	BS EN10219-1	Cold formed welded structural hollow sections of non-alloy and fine grain steels - part1: Technical delivert  conditions
	BS EN10219-2	Cold formed welded structural hollow sections of non-alloy and fine grain steels - part2: tolerances dimmsions and  sectional properties
3. Spiral Welded Pipe for Line Pipe	GB/T 9711.1	Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class A steel pipe)
	GB/T 9711.2	Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class B steel pipe)
	API 5L PSL1/2	Line pipe
4. Spiral Welded Pipe for Casing	API 5CT/ ISO  11960 PSL1	Steel pipe for use as casing or tubing for wells of petroleum and natural gas industries