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Steel bending pipe calculation and blanking
Before performing steel bending pipework, you must first calculate the unfolded length of the bent section of the pipe and mark the starting point of the bending so that the correct semi-finished product can be obtained after bending. 1. Calculation of 90°bending pipe 90°bending pipe is the most ...Read more -
Daily maintenance is required for thick-walled steel pipes in use
Thick-walled steel pipes are widely used in steel products. It directly affects the economic benefits and the lives of personnel. Countries all over the world have attached great importance to the inspection of thick-walled steel pipes and adopted various non-destructive testing (NDT) methods to ...Read more -
Method of welding steel pipe forming
1.Single radius forming method. The single-radius roll forming method has three types: circumferential bending forming method, edge bending forming method, and center bending forming method. The single radius forming method is: the hole pattern is composed of a single radius, the horizontal rolle...Read more -
Slag inclusion cutting method for straight seam steel pipe
1. Regardless of whether the straight seam steel pipe is rotated or fixed The cutting nozzle should be kept perpendicular to the surface of the straight seam steel pipe. After the cutting is completed, the cutting nozzle is gradually tilted forward at an angle of 70°-80° with the tangent line of ...Read more -
Matters needing attention in use of thick-walled steel pipe
The wall thickness can be called a thick-walled steel pipe. There are some doubts about this. It depends on the ratio of the outer diameter of the steel pipe to the wall thickness of the steel pipe. For example, a steel pipe with a diameter of 50 mm, 10 mm can be regarded as a thick-walled steel ...Read more -
Production process of spiral steel pipe
(1) Raw materials are strip steel coils, welding wires, and fluxes. Strict physical and chemical tests are required before investment. (2) Butt joint of strip steel head and tail, adopt single wire or double wire submerged arc welding, after coiling into steel pipe, adopt automatic submerged arc ...Read more -
Hot rolling and cold rolling technology of seamless steel tube
Seamless steel pipes are made of steel ingots or solid tube billets through the perforation into capillary tubes and then made by hot rolling, cold rolling, or cold drawing. The specifications of seamless steel pipes are expressed in millimeters of outer diameter * wall thickness. Seamless steel ...Read more -
Characteristics of Steel Structure Buildings
1. The material has high strength and is lightweight The steel used in steel structures has high strength and high elastic modulus. Compared with concrete and wood, the ratio of its density to yield strength is relatively low. Therefore, under the same stress conditions, the steel structure has a...Read more -
The difference between hot-dip galvanized steel pipe and cold-dip galvanized steel pipe
Hot-dip galvanizing pipe reacts molten metal with an iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Hot-dip galvanizing is to pickle the steel pipe first. To remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an aqueous s...Read more -
How to solve the deformation problem of spiral submerged arc welded steel pipes
The spiral seam submerged arc welded steel pipe is rotated and drilled and begins to enter the soft formation. Under the action of the three-cone wheel, the drill bit first produces elastic shear deformation of the formation and then is removed under the pressure of the three-cone wheel. In the s...Read more -
Method for preventing quenching cracks of medium and high carbon low alloy steel pipes
(A) If the entire steel pipe is cooled to the martensitic transformation stop temperature (Mf point) or lower by strong water quenching, quenching cracks will occur with high probability. (B) Since the cracks at the time of quenching cracking extend substantially in the axial direction of the ste...Read more -
Features of submerged arc steel pipe
1. The welding process adopted by submerged arc steel pipe is submerged arc welding technology, which uses filler welding and particle protection flux submerged arc. 2. The production process of submerged arc steel pipe includes JCOE forming technology and coil forming submerged arc welding techn...Read more