SSAW steel pipe is made of strip coil, welding wire and flux. Before forming, the strip is leveled, trimmed, planed, cleaned and transported on the surface, and bent. The weld gap control device is used to ensure that the weld gap meets the welding requirements. The pipe diameter, misalignment and weld gap are strictly controlled. After cutting into a single steel pipe, the first three of each batch of steel pipes are subject to strict first inspection system, in order to check the mechanical properties, chemical composition, fusion state and surface quality of the weld, as well as through non-destructive testing to ensure that the pipe manufacturing process is qualified, it can be formally put into production.
According to the purpose of welding steel pipe can be divided into general welding pipe, galvanized welding pipe, oxygen blowing welding pipe, wire casing, metric welding pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin wall pipe, welding special-shaped pipe and spiral welding pipe. Welded steel pipe according to end shape can be divided into circular welded pipe and irregular (square, flat, etc.) welded pipe.
General Standard and Application of SSAW Steel Pipe | ||
S.N. | Standards | Application |
1 | ASTM A134 | Electric-Fusion (Arc)-Welded (Sizes NPS 16 and Over) Steel Pipe |
2 | ASTM A139 | Electric-Fusion (Arc)-Welded Steel Pipe (NPS 4 and Over) |
3 | ASTM A381 | Metal-Arc-Welded Steel Pipe for Use With High-Pressure Transmission Systems |
4 | ASTM A671 | Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures |
5 | ASTM A672 | Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures |
6 | ASTM A691 | Carbon and Alloy Steel Pipe Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
7 | EN 10208-1 | Steel Pipes for Pipelines for Combustible Fluids-Pipes of Requirement Class A |
8 | EN 10208-2 | Steel Pipes for Pipelines for Combustible Fluids-Pipes of Requirement Class B |
9 | EN 10217-1 | Welded Steel Tubes for Pressure Purposes-Non-alloy steel tubes with specified room temperature properties |
10 | EN 10217-2 | Welded Steel Tubes for Pressure Purposes-Electric Welded Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties |
11 | EN 10217-3 | Welded Steel Tubes for Pressure Purposes-Alloy fine grain steel tubes |
12 | EN 10217-4 | Welded Steel Tubes for Pressure Purposes-Electric Welded Non-alloy and Alloy Steel Tubes with Specified Low Temperature Properties |
13 | EN 10217-5 | Welded Steel Tubes for Pressure Purposes-Submerged Arc Welded Non-alloy and Alloy Steel Tubes with Specified Elevated Temperature Properties |
14 | EN 10217-6 | Welded Steel Tubes for Pressure Purposes-Submerged Arc Welded Non-alloy Steel Tubes with Specified Low Temperature Properties |
15 | EN 10224 | Non-alloy Steel Tubes for the Conveyance of Water and Other Aqueous Liquids |
16 | EN 10255 | Non-alloy Steel Tubes Suitable for Welding and Threading |
17 | EN 10288 | Steel Tubes and Fittings for Onshore and Offshore Pipelines |
18 | EN 10296-1 | Welded Circular Steel tubes for Mechanical and General Engineering Purposes-Non-alloy and Alloy Steel Tube |
19 | DIN 30670 | Polyethylene Coatings on Steel Pipes and Fittings |
20 | SY/T 0413 | Polyethylene Caoting for Buried Steel Pipeline |
21 | ISO 3183 | Steel Pipe for Pipelines Transportation Systems |
22 | API 5L | Specification for Line Pipe |