EN 10208 Standard Welded Steel Tube / Welded Steel Pipe For Pipelines ISO

EN 10208 Standard Steel Pipe for pipelines for combustible fluids

The process by which a flat product is formed into a pipe without heating of the plate or strip.Cold working operation with a permanent strain greater than the maximum strain of 1.5% which differentiates it from sizing operations specified in table. For seamless pipe, the entire pipe; for welded pipes, the entire pipe excluding weld(S) and heat affected zone (HAZ)

Normalizing forming
Forming process in which the final deformation is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing so that the specified values of the mechanical properties are retained even after normalizing.

Quenching and tempering
Heat treatment comprising of quench hardening followed by tempering, where quench hardening implies austenitiization followed by cooling, under conditions such that austenite transforms more or less completely into martensite and possibly into bainite.
NOTE1 By tempering to specific temperature (＜AC1) one or more times or holding at these temperatures, followed by cooling at an appropriate rate, the properties are brought to the required level.
NOTE2 The abbreviated form of this delivery condition is Q

Imperfection
Irregularity in the wall or on the pipe surfaces detectable by methods described in this document
Note Imperfections with a size and/or population density complying with the acceptance criteria specified in this document.
Note Defects are considered to adversely affect or limit the intended use of the product.

ERW piping and manufacturing route (starting material , pipe forming and heat treatment conditions)                 

Chemical composition of the cast analysis

L210GA 1.0319 C 0.21 Si 0.40 Mn0.90 P0.030 S0.030
L235GA 1.0458 C 0.16 Si 0.40 Mn1.20 P0.030 S0.030
L245GA 1.0459 C 0.20 Si 0.40 Mn1.15 P0.030 S0.030
L290GA 1.0483 C 0.20 Si 0.40 Mn1.40 P0.030 S0.030
L360GA 1.0499 C 0.20 Si 0.55 Mn1.45 P0.030 S0.030

Permissible deviations of the product analysis from the specified limits on cast analysis

Element Limiting value for the cast analysis according to Table 2 Permissible deviation of the product analysis
C            ≤0.22                            +0.02
Si           ≤0.55                            +0.05
Mn         ≤1.45                            +0.10
P            ≤0.030                          +0.005
S            ≤0.030                          +0.005
Al           ≥0.015  <0.060             ±0.005
V+Nb+Ti ≤0.15                           +0.02

 Requirements for the result of tensile and bend test and for the hydrostatic test

Torich Interational Co.,Ltd is a professional manufacturer and exporter of steel pipes materials.
It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of Haiyan Sanxin Steel Pipe Co., Ltd. The factories` technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.

Packing

Producing Process