Standard: API SPEC 5L ISO 3183 GB/T 9711.1 GB/T 9711.2 GB/T 9711.3

The material of straight seam pipeline pipe is mainly X42, X46, X52, X56, X70 and the corresponding L series. According to the production process, it can be divided into high frequency straight seam steel pipe and submerged arc welding straight seam steel pipe. Submerged arc welding straight seam steel pipe is divided into UOE, RBE, JCOE steel pipe and so on according to its different forming methods. Straight seam pipeline pipe should do mechanical performance test, flattening test and flaring test, and to meet the requirements specified in the standard. Mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction. For liquid transport: water supply, drainage. For gas transmission: gas, steam, liquefied petroleum gas. For structure: for pile pipe, for bridge; Pipes for wharves, roads, building structures, etc.

API5L B is equivalent to S245(GB/T14164) or L245(GB/T21237)

API5L X42 is equivalent to S290(GB/T14164) or L290(GB/T21237)

API5L X46 is equivalent to S320(GB/T14164) or L320(GB/T21237)

API5L X52 is equivalent to S360(GB/T14164) or L360(GB/T21237)

API5L X56 is equivalent to S390(GB/T14164) or L390(GB/T21237)

API5L X60 is equivalent to S410(GB/T14164) or L410(GB/T21237)

API5L X65 is equivalent to S450(GB/T14164) or L450(GB/T21237)

API5L X70 is equivalent to S485(GB/T14164) or L485(GB/T21237)

API5L X80 is equivalent to S555(GB/T14164) or L555(GB/T21237)

Mechanical properties：

Chemical composition:

Note:

1.0.015% Altot&lt or less; 0.06%; N 0.012% or less; Al/N 2/1 or higher; Cu 0.25% or less. Ni 0.30% or less. Cr 0.30% or less; Mo 0.10% or less

2. V + Nb, Ti 0.15 or less

3. Mo≤0.35% for X60, X65 and X70 after negotiation

Tube standard