Cangzhou Steel Pipe Group (CSPG) Co., Ltd.

Schematic Diagram Of Production Process Of 3PE Anticorrosive Pipe

PI 5L steel grade (steel pipe grade) L245N and L415Q, L360M and so on L, N, Q, M is what meaning?How is the steel pipe grade divided?

First of all, it is pointed out that the materials at the beginning of L are all national standard materials, which are not the steel grades contained in the American standard API 5L. The material at the beginning of L is the steel grades in GB/T9711 corresponding to the American standard API 5L. L is the abbreviation of LINE and pipeline steel. N, M and Q refer to the delivery state, N is deformation normalizing, M is deformation heat treatment, and Q is quenching and tempering. 245, 415 and so on all refer to yield strength, the specific brand reference can refer to API 5L 44 version or GB/T9711.1, GB/T9711.2.

Because the materials used by each manufacturer are not necessarily the same, the requirements of API standard on steel pipe are different from those of our China. He only requires the performance, and each factory has its own set of specific materials, so there is no completely consistent corresponding table.

E75 → 33Mn2V

x95 → 25CrMo ~ 30CrMo (Mo: 0.15%-0.30%)

G105 → 26CrMo4/s 27CrMo44 28CrMo (Mo: 0.3%-0.5%)

S135 → 27CrMo (Mo: 0.6%-0.8%)

J55, K55 → 37Mn5 36Mn5

N80 → 36Mn2V 33Mn2V

L80 → 13Cr

P110 → 30CrMo

Cangzhou Steel Pipe Group (CSPG) Co., Ltd. No.92 JieFang East Road, Cangzhou City, Hebei, P.R.China.

has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation. 

We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.

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