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Product execution standards: GB/T3091 welded steel pipe for low-pressure fluid transportation, GB/T13793 straight seam electric welded steel pipe.
Yield strength ≥345mpa, tensile strength ≥470, elongation after fracture ≥18.
Chemical composition: Carbon: ≤0.20, Silicon: ≤0.50, Manganese: ≤1.70, Phosphorus: ≤0.035, Sulfur: ≤0.035, Chromium: ≤0.30, Nickel: ≤0.50, Copper: ≤0.20, Nitrogen: ≤0.012, Molybdenum: ≤0.10
Special requirements
It is negotiated between the supplier and the buyer and specified in the contract. The buyer can choose the following requirements: hydraulic test; manufacturing accuracy; pipe end condition; internal burr removal; galvanized layer weight; other requirements. Dimensions, appearance, weight, and allowable deviations
Outside diameter and wall thickness
The nominal outer diameter (D) and nominal wall thickness (z) of the steel pipe should comply with the regulations of GB/T 21835. According to the requirements of the buyer and through negotiation between the supplier and the buyer, steel pipes with sizes other than those specified in GB/T21835 can be supplied. The allowable deviations of the outer diameter and wall thickness of steel pipes shall comply with the provisions of Table 1 and Table 2 respectively. When the contract does not indicate the allowable deviation level of the steel pipe size, the allowable deviations of the outer diameter and wall thickness of the steel pipes used for belt conveyor rollers shall be delivered with higher accuracy, and the allowable deviations of the outer diameter and wall thickness of the remaining steel pipes shall be. Delivery with ordinary accuracy. According to the requirements of the buyer, after negotiation between the supplier and the buyer, and indicating in the contract, steel pipes with allowable deviations in sizes other than those specified are available.
Hunan Gaoxing Steel Development Zone, No.1888 Purui South Rd, Wangcheng District,Changsha, Hunan, China
Tel: 0086-0731-88739521