Q345B longitudinal welded pipe Q345B longitudinal welded steel pipe.
Product implementation standard: GB T3091 welded steel pipe for low-pressure fluid transportation, GB T13793 longitudinal welded steel pipe.
The yield strength is 345MPa, the tensile strength is 470, and the elongation after break is 18.
Chemical Composition: Carbon: 020, silicon: 050, manganese: 170, phosphorus: 0035, sulfur: 0035, Cr: 030, Nickel: 050, copper: 020, nitrogen: 0012, molybdenum: 010
Special requirements. Negotiated by both parties and indicated in the contract, the following requirements can be selected:
Hydraulic test;Manufacturing precision;
Pipe end status;Removal of internal burrs;
Weight of galvanized layer;
Other requirements. Dimensions, shape, weight and allowable deviations.
Outer diameter and wall thickness.
The nominal outer diameter (D) and nominal wall thickness (Z) of the steel pipe shall comply with the provisions of GB T 21835. According to the requirements of the buyer, after negotiation between the supply and demand parties, the steel pipe of the other size specified in GB T21835 can be used.
The allowable deviation of the outer diameter and wall thickness of the steel pipe shall be in accordance with the provisions of Table 1 and Table 2 respectively. When the contract does not specify the allowable deviation level of the steel pipe size.
At other times, the allowable deviation of the outer diameter and wall thickness of the steel pipe for the idler of the belt conveyor shall be delivered with higher precision, and the allowable deviation of the outer diameter and wall thickness of the rest of the steel pipe.
Delivered to ordinary precision. According to the requirements of the buyer, after negotiation between the supplier and the demander, and indicated in the contract, the steel pipe can be used for the allowable deviation of the specified size.