Things To Note When Ordering Carbon Seamless Steel Pipes

Nowadays, carbon steel seamless pipes are extensively applied in the nuclear device, gas conveyance, petrochemical, shipbuilding and boiler industries. In order to allow the demander to obtain steel pipes that meet the requirements of the use, the supplier produces carbon seamless steel pipes that can meet the requirements of the demander. , both parties need to fully communicate and communicate during the ordering process. This article will introduce in detail what to pay attention to when ordering carbon seamless steel pipes.

1. First selection and calibration: The orderer should determine the type of carbon steel pipe, whether it is seamless steel pipe or welded steel pipe, based on the working status and usage requirements of the steel pipe. The working status of carbon seamless steel pipes in use: whether they are used to transport fluids (including the state and properties of the fluids), or used as mechanical components, determine whether they meet your own requirements.

2. According to the "ordering content" required in the standard, select the external dimensions of the required steel pipe, including diameter, wall thickness and length.

3. The clauses in the standard involving technical requirements for steel pipe delivery are the core content of this standard and determine whether carbon steel pipes can meet the requirements of the orderer.

mainly include:

(1) Steel grade, chemical composition and manufacturing method;

(2) Allowable deviations and accuracy levels of steel pipe shapes (outer diameter, wall thickness, length, curvature, ovality, pipe end shape);

(3) Delivery status, including surface status, heat treatment status, pressure treatment status and metallographic structure status;

(4) Processing properties of steel pipes (including bending, flattening, flaring, etc.);

(5) The standard makes specific provisions on surface defects of steel pipes, including the type, name, severity of defects, allowable level after cleaning, and roughness requirements for high-precision steel pipes;

(6) Non-destructive testing of steel pipes (including hydraulic testing, ultrasonic testing, eddy current testing, etc.).

4. According to the different guarantee conditions of different grades in the standard, select the steel type that meets the orderer's requirements. Confirm the manufacturing method specified in the standard, find out the allowable deviation of the order specification and select the accuracy level.

5. The orderer should base on the mechanical properties and processing performance requirements of the carbon seamless steel pipe during deep processing of materials, as well as the relevant valuesof the mechanical properties and processing performance that the steel pipe can guarantee.

6. Finally propose the order quantity and negotiate the delivery date with the supplier. After confirming everything, the orderer will fill out the order form.

7. If the orderer has difficulty in completing items 4 and 5 above, the orderer should indicate the processing method and specific processing requirements of the carbon steel pipe material, as well as the processing process of the material, the use requirements of the finished parts, or the processing performance range and the corresponding The delivery status is submitted to the supplier so that the supplier can organize the production of steel pipe products that meet the orderer's requirements according to the agreed value.