"Ordering" is the beginning of cooperation between the supply and demand parties. In order for the demand side to obtain steel pipes that meet the requirements of use, and the supplier to produce steel pipes that can meet the demand side's requirements, both parties need to fully communicate and communicate in the "ordering" link.
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, according to the working status and usage requirements of the steel pipe. The working status of the
carbon seamless steel pipe in use: is it used for transportation fluid (including the state and properties of the fluid), or used as a mechanical component, determine whether it meets your own usage requirements.
2. According to the "order 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.
These mainly include:
(1) Steel grade, chemical composition and manufacturing method;
(2) The allowable deviation of the steel pipe shape (outer diameter, wall thickness, length, curvature, ovality, pipe end shape) and its accuracy grade;
(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 provides specific provisions on surface defects of steel pipes, including the type, name, severity of defects, allowable levels 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 the permissible deviations of the ordering specifications 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 the material, and the relevant numerical values of 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 all contents, the orderer will fill in the order form.
7. If it is difficult for the orderer to complete items 4 and 5 above, the orderer should specify the processing method and specific processing requirements of the carbon steel pipe material as well as the processing 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.
Tips: ASTM A53 covers seamless and welded steel pipe (a53 erw pipe) with nominal wall thickness. The surface condition is usually black and hot-dipped galvanized. ASTM A53 is produced mainly for pressure and mechanical applications, and is also used for transport of steam, water, gas line pipes.
