How to order seamless carbon steel pipe?

“Order” is the beginning of cooperation between supply and demand. In order to obtain steel pipes that meet the requirements of the buyer and the supplier to produce steel pipes that meet the requirements of the buyer, both parties must fully communicate and communicate in the “ordering” link.

1. Preliminary selection and calibration: The orderer should determine the type of steel pipe, whether it is a seamless carbon steel pipe or a welded steel pipe, according to the working state and use requirements of the steel pipe. The working state of the steel pipe in use: whether it is used to transport fluid (including the state and nature of the fluid), or used as a mechanical component, the name and standard number that the steel pipe should meet, and pay attention to the “scope of application” of the standard. Judging whether it meets your own use requirements as the basis for delivery;

2. According to the “order content” required in the standard (that is, “order content”), first select the shape and size of the required seamless steel pipe, including diameter, wall thickness and length;

3. The clauses in the standard about the technical requirements for steel pipe delivery are the core content of the standard, which determines whether the steel pipe can meet the use requirements of the orderer, and must be fully understood. These mainly include:

(1) Steel type, chemical composition and manufacturing method;
(2) Allowable deviation and accuracy grade of steel pipe shape (outer diameter, wall thickness, length, curvature, ellipticity, pipe end shape);
(3) Delivery status (and its code), including surface status, heat treatment status, final stamping status and metallographic status;
(4) Mechanical properties of steel pipes (including tensile strength, yield strength, elongation, etc.);
(5) Steel pipe processing performance (including bending, flattening, flaring, etc.);
(6) Specific regulations on the surface defect standards of steel pipes, including the type, name, severity, allowable degree after cleaning, roughness requirements of high-precision steel pipes, etc.;
(7) Non-destructive testing of steel pipes (including hydrostatic 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 requirements of the orderer, confirm the manufacturing method specified in the standard, find out the allowable deviation of the order specification size, and select the accuracy level.

5. The ordering party should select the delivery status according to the requirements of deep processing materials on the mechanical properties and processing properties of steel pipes, and confirm the relevant values of mechanical properties and processing properties of steel pipes in this deep processing. The state can guarantee.

6. For the terms in the standard, when the ordering party has requirements beyond the guarantee required by the standard, the “optional” (or separate order) terms can be selected as the guarantee conditions of the agreement, and the order can also be placed after the supplier agrees. Supplementary terms, as a basis for delivery.

7. According to the characteristics of steel pipe products and the specific conditions of storage, transportation, stacking, etc., determine the packaging requirements for steel pipe products.

8. Finally, put forward the order quantity and negotiate with the supplier on the delivery date. After confirming all the contents are correct, the orderer should fill in the complete order form.

9. If the ordering party has difficulty in completing Articles 4 and 5 of this notice, it shall obtain the help and guidance of the sales engineer of the supplier: the ordering party shall explain the post-processing method and specific processing requirements of the steel pipe material, such as the use of this material for processing. Submit the usage requirements of other completed parts (pieces) to the supplier, and the supplier will assist in selecting the delivery state of the steel type, and properly adjust the mechanical properties or processing performance range of the corresponding delivery state, so that the supplier can abide by the agreement . , organize the production of steel pipe products that meet the requirements of the ordering party.