Steel pipes are divided into seamless and welded pipe according to whether there are welds or not. A seamless pipe is a long strip of steel with a hollow section and no seams around it. Welded pipe is a steel pipe made of steel plate or strip steel after being crimped and welded. It has high production efficiency, many varieties and specifications, and less investment in equipment, but its general strength is lower than that of seamless steel pipe.
The delivery length is also called the user's required length or the contract length. The standard has the following regulations on the delivery length:
A. Normal length (also known as non-fixed length): Any length within the length range specified by the standard and without fixed length requirements is called normal length.
B. Length to length: The length to length should be within the normal length range, which is a certain fixed length dimension required in the contract. However, it is impossible to cut out the absolute cut-to-length length in actual operation, so the standard stipulates the allowable positive deviation value for the cut-to-length length.
The production rate of cut-to-length pipes is much lower than that of ordinary length pipes, and it is reasonable for manufacturers to ask for price increases. The price increase range varies from company to company, and generally increases by about 10% on the basis of the base price.
C. Double ruler length: The double ruler length should be within the normal length range, and the single ruler length and the multiple of the total length should be indicated in the contract. In actual operation, an allowable positive deviation of 20mm should be added to the total length, plus a cut allowance should be left for each single ruler length.
If there is no specification for the length deviation and cutting allowance in the standard, it should be negotiated by both the supplier and the buyer and indicated in the contract. The double-length scale is the same as the fixed-length length, which will greatly reduce the yield of the production enterprise. Therefore, it is reasonable for the production enterprise to raise the price, and the price increase range is basically the same as that of the fixed-length length.
D. Range length: The range length is within the usual length range. When the user requires a fixed range length, it must be specified in the contract.
It can be seen that the range length is looser than the fixed length and double length length, but it is much stricter than the usual length, which will also bring a reduction in the yield of the production enterprise. Therefore, manufacturers usually increase the base price by about 4%.
The delivery length is also called the user's required length or the contract length. The standard has the following regulations on the delivery length:
A. Normal length (also known as non-fixed length): Any length within the length range specified by the standard and without fixed length requirements is called normal length.
B. Length to length: The length to length should be within the normal length range, which is a certain fixed length dimension required in the contract. However, it is impossible to cut out the absolute cut-to-length length in actual operation, so the standard stipulates the allowable positive deviation value for the cut-to-length length.
The production rate of cut-to-length pipes is much lower than that of ordinary length pipes, and it is reasonable for manufacturers to ask for price increases. The price increase range varies from company to company, and generally increases by about 10% on the basis of the base price.
C. Double ruler length: The double ruler length should be within the normal length range, and the single ruler length and the multiple of the total length should be indicated in the contract. In actual operation, an allowable positive deviation of 20mm should be added to the total length, plus a cut allowance should be left for each single ruler length.
If there is no specification for the length deviation and cutting allowance in the standard, it should be negotiated by both the supplier and the buyer and indicated in the contract. The double-length scale is the same as the fixed-length length, which will greatly reduce the yield of the production enterprise. Therefore, it is reasonable for the production enterprise to raise the price, and the price increase range is basically the same as that of the fixed-length length.
D. Range length: The range length is within the usual length range. When the user requires a fixed range length, it must be specified in the contract.
It can be seen that the range length is looser than the fixed length and double length length, but it is much stricter than the usual length, which will also bring a reduction in the yield of the production enterprise. Therefore, manufacturers usually increase the base price by about 4%.
