Notes on the delivery length of seamless pipes

When purchasing and using seamless pipes, the delivery length is an important parameter that requires special attention. The following are several notes on the delivery length of seamless pipes:

1. Length type

· Fixed length: a specified fixed length, such as 6 meters or 12 meters. Fixed length is conducive to precise construction and avoids waste.

· Multiple length: an integer multiple of the fixed length, usually used in situations where precise cutting is required, but processing allowance should be reserved.

· Unfixed length: the length range is not fixed, and is generally delivered within the range specified by the customer, such as 4-12 meters. Suitable for projects that do not require specific lengths.

2. Standard requirements

Different countries and industry standards have clear provisions on the delivery length of seamless pipes. Common standards such as:

· API, ISO international standards: provide options for unfixed and fixed lengths, and purchase according to actual needs.

· GB/T Chinese national standards: There are also delivery requirements for unfixed, fixed and multiple lengths.

3. Allowance considerations

When selecting multiple lengths, it is necessary to consider the loss during cutting and processing. Usually, a certain allowance is added to the original length to ensure that the finished product meets the requirements.

4. Transportation and storage

Extra-long seamless pipes will increase costs and difficulties in transportation and storage. For pipes longer than 12 meters, special transportation equipment or methods may be required, and logistics issues need to be considered in advance when purchasing.

5. Clear contracts

In the purchase contract, the delivery length must be clearly specified, especially when it comes to fixed length and multiple lengths, to avoid disputes caused by length issues during subsequent delivery.

6. Influence of production process

The production process of seamless pipes may have some restrictions on length. For example, the length of seamless pipes produced by hot rolling is generally shorter, while the cold drawing process can achieve longer pipes. Therefore, when purchasing, the appropriate length needs to be selected according to the process characteristics.

Summary

The selection of the delivery length of seamless pipes should be comprehensively considered in combination with project requirements, transportation conditions, standard requirements and production processes. Clearly specify the delivery length in the contract to ensure smooth procurement and delivery of seamless pipes.