The following are the diameter requirements for LSAW Steel Pipes in different applications:

Oil and gas transportation

Oil pipeline: Generally with a diameter of ≤ Φ 900mm, commonly used diameters include Φ 406.4mm, Φ 610mm, Φ 711mm, Φ 813mm, etc. In some large oil pipelines, larger diameters such as Φ 900mm may be used.

Gas transmission pipeline: The diameter is generally ≥ Φ 900-1200mm, commonly including Φ 1016mm, Φ 1219mm, Φ 1422.4mm, etc. In long-distance and high-capacity natural gas transmission trunk lines, larger diameter pipelines such as Φ 1626mm, Φ 2150mm, etc. may also be used.

Water supply and drainage engineering: In urban water supply and drainage systems, LSAW steel pipes have a wide range of diameters, commonly including DN200 (nominal diameter 200mm), DN300, DN400, DN500, DN600, etc., used as the main pipes of urban water supply networks or large drainage pipelines; In some small-scale water supply and drainage projects, smaller diameter steel pipes such as DN100 and DN150 are also used.

Building structure: In building structures, when used as supporting columns or structural members, the diameter of LSAW steel pipes is usually around 100mm to 600mm, such as 159mm, 219mm, 325mm, 426mm, 530mm, etc., used for frame structures, truss structures, etc; In the support system of building curtain walls, steel pipes ranging from approximately 60mm to 200mm, such as 89mm, 108mm, 140mm, etc., may be used.

Chemical pipeline: For pipelines that transport various chemical media, when pressure and flow requirements are high, large-diameter LSAW steel pipes such as Φ 600mm - Φ 1200mm, specifications such as Φ 700mm, Φ 800mm, Φ 1000mm, etc. are used for long-distance transportation of chemical raw materials or connection between large chemical plants; For some chemical pipelines with low flow and low pressure inside the workshop, steel pipes with diameters ranging from 150mm to 400mm, such as 200mm, 250mm, and 300mm, are also used.

Prices of LSAW steel pipes with different diameters

The price of LSAW steel pipes is influenced by various factors, including raw material prices, production processes, market supply and demand relationships, etc. The prices of LSAW steel pipes with different diameters are roughly as follows:

Small diameter LSAW steel pipe (generally referring to diameter ≤ 406.4mm): usually priced at around 3400-4500 yuan/ton. For example, some LSAW steel pipes with a diameter of about 100-200mm and a wall thickness of 3-6mm, used for building scaffolding, small water supply and drainage pipelines, etc., may cost around 3400-3800 yuan/ton; Steel pipes with a diameter of 300-406.4mm and a wall thickness of 6-10mm, used for urban gas pipelines, etc., are priced at approximately 3800-4500 yuan/ton.

Medium diameter LSAW steel pipe (diameter between 406.4-900mm): The price is generally 3600-5000 yuan/ton. For example, steel pipes with a diameter of 406.4-600mm and a wall thickness of 8-12mm, used for short distance transportation of oil and gas or chemical pipelines, may cost 3600-4200 yuan/ton; Steel pipes with a diameter of 600-900mm and a wall thickness of 10-16mm, used for urban water supply main pipes, etc., priced at approximately 4200-5000 yuan/ton.

Large diameter LSAW steel pipe (diameter ≥ 900mm): The price is usually between 4500-6000 yuan/ton or even higher. Steel pipes with a diameter of 900-1200mm and a wall thickness of 12-20mm, used for long-distance oil and gas transmission trunk lines, may be priced at 4500-5500 yuan/ton; For large-diameter thick walled LSAW steel pipes with a diameter of over 1200mm, used for special projects such as large-scale cross sea oil and gas pipelines, due to the difficulty of production, the price may be above 5500-6000 yuan/ton.