LSAW steel pipe (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

In long-distance pipeline construction, pipe-line account for a large proportion, generally 35% to 40% of line pipe accounts for investment projects' total investment.

How to choose a reasonable price, excellent performance pipe is particularly important to a reasonable choice of pipe to save construction investment, easy construction and safe operation of the pipeline system has a very important influence. Gas Pipelines straight seam steel high-frequency electric resistance welded steel pipe, spiral submerged arc welded pipe, LSAW steel pipe.

Limited frequency straight seam electric resistance welded steel pipe diameter range is generally limited to domestic steel Φ406.4 mm or less, the largest in Japan has reached a diameter of Φ508mm. For large-diameter pipes in the form of a spiral SAW, LSAW has two kinds. Spiral welded steel pipe because of the pipe forming process and characteristics of many shortcomings, the proportion is gradually declining in the long-distance pipeline.

In other countries, especially in many European countries, it has banned the use of spiral submerged arc welded pipe used as the main line pipe. The advantage of its unique LSAW is widely used in long-distance oil and gas pipelines, and its advantages are as follows.

The advantages of LSAW steel pipe are:

1. without the unwind process, the base material indentation scratches less.

2. the wrong side, slotted, and other easy-to-diameter perimeter control, excellent welding quality.

3. the elimination of flaring basically does not exist residual stress after stress.

4. because it is a straight-line weld, the weld is short, with little risk of defects.

5. after expanding, pipe geometry accuracy is improved greatly facilitating the on-site welding.

6. for a straight seam, less impact on the quality of anti-corrosion coating materials.

Cangzhou Shenlong Pipe Manufacturing Co., Ltd. cooperates with Baosteel and Baogang to produce large-caliber seamless steel pipe, straight-seam welded pipe, spiral steel pipe, and pipe fittings. The products comply with API, ASTM, DIN, BS, and JIS standards, and can accept SGS, BV, and other inspections. The products are used in oil, natural gas, bridge, water conservancy, and other large-scale projects, which are worthy of trust.