View Product General Specification

Size Range
The size range of the spiral weld pipe mill is

Material Grade and Strength
As to range of strength, Byard spiral weld pipe mills will manufacture in conformance to JIS G3444 (Carbon Steel Pipe for General Structural Purposes), G3457 (Are Welded Carbon Steel Pipe for General Piping) and the API standards, ranging from 5LS Gr. B (minimum yield strength of 24kg/mm2) to X-70 (minimum yield strength of 49 kg/mm2). Byard mills will also manufacture spiral-welded pipe for special purposes, such as high strength pipe for low temperature service, pipe for transmission of powders and slurry and abrasion-resistant pipe for subsea dredging.

Quality
Byard spiral welded pipe mills are manufactured under the integrated, rigid quality control systems, which ensure that the quality is highly reliable and stable.

Dimensional Accuracy
Dimensional accuracy is an important factor for pipe for all purpose. Particularly high dimensional is required for pipe for structural uses, since dimensional accuracy is directly related to strength in this pipe. For this reason, it can be said that spiral welded pipe mills can manufacture pipe with good dimensional accuracy (outside diameter, wall thickness, out of roundness, straightness etc.) because of high controlled techniques from coiled skelp rolling to pipe forming and welded.

Strength And Toughness
Our mills can manufacture pipe with high strength and high toughness for low temperature service through well-controlled skelp welding, pipe forming and welding processes. The most outstanding feature of the apperance of spiral welded pipe is that its welded line has a considerable large angle (45-82 degrees) to its axis. It has been proved both theoretically and experimentally that spiral-welded pipe is more advantageous when it is used as pipe forming and welding.

Economy
The production cost for Byard spiral mills is considerably lower than that with any other production method, because Byard mills use high quality hot rolled coils high efficiency hot strip mills, as well as highly automatic high performance pipe forming equipment.

Transmission Use
Pipe manufactured from our SAW spiral mills may be used for the transmission of natural gas and oil, low and medium pressure city gas mains, water supply mains and steam or gas piping in chemical plants and petroleum refineries.
The standards applicable to spiral weided pipe for these piping sevices include:

Structural Use
High strength steel pipe of heavy wall thickness for structural purpose is manufactured on our SAW spiral mill. Spiral welded pipe is used in the largest quantities for such structural purposes, because of the following characteristics:

• Dimensional accuracy, such as in roundness and straightness, is good.
• Non standard sizes (outside diameter, wall thickness etc) are available.
• Any desired length is available. Long lengths (up to 40 metres long) spiral welded pipe can be manufactured without jointing.

The standards applicable to this pipe for these purposes are as follows: