Our company is engaged in pipeline research and production, by virtue of the company's technology in the pipeline industry and market. Tianjin Henghua soon rise in the domestic market and foreign market.Spiral pipe  welded pipe characteristics: simple production process, high production efficiency, low cost,rapid development. The next ,Let us know the spiral steel pipe from Tianjin Henghua Pipeline Technology Co., Ltd.

STEELANALYSES

HengHua  Spiral Buttweld Pipe is offered as standard in

grades of steel as shown. Variations from these analyses

are also available to meet your specific applications.

BASIC CARBON STEEL (ASTM A-139)

Carbon .30 Max.

Manganese 1.0 Max.

Phosphorus .035 Max.

Sulphur .035 Max.

ABRASION-RESISTANT STEEL

Carbon .30-.35

Manganese 1.00-1.50

Phosphorus. .008-.025

Sulphur .020-.035

Silicon .035 Max.

STRUCTURAL STEEL (ASTM A-252)

Physical Requirements Grade 2 Grade 3

Tensile Strength Min. 60,000 p.s.i. 66,000 p.s.i.

Yield Point Min. 35,000 p.s.i. 45,000 p.s.i.

WEATHERING STEEL (ASTM A-588)

OTHER STEELS AVAILABLE

HengHua  also offers steel grades suitable for your specific

applications, including copper bearing, low-alloy high

strength steels, as well as grades alloyed to meet your

exact requirements.

Spiral welded steel pipe Inspection Technology  

Testing of raw materials - Material leveling test - butt welding inspection - forming test – within-welded inspection – outside-welded Inspection – pipe cutting inspection - Ultrasonic inspection - bevel inspection - Dimensions test --X ray inspection - pressure test - final test