Zinc Coated Seamless Steel Pipe

ZINC COATED SEAMLESS STEEL PIPE

WANLEI offer a wide range of zinc coated seamless steel pipe for fluid and gas project within the following parameters:

Dimensions of zinc coated seamless steel pipe

Outer diameter (OD): 10.3mm to 914.4mm

Wall thickness (WT): 1mm to 60mm

Length (L): 1meter to 12meters

Related standard of zinc coated seamless steel pipe

American standard:

ASTM A53 zinc coated seamless steel pipe

ASTM A795 zinc coated seamless steel pipe

ASTM A106 zinc coated seamless steel pipe

ASTM A500 zinc coated round seamless steel pipe

ASTM A500 zinc coated square seamless steel pipe

European standard:

EN10210 zinc coated seamless steel pipe

EN10025 zinc coated seamless steel pipe

BS1387 zinc coated seamless steel pipe

Japanese standard:

JIS G3454 zinc coated seamless steel pipe

JIS G3452 zinc coated seamless steel pipe

JIS G3456 zinc coated seamless steel pipe

JIS G3466 zinc coated square seamless steel pipe

Surface condition of zinc coated seamless steel pipe

First step, Surface Preparation

When seamless steel pipes arrives at the galvanizing facility, it is hung by wire or placed in a racking system which can be lifted and moved through the process by overhead cranes. The seamless steel pipe then goes through a series of three cleaning steps; degreasing, pickling, and fluxing. Degreasing removes dirt, oil, and organic residues, while the acidic pickling bath will remove mill scale and iron oxide. The final surface preparation step, fluxing, will remove any remaining oxides and coat the steel with a protective layer to prevent any further oxide formation prior to galvanizing.

Second step, Galvanizing

After surface preparation, the seamless steel pipe is dipped in the molten (830 F) bath of at least 98% zinc. The seamless steel pipe is lowered into the kettle at an angle that allows air to escape from pipe shapes, and the zinc to flow into, over, and through the entire piece. While immersed in the kettle, the iron in the seamless steel pipe metallurgically reacts with the zinc to form a series of zinc-iron intermetallic layers and an outer layer of pure zinc.

Third step, Inspection

The final step is an inspection of the coating. A very accurate determination of the quality of the coating can be achieved by a visual inspection. Additionally, a magnetic thickness gauge can be used to verify the coating thickness complies with specification requirements.

Our products of zinc coated seamless steel pipe

Small diameter zinc coated seamless steel pipe

Large diameter zinc coated seamless steel pipe

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