Hot Dipped Galvanized Steel Pipe

Hot-dip galvanizing involves three main steps:

Preparation: The galvanizing reaction will only occur on a chemically clean surface, so the first step of the process involves removing contamination. First, the metal is degreased using a caustic solution and then dipped in hydrochloric acid to remove rust, mill scale, welding slag, paint and grease. This followed by a rinse and a dip in a flux solution, which is usually about 30 percent zinc ammonium chloride.

Galvanizing: When the clean iron or steel component is dipped into the molten zinc (at 842°F (450°C)), zinc-iron alloy layers form as a result of a metallurgical reaction between the iron and zinc. When the material is pulled from the galvanizing bath, a layer of molten zinc is present on top of the alloy layer. When it cools, it has the bright, shiny appearance associated with galvanized products.

Inspection: After galvanizing, the coated materials are inspected for coating thickness and coating appearance. A variety of simple physical and laboratory tests may be performed to determine thickness, uniformity, adherence and appearance of the zinc coating.

Quite simply, galvanizing a metal gives it anti-corrosion properties. Without the protective zinc coating, the metal would remain exposed to the elements and potentially oxidize and corrode much faster. Galvanized Steel is a cost effective alternative to using materials such as austenitic stainless steel or aluminum in order to prevent corrosion.

Galvanized steel pipe is a welded steel pipe with a hot-dip or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, and oil heaters and condensation pipes for chemical coking equipment. Pipes for coolers, coal distillation washing oil exchangers, trestle piles, and support pipes for mine tunnels, etc.

Product Parameters

Hot Dip Galvanized Steel Pipe
Size	OD	21.3mm~1620mm(round)
	Thickness	0.5mm-30mm
	Length	1-12m or as per customer's requirement
Surface	Hot dipped galvanized, 20g-275g/m²
Standard	GB/T13793-1992,GB/T14291-2006, GB/T3091-1993,GB/T3092-1993,GB3640-88 BS1387/1985,ASTM A53/A36,EN39/EN10219,API 5L,GB/T9711.1-99 etc
Material	Q195-Grade B, SS330, SPC, S185 Q215-Grade C, CS Type B, SS330, SPHC Q235---Grade D, SS400, S235JR, S235JO, S235J2 Q345---SS500, ST52
Application	Widely used in structure, accessorize,construction, machinery parts,fluid transportation,the stress parts of the automobile tractor parts and so on.
Package	1) Big OD: in bulk; 2) Small OD: packed by steel strips; 3) Plastic bags; 4) According to customer's requirement.
Delivery time	within 7 working days after receiving the deposit
Advantage	1) Reasonable price with excellent quality; 2) Abundant stock and prompt delivery; 3) Rich supply and export experience, sincere service;