St37 St52 A214 A178 A53 A423 Galvanized Welded Pipe, ERW

Short Description:

Product presentation:

Hot-dip galvanized pipe is to make the molten metal and iron matrix reaction and produce an alloy layer, so that the matrix and the coating layer are combined. Hot galvanizing is the steel pipe first, in order to remove the iron oxide on the surface of the steel pipe, after pickling, through the ammonium chloride or zinc chloride solution or ammonium chloride and zinc chloride mixed solution tank, and then sent into the hot dip plating tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complex physical and chemical reaction occurs with the molten plating solution of the hot-dip galvanized steel pipe, forming a corrosion-resistant and tight zinc-one iron alloy layer. Alloy layer is integrated with pure zinc layer and steel tube matrix, so its corrosion resistance is strong.

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Product Detail

Product Tags

The process is

Black tube-alkali washing-washing- -pickling-baking paste-water rinse- -immersion aid- -drying- -hot dip galvanizing- -outside blowing- – -inside blowing- -air cooling- -water cooling- -passivation- -water rinse- -inspection- -weighing- -storage.

Galvanized welded steel pipes for low-pressure fluid delivery

1. Uniformity of galvanized layer: the steel pipe sample is continuously impregnated in copper sulfate solution for 5 times without turning red (copper plating color)
2. surface quality: the surface of galvanized steel pipe should have a complete galvanized layer, no uncoated black spots and bubbles, and allow the existence of small rough surface and local zinc tumor.
3. Weight of galvanized layer: according to the requirements of the demander, galvanized steel pipe can be used as the weight measurement of zinc layer, and the average value shall not be less than 500g / square meter, of which any sample shall not be less than 480g / square meter.

Product Detail

Steel Grade:	A214 A178 A423 A513 A53/A53M A672 API 5L APE 3PE Q235 Q345 St37 St52
Standard:	ASME/ASTM SA/A214 A178 A423 A513 A672 A53 A500,A213,A312,A269,A778,A789, GB/T3091 GB/T3094;DIN EN10025; DIN EN10217-2005; BS EN10217; BS EN10219; BS EN10025;
Specification:	OD(1/2″-60″) or Customized
Wt:	1.0-30mm,or according to customer’s special request
Length:	1-20meters,or according to customer’s special request
Package:	Export Standard Package
Pipe ends:	(1)Plain (2)Beveled (3)Threaded with coupling and plastic cap
End protector:	(1) Plastic cap (2) Iron protector (3) as request
Application:	Construction,machine structure pipe, Agriculture equipment pipe,Water and gas pipe, Greenhouse pipe, Scaffolding pipe, Building material tube, Furniture tube, Low pressure fluid tube, Oil pipe, etc.
Mill MTC:	Supplied before shipment
Inspection:	The Third Party inspection can be accepted,SGS,BV,TUV
Mount port:	Any port in China
Trade Term:	FOB,CIF,CFR,EXW,etc.
Price Term:	TT or LC at sight
Our services:	We can customized according to customer’s requriement or drawing ,packaging according to customers’ request