ASTM A500 Steel Pipe GI steel tube

ASTM A500 Steel Pipe GI SCH 40 steel tube

Galvanized steel pipe welded joint

Gi pipe Welded Steel Pipe chemical composition.

The steel plate and chemical composition of galvanized steel tube shall conform to the brand and chemical composition of the Steel Pipe used in GB/T3092.

2. Manufacturing method

The manufacturing method of Galvanized Iron Pipe (furnace welding or welding) is selected by the manufacturer. Hot dip galvanizing method is adopted.

3. Thread and pipe joint.

(a) galvanized gas pipe with thread, thread should be made after galvanized. Thread should comply with YB 822.

(b) steel pipe joints shall conform to the provisions of YB 238; The joint of malleable cast iron pipe shall conform to the provisions of YB 230.

4. Mechanical properties of steel tube before galvanization should comply with GB 3092.

5. The uniform Galvanized Steel Pipe shall be tested for the uniformity of galvanized layer. The steel tube samples were impregnated 5 times in the copper sulfate solution without turning red (copper plating).

6. Cold bending test nominal diameter of no more than 50mm galvanized steel pipe shall be subjected to cold bending test. Bending Angle is 90 °, bending radius to diameter 8 times. When the test is not filled with filler, the weld should be placed on the outside or upper part of the bending direction. After the test, there should be no crack and zinc peeling.

7. Water pressure test should be carried out in Galvanized Gas Pipe, and eddy current test should be used instead of water pressure test. Test pressure or eddy current testing should be in accordance with GB 3092. The mechanical property of steel is an important index to ensure the final performance of steel.

Specification:

Size	OD	1/8" -24" (5.15mm-714mm)
	Wall Thickness	0.4mm-26mm Class A-1, Class A, Class B, Class C, SCH20,SCH40,STD,XS,SCH80,SCH160,XXS
	Length	5.8M Length, 6M Length or 12M Length or as requested
Steel material	Q195 → SS330,ST37,ST42 Q235 → SS400,S235JR Q345 → S355JR,SS500,ST52
Standard	ASTM A53, BS1387-1985, GB/T3091-2001,GB/T13793-92, GB/T6728-2002
Zinc Coating:	120g,270g,400g,500g,550g 20μm ,40μm ,60μm,70μm,80μm
Usage	1)low pressure liquid, water, gas, oil, line pipe 2)construction 3)fence, door pipe
Ends	1) Plain 2) Beveled 3) Thread with Coupling or cap 4) Chamfer 5) Groove 6) Screw
End protector	1) Plastic pipe cap 2) Iron protector
Surface Treatment	1) Bared 2) Black Painted (varnish coating) 3) Galvanized 4) Oiled 5) PE,3PE, FBE, corrosion resistant coating, Anti corrosion coating.
Technique	Electronic Resistance Welded (ERW ) Electronic Fusion Welded (EFW) Double Submerged Arc Welded (DSAW)
Welded Line Type	Longitudinal
Section Shape	Round
Inspection	With Hydraulic Testing, Eddy Current , Infrared Test
Packaging	1) Bundle, 2) Plastic waven Bags
Shipping	1) 20'Container 2) 40' Container 3) Bulk carrier
Port of Shipment	Xingang Port, Tianjin, China
Date of Delivery	20 days after confirmation or According To The Quantity And Specification Of Each Order
Payment	L/C, T/T, DP

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