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Structural Fire Steel Pipe Galvanized Round Tube Pipe

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Structural Fire Steel Pipe Galvanized Round Tube Pipe

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Model No. :	Q195, Q215, Q235, Q345
Brand Name :
standard :	Api,Jis,Astm,Gb,Bs
Material :	A53-A369,Q195-Q345,St35-St52,Cr-Mo Alloy
Section shape :	Round
place of origin :	China
application :	Fluid Pipe,Structure Pipe
Production Process :	Cold Rolled
Certification :	Api,Ce
Surface treatment :	Galvanized
Special tube :	Api Pipe
Whether alloy :	Non-Alloy
tolerance :	±1%
Category :	Seamless Steel Pipe
Processing Service :	Cutting,Punching,Decoiling,Bending

0yrs

Tianjin, Tianjin, China

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Trade Company

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Tianjin Yòufā Steel Co., Ltd

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Product description

Product Introduction

Galvanized steel pipe is a kind of carbon steel pipe, mostly welded pipe, Galvanized steel pipes are divided into cold galvanized steel pipes (electro galvanized steel pipes) and hot-dip galvanized steel pipes. At present, hot-dip galvanized steel pipes are mainly used in fire protection, electric power and highways.

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 water transmission, gas, oil and other general low-pressure fluids, they are also used as oil well pipes and oil transmission pipes in the petroleum industry, especially in offshore oil fields, as well as pipes for oil heaters, condensing coolers, coal distillation oil washing exchanges of chemical coking equipment, as well as trestle pipe piles, support frames of mine tunnels, etc.

Hot-dip galvanizing (HDG), as referenced is the process of dipping fabricated steel into a kettle or vat of molten zinc.

Hot-dip galvanizing (HDG) is the process of coating iron, steel or ferrous materials with a layer of zinc. This done by passing the metal through molten zinc at a temperature of 860°F (460°C) to form zinc carbonate (ZNC03). Zinc carbonate is a strong material that protects steel and can prevent corrosion in many circumstances. Hot-dip galvanizing can be carried out cheaply and in large batches.

Galvanized Steel Pipe

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 Specification

Product name	Hot Sale Prime Quality Galvanized Pipe
Material	Q235, Q345, S235JR, S275JR, SS400, A36, St37-2, St52-4, STK400, STK500, S355JR, GR.B-D.....
Surface Finish	Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.
Shape	Round /Square /Rectangular
Outer Dia (mm)	21.3-165mm/ 1010-600600mm/ 1020-800400mm
Wall Thickness (mm)	0.5-2.5 to 1.5-5.5/ 0.4-27mm/ 0.4-27mm
Length (mm)	5800 or 6000/ 6M or customized
Surface Treatment	1)Black, Pre-galvanized
	2)Oiled, powder coating
	3)Galvanized as your requirement
	PS:Pre galvanized steel pipe: 60-150g/m²
	Hot dipped galvanized steel pipe: 200-400g/m²
End Finish	Plain/ beveled ends or threaded with sockets/ coupling and plastic caps.
Packaging	Packing in bundle with steel strips; with seaworthy package at the end; could be done with your requirement.
Inspection	With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test, Dimensional and Visual Inspection, With Nondestructive Inspection
Application	construction pipe, machine structure pipe, agriculture equipment pipe, water and gas pipe, Greenhouse pipe, Building material, Furniture tube, Low pressure fluid tube, etc
Others	1:Special design available according to requirement
	2:Pipe can be necked dowm, punching hole on pipe wall.
	3:Pipe fittings, elbows are available.
	4.All production process are under the ISO 9001:2000 strictly

Chemical Composition and Mechanical Properties

Standard	Grade	Chemical Composition (max)%					Mechanical Properties (min)
Standard	Grade	C (Max.)	Mn (Max.)	Si (Max.)	S (Max.)	P (Max.)	Yield Strength(Mpa)	Tensile Strength(Mpa)
GB/T700-2006	Q235A	0.22	1.40	0.35	0.050	0.045	235	370
	Q235B	0.20	1.40	0.35	0.045	0.045	235	370
	Q235C	0.17	1.40	0.35	0.040	0.040	235	370
	Q235D	0.17	1.40	0.35	0.035	0.035	235	370
GB/T1591-2009	Q345A	0.20	1.70	0.50	0.035	0.035	345	470
	Q345B	0.20	1.70	0.50	0.030	0.030	345	470
	Q345C	0.20	1.70	0.50	0.030	0.030	345	470
BS EN10025	S235JR	0.17	1.40	-	0.035	0.035	235	360
	S275JR	0.21	1.50	-	0.035	0.035	275	410
	S355JR	0.24	1.60	-	0.035	0.035	355	470
DIN 17100	ST37-2	0.20	-	-	0.050	0.050	225	340
	ST44-2	0.21	-	-	0.050	0.050	265	410
	ST52-3	0.20	1.60	0.55	0.040	0.040	345	490
JIS G3101	SS400	-	-	-	0.050	0.050	235	400
JIS G3101	SS490	-	-	-	0.050	0.050	275	490
API 5L PSL1	A	0.22	0.90	-	0.030	0.030	210	335
	B	0.26	1.20	-	0.030	0.030	245	415
	X42	0.26	1.30	-	0.030	0.030	290	415
	X46	0.26	1.40	-	0.030	0.030	320	435
	X52	0.26	1.40	-	0.030	0.030	360	460
	X56	0.26	1.10	-	0.030	0.030	390	490
	X60	0.26	1.40	-	0.030	0.030	415	520
	X65	0.26	1.45	-	0.030	0.030	450	535
	X70	0.26	1.65	-	0.030	0.030	585	570
API 5L PSL2	B	0.22	1.20	-	0.025	0.015	245-450	415-760
	X42	0.22	1.30	-	0.025	0.015	290-495	415-760
	X46	0.22	1.40	-	0.025	0.015	320-525	435-760
	X52	0.22	1.40	-	0.025	0.015	360-530	460-760
	X56	0.22	1.40	-	0.025	0.015	390-545	490-760
	X60	0.22	1.40	-	0.025	0.015	415-565	520-760
	X65	0.22	1.45	-	0.025	0.015	450-600	535-760
	X70	0.22	1.65	-	0.025	0.015	483-621	565-758

Galvanized Steel Pipe products are divided into two main categories based on the galvanizing process: 1) pre-galvanized steel pipe; 2) hot-dip galvanized steel pipe.
Pre-galvanized steel pipe (also known as GI pipe) is made from continuous hot-dip galvanized steel strip wound and welded, and the galvanizing process takes place before the pipe is formed.
Hot-dip galvanized steel pipe are made from welded steel tubes with a black surface which are degreased, pickled, dipped, dried, and then impregnated with dissolved zinc for a period of time, with the galvanizing step taking place after the tubes are formed.
The main difference between pre-galvanized steel pipe and hot-dip galvanized steel pipe:
1. Different appearance:
The surface of pre-galvanized steel pipe is smooth, bright, even, flat and greenish white.
The surface of hot-dip galvanized steel pipe is rough, which is caused by the hot-dip galvanizing process, and the color is darker and silver-white.
2. Corrosion resistance:
The corrosion resistance of pre-galvanized steel pipe is poorer than that of hot-dip galvanized pipe, firstly, because the galvanized strip removes the excess zinc liquid during the production process, resulting in a thinner layer of zinc; secondly, because galvanizing is carried out prior to the formation of the steel pipe, there will be no zinc coverage on the weld seams and cuts of the pre-galvanized steel pipe, resulting in poorer corrosion resistance.
Hot-dip galvanized steel pipe has strong corrosion resistance, and its service life can be up to 20-50 years depending on the use environment and the amount of galvanization.
3. Cost:
Pre-galvanized pipe costs less than hot-dip galvanized pipe.

Galvanized Steel Pipe

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Galvanized Steel Pipe

Packaging And Transportation

We offer different modes of transport depending on the customer's destination: rail transport and ship transport，etc.The Shipping Mark shall consist of: Trade mark, Seller's name, Product name, Applicable standards, Specifications, Package No., Contract No., Heat No., Production date, Weighing method, Net weight, Gross Weight, Consignee and Protection symbols, etc.

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