Q235B High-frequency Straight Seam Welded Pipe Q345B Structure Steel Pipe Large-diameter Thick-walled Pipe

» Product Introduction

Welded pipe is an electric welded round pipe that is an alternative to steel pipes.It is a structural grade tube that is suitable for a wide variety of applications where dimensional accuracy and precision tolerances is not a primary concern.A raised weld seam is present inside the pipe.

Spiral welded steel pipe is a kind of practical steel pipe, now it has been widely used in small and medium-sized construction site construction facilities, not only that, spiral steel pipe is often used in mining, power, construction and various pipeline systems, one of the important industries.

On the basis of the original is trying to research this more excellent quality of new spiral steel pipe, the purpose is to spiral steel pipe for everybody to create greater profits for pressure fluid transmission with spiral seam submerged arc welding steel pipe.Spiral welded pipe industry investment risk and prospect consulting analysis report released by China industry research network shows that spiral welded pipe is widely used in the fields of tap water engineering, petrochemical industry, hydropower station, power industry, agricultural irrigation and rural construction.Spiral steel pipe is widely used in agriculture, chemical industry, construction, water conservancy, petrochemical industry.

Key Specifications/ Special Features:

1)Spiral welded pipe is the low carbon carbon structural steel and low alloy steel strip according to certain Angle of helix Angle (called molding) rolled into a tube billet, then pipe seam welding made up, it can use a narrow strip in the production of large diameter steel pipe.* wall thickness, according to its specifications with diameter welded pipe shall ensure that the water pressure test, the tensile strength and cold bending properties of the weld in accordance with regulations.

2)Commonly used standards of the spiral steel pipe can be divided into: SY/T5037-2000 (solid, also known as the common fluid conveying pipe with spiral seam submerged arc welding steel pipe), GB/T9711.1-1997 (national standard, also known as oil and gas industry conveying pipe delivery technical conditions in the first part: grade A steel pipe (GB/T9711.2 strict grade B steel pipe)), API 5L (American petroleum institute, also known as the pipeline steel pipe; which can be divided into PSL1 and PSL2 two levels), SY/T5040-92 (pile with spiral seam submerged arc welding steel pipe).

» Product Specification

Description	Spiral Welded Steel Pipe, Straight Seam Welded Steel Pipe, Carbon Steel Tube, ERW Steel Tube, EFW Steel Pipe
Standards	API 5L ERW PSL1/PSL2, EN39, BS1139, BS1387, EN10255, ASTM A53, A500, A36, A795, ANSI C80, DIN2440, JIS G3444, GB/T3091, GB/T13793
Certificate	API 5L ERW PSL1/PSL2, API 5CT, CE, ISO
Material	Q195, Q215, Q235, Q275, Q295, Q345, S275, S355, 08F, 08, 08AL, 08F, 10F, 10, HG5, DF08 SPHC, M8
	ASTM A53: Gr.A, Gr.B, Gr.C, Gr.D
	API 5L: Gr.A, Gr.B, X42, X46, X52, X56, X60, X65, X70
	GB/T9711: L175, L210, L245, L290, L320, L360, L290, L320, L360, L390, L415, L450, L485, L555
	ASTM A252: Gr.1 Gr.2 Gr.3
Type	Spiral, ERW (Electrical Resistance Weld), EFW (Electric Fusion Welding)
Outside Diameter	6mm-2500mm (1/8 inch, 1/4 inch, 1/2 inch, 3/4 inch, 1inch, 1 1/4 inch, 1 1/2 inch, 2inch, 2 1/2 inch, 3inch, 3 1/2 inch, 4inch, 5 inch, 6inch, 8 inch, 10 inch, 12inch, 14inch, 16 inch, 18 inch, 20 inch, 22 inch, 24 inch, 26inch, 28 inch, 30 inch, 32 inch, 34 inch, 36 inch, 38 inch, 40 inch, 42 inch, 44 inch, 46 inch, 48 inch)
Thickness	1mm~220mm (SCH5 ,SCH10,SCH20,SCH30,STD,SCH40,SCH60,XS, SCH80,SCH100,SCH120,SCH140,SCH160, XXS)
Length	6m-12m,or as required
Outside Coating	Anti-rust oil, black painting.
	Epoxy Coating according to AWWA C-210
	Bitumen Coating according to DIN30672, BS534
	Coal- Tar Enamel Coating according to AWWA C-203
	3 Layer polyethylene Coating according to DIN30670
	3 Layer Polypropylene Coating according to DIN30678
Inside Coating	Epoxy lining according to AWWA C-210
	Bitumen Lining according to DIN30673, BS534
	Coal-Tar Enamel Lining according to AWWA C-203
	Cement Mortar Lining according to AWWA C-205, BS534
Testing and Inspection Reports	EN 10204 3.1, Mill TC EN 10204 3.1, Third Party Inspection Reports, Visual Inspection Reports, Destructive Test Report, Non Destructive Test Reports, PMI Test Reports, Chemical and Mechanical Reports, NABL Approved Lab
Price Term	EX-Work, FOB, CFR, CIF
Package	Wooden box, bundled for export standard or as required
Payment Term	T/T, L/C,
Delivery Time	25-45 days (based on quantity) after receiving advanced payment
Application	a) General service industries (petroleum, food, chemical,  paper, fertilizer, fabric, aviation and nuclear) b) Fluid, gas and oil transport c) Pressure and heat transmission d) Construction and ornament e) Boiler heat exchangers

 

Chemical Composition and Mechanical Properties

Standard	Grade	Chemical Composition (max)%					Mechanical Properties (min)
		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
	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

 

Butt-welded pipe is formed by feeding a hot steel plate through shapers that will roll it into a hollow circular shape. Forcibly squeezing the two ends of the plate together will produce a fused joint or seam.

Least common of the three methods is spiral-welded pipe. Spiral-welded pipe is formed by twisting strips of metal into a spiral shape, similar to a barber’s pole, then welding where the edges join one another to form a seam. This type of pipe is restricted to piping systems using low pressures due to its thin walls.

Each of the three methods for producing pipe has its advantages and disadvantages. Butt-welded pipe, for example, is formed from rolled plate that has a more uniform wall thickness and can be inspected for defects prior to forming and welding. This manufacturing method is particularly useful when thin walls and long lengths are needed. Because of the welded seam, however, there is always the possibility of defects that escape the numerous quality control checks performed during the manufacturing process.

As a result, the American National Standards Institute (ANSI) developed strict guidelines for the manufacture of pipe. Pressure Piping Code B31 was written to govern the manufacture of pipe. In particular, code B31.1.0 assigns a strength factor of 85% for rolled pipe, 60% for spiral-welded pipe, and 100% efficiency for seamless pipe.

Generally, wider wall thicknesses are produced by the seamless method. However, for the many low-pressure uses of pipe, the continuous welded method is the most economical. Seamless pipe is produced in single and double random lengths. Single random lengths vary from 16′-0″ to 20′-0″. Pipes 2″ and below are found in double random lengths measuring from 35′-0″ to 40′-0″.

» Product Dispaly

We can produce different sizes, thicknesses, widths and materials according to your requirements

Anti-corrosion processing

Our manufacturing facilities, perform three types of welding processes: ERW, LSAW, HSAW and Anti-corrosion. The facilities are fully equipped with the world's utmost advanced full auto production lines and lab test equipment which allows us to provide the quality of our product.

3LPE steel pipe blasting&coating equipment can make water gas oil supplied pipeline dia. (32-3000mm),according to customers demand. The production line make internal and external shot blasting derusting,Dual Fusion Bonded Epoxy powder/liquide Coating & PE/PP film Wrapping ,End of PE grooving system and so on.

Hydrostatic test

» Application Scope

Carbon welded steel pipe has high strength, which makes them ideally suitable for pressure applications within the oil & gas, petrochemical, chemical, water supply, energy, sewage treatment, vanitation pipe, pulp & paper industries, etc.

» Package & 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.

» FAQ

Q1:Can you send samples?

A:Of course, we can provide customers with free samples and express shipping service to all over of the world.

Q2:What product information do I need to provide?

A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.

Q3:It's my first time to import steel products, can you help me with it?

A:Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:What ports of shipment are there?

A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.

Q5:What about product prices information?

A:Prices various according to periodic price changes of raw materials.

Q6:What is your terms of payment ?

A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.

Q7:Do you provide custom made Products service?

A: Yes,if you have your own design , we can produce according to your specification and drawing.

Q8:What are the certifications for your products?

A:We have ISO 9001, MTC, third parties’ inspections are all available such SGS, BV ect.

Q9:How long does your delivery time take?

A:In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.

Q10: How many countries you already exported to?

A:We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.

Q11:Can I go to your factory to visit?

A:Of course, we welcome customers from all over the world to visit our factory.

Q12:Does the product have quality inspection before loading?

A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed and customers can appoint third parties to inspect the products before loading too.

Q13:How to pack the products?

A: Standard export sea-worthy packaging, the inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It can effectively protect products from corrosion and various climate changes during ocean transportation.

Q14:What is your working time?

A:In general, our online service time is Beijing time: 8:00-22:00, after 22:00, we will reply to your inquiry in the coming working day.