ASTM A53 ERW Welded Steel Pipe Hot-DIP Galvanized Steel Pipe Carbon Steel Tube Mild Steel Pipes Black Iron Pipes Carbon Steel Pipes for General Structure

Basic Info

Usage	Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Chemical Industry, Special Purpose
Section Shape	Round
Transport Package	Customized
Specification	customized
Trademark	GZ steel
Origin	China
HS Code	7304319000
Production Capacity	10000 Tons Per Month

Product Description

welded steel pipe
Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.Steel Pipe & Tubing seem similar at first blush and in fact they share many characteristics but they also have some important differences.
Steel Tubing is a hollow steel shape intended for structural purposes and made from carbon, stainless, or galvanized steel further divided as:

Mechanical Tubing is used in low stress applications such as fences, kitchens, restaurants, hospitals, solar panels and made with wall thicknesses up to 10 gauge.

Structural Tubing is for high stress structural application like bridges, buildings, roll cages, and underwater platforms with wall thickness from 3/16" and up. It is often referred to as Hollow Structural Sections or just the acronym HSS.

Pipe is a hollow structure that is intended to carry material such as liquids, gasses, or even solids. Its wall thickness is described by its Schedule and it is often broken down by type using the method of manufacturing it, either ERW or Seamless.

How it's made

Both Tubing and Pipe are manufactured by the first two methods below. The third is reserved for Tubing only.

Electric Resistance Welded, often abbreviated as ERW, is a process that uses specific machinery to shape the pipe and tubing. A continuous steel sheet is unwound from a coil and shaped using contoured rollers, forcing the edges together under pressure. These edges are then welded together by heating the material to over 2,000 degrees. After welding, the pipe or tubing is cut into the exact size needed.

Seamless Pipe (and tubing) is made by extruding a steel block or by drilling a solid steel bar. Next, the extrusion or the drilled steel bar is cold drawn through a dye to achieve the diameter and thickness needed. Because this process can cause mechanical hardening, sometimes the material is annealed and straightened as a final process. Seamless Pipe & Tubing is subdivided as:

Cold Drawn Seamless, or CDS, exhibits precise tolerances and a good surface finish.

Hot Finished Seamless, or HFS, has less critical tolerances and somewhat scaly finish and is not as strong as CDS.

For Drawn over Mandrel, or DOM tubing, the first stages of manufacturing are identical to ones used to make electric resistance welded tubing, but in the finishing stages the entire flash weld is taken out and the tube is cold drawn over a mandrel. A mandrel is a round object against which material can be forged or shaped. The cold drawn process provides the tube with better dimensional tolerances, improved surface finish and the strongest weld strength achievable.

Typical Pipe Coatings & Finishes:
Galvanized - Covered with a protective zinc coating on steel to prevent the material from rusting. The process can be hot-dip-galvanizing where the material is dipped in molten zinc or Electro-Galvanized where the steel sheet from which the pipe is made was galvanized during production by an electro-chemical reaction.Uncoated - Uncoated PipeBlack Coated - Coated with a dark colored iron-oxideRed Primed - Red Oxide Primed used as a base coat for ferrous metals, gives iron and steel surfaces a layer of protection

Welded pipes specification and size

API SPEC 5CT

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Casting	API 5CT	Ø48.3~273 x WT2.77~11.43	J55, K55, N80, L80
Tubing	API 5CT	Ø48.3~273 x WT2.77~11.43	J55, K55, N80, L80, H40

API SPEC 5L

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Line Pipes	API 5L	Ø60.3~273.1 x WT2.77~12.7	A25, A, B, X42, X46, X52, X56, X60, X65, X70, X80

ASTM / ASME

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Electric-Resistance-Welded Steel Pipes	ASTM A135	Ø42.2~114.3 x WT2.11~2.63	A
Electric-Resistance-Welded Carbon Steel and Carbon-Manganese Steel Boiler and Superheater Tubes	ASTM A178	42.2-114.3 x 2.11-2.63	A, C, D
ERW and Hot-dip Galvanized Steel Pipes	ASTM A53	Ø21.3~273 x WT2.11~12.7	A, B
Pipes for Piling Usage	ASTM A252	Ø219.1~508 x WT3.6~12.7	Gr.2, Gr.3
Tubes for General Structural Purpose	ASTM A500	Ø21.3~273 x WT2.11~12.7	Gr.2, Gr.3
Square Pipes for General Structural Purpose	ASTM A500	25 x 25~160 x 160 x WT1.2~8.0	Carbon Steel

DIN

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Threaded Steel Pipes	DIN 2440	Ø21~164 x WT2.65~4.85	Carbon Steel

BS

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Screwed and Socketed Steel Tubes	BS 1387	Ø21.4~113.9 x WT2~3.6	Carbon Steel

EN

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Scaffolding Pipes	EN 39	Ø48.3 x WT3.2~4	Carbon Steel

JIS

Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Carbon Steel Tubes for General Structure Purpose	JIS G3444	Ø21.7~216.3 x WT2.0~6.0	Carbon Steel
Carbon Steel Tubes for Machine Structure Purpose	JIS G3445	Ø15~76 x WT0.7~3.0	STKM11A, STKM13A
Carbon Steel Pipes for Ordinary Piping	JIS G3452	Ø21.9~216.3 x WT2.8~5.8	Carbon Steel
Carbon Steel Pipes for Pressure Service	JIS G3454	Ø21.7~216.3 x WT2.8~7.1	Carbon Steel
Carbon Steel Rigid Steel Conduits	JIS G8305	Ø21~113.4 x WT1.2~3.5	G16~G104, C19~C75, E19~E75
Carbon Steel Rectangular Pipes for General Structure	JIS G3466	16 x 16~150 x 150 x WT0.7~6	Carbon Steel

Packing and Shipping
Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.About Us
We provide one-stop trading services, including: design, quotation, inspection,packaging, delivery and installation to meet customer needs. We have many excellent experienced personnel. Our technical team combines advanced technology to provide sketch design and efficient project solutions. Our international sales staff can use professional knowledge to solve your problems. Our customers will always be respected because we meet all aspects of your personal needs.The company has always insisted on striving for survival by quality,continuously innovating in management and technology,and has established a sound scientific management and quality assurance system.After 10 years of development and customer support, our carbon steel production capacity is from 500 tons/month to 10000 tons/month. Currently, we have 6 carbon steel production lines. Our professional engineers and well-trained workshop workers help our sales team complete every order ahead of schedule.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.