Standard for cold galvanized steel tubes

- Feb 11, 2019-

Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter, nominal diameter.Pipe for seamless steel tube outer diameter of the pipe by the letter D, followed by the size of the additional outer diameter and wall thickness, such as the diameter of 108 seamless steel tube, wall thickness is 5 mm, with 5 D108 * said, plastic pipe also expressed in diameter, such as De63, other such as reinforced concrete pipe, cast iron pipe, galvanized steel pipe with DN, said nominal diameter commonly used in the design drawings, nominal diameter is convenient to design and manufacture, and maintenance of artificially provisions of a standard, also relatively nominal diameter, is of the specifications of the pipe (or pipes) name.The nominal diameter of the pipe is not equal to its inside diameter and outside diameter, for example:Nominal diameter is 100 mm seamless steel tube by 108 * 102 * 5 5 several kinds, such as 108 for the outer diameter of the pipe, said the pipe wall thickness, therefore, the inner diameter of the steel pipe for (108 * 5-5) = 98 mm, but it is not completely equal to the difference between the steel pipe diameter double wall thickness reduction, also, to say the nominal diameter is close to the inner diameter, but is not equal to the inner diameter of a pipe diameter of the specifications of the name, so with a nominal diameter in the design drawings, the purpose is to according to the nominal diameter can be determined pipes, pipe fittings, valves, flanges, gaskets and other structure size and connection size,The nominal diameter is represented by the symbol DN. If the outer diameter is used in the design drawing, a comparison table of pipe specifications should be made to indicate the nominal diameter and wall thickness of a certain pipe.

Products Overview


Quick Details

Standard:ASTM, DIN, GB, JIS, ASTM A513-2007, DIN EN 10208-1-1998, DIN EN 10216-1-2004, GB/T 3094-2000, JIS G3465-2006, JIS G3466
Grade:10#-45#, 16Mn, A53-A369, Q19
Thickness:1.0 - 35 mm
Section Shape:Square
Outer Diameter:20*20-600*600
Place of Origin:Tianjin, China (Mainland)
Secondary Or Not:Non-secondary
Application:Structure Pipe
Technique:Cold Rolled
Special Pipe:Thick Wall Pipe
Alloy Or Not:Non-alloy
Name:galvanized steel pipe/iron rectangular tube
Yield Strength:360-380Mpa
Tensile Strength:560-580Mpa

Bend Test:Qualified
Impact Value:V-notch

Packaging & Delivery

Packaging Details:galvanized steel pipe/iron rectangular tube
                                     1.In bundles
                                     2.Standard export packing
                                     3. According to customer's requirements.
Delivery Detail:      15-30days Rectangular Pipe

Product Description

Corrugated square galvanized steel pipe iron rectangular tube

Square:20*20-600*600 mm
1.0-32 mm
GB/T3094-2000 GB/T6728-2002
JIS G 3466
DIN EN 10210
or according to customers requirement.
SS400 and so on.      
Hot Rolled, Cold Rolled,
High-frequency welded,
Bared, Oil, Galvanized, Paint
6m, 12m, or according to customers requirements
Machinery manufacture,
Roads and Bridges,
Port of Shipment
Tianjin, China 
In order to make best quotation, Please kindly indicate length, width, thickness and the standard,material you required.
Products Show

Corrugated square galvanized steel pipe iron rectangular tube


Processing of Corrugated square galvanized steel pipe iron rectangular tube

Production line of Corrugated square galvanized steel pipe iron rectangular tube

Our service
High quality
Passed the ISO9001:2015 quality system authentication.
Perfect Packing
Galvalume steel coil's perfect seaworthy package with wooden pallet.
Excellent Transport
Delivery these goods in excellent transporation.
Our company

Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.

Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects

Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555


Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners

Our advantages:

1.We've  got 35 years experience of steel .
2.We do large stocks of normal sizes,with prime quality and most competitive prices.
3.We do galvanizing-drilling holes-cutting into lengths one-stop services.
4.We can ensure most prime production wih very short delivery time.

Our Certifications
Review the past, we made a great achievement. Look ahead to the future, we are full of confidence to success. In the future improvement, we can improve the inner control system, growth the absorption and cultivation of talents, optimize the allocation of resources, and actively sell the diversification of business improvement space, remodeling the traditional steel trade business company to the iron and metallic logistics service agency, to enhance the middle competitiveness of enterprises.
In the future business improvement plans, the institution will similarly enhance internal management mechanism, growth the absorption and training of talents, take first rate efforts to optimize the corporation useful resource allocation, create a strong capability sales device and in the long run enhance competitive strength the various domestic metal enterprises. The organization will work collectively with the antique and new partners to create a better destiny!

Q: Do you've got the Corrugated square galvanized metal pipe iron square tube?

A: We have galvanized metallic pipe iron rectangular tube in stock ,also can produce consistent with your order.

Q: Do you offer samples ?How can I get a sample to test your nice? Is it free or extra ?
A: After fee affirmation, you could require for samples to test our excellent counter display. If you need the samples, we will price for the sample cost .But the pattern cost may be refundable after order affirmation when your amount of the order is greater about the MOQ.

Q: What's the shipping time?
A: 15~30days after receiving T/T prepayment or LC date.

Q: How is the first-class of your merchandise?
A: Our products are manufactured strictly in step with country wide and international standard, and we take a take a look at on each pipe before added out. If you want see our exceptional certifications and all sorts of testing report, please simply ask us for it.

Q: How are we able to believe you?
A: CSPG has been production and promoting metal products for decades since the 1990s .Now we've got been set up cooperation with the alibaba.Com .Trade warranty is a service by using alibaba designed to creat trust in trade,providing shoppers with a set of capabilities and protections to help make certain providers honor crucial information of the contract. If supplier does not meet the transport time or preshipment product high-quality requirements inside the contract, will refund up to the protected amout for your order.