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.
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.
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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,cnspipes.net will refund up to the protected amout for your order.