Spiral steel pipe diameter generally refers to the internal diameter or external diameter
People often refer to pipe diameter when they express the specification of spiral steel pipe, so does pipe diameter refer to the outside diameter or the inside diameter of steel pipe?Here we introduce.The so-called pipe diameter is often referred to as the outer diameter, such as 630*8 spiral steel pipe, pipe diameter of 630mm, that is, the outer diameter of 630mm.
But in many projects, there is another specification representation method, namely the nominal diameter, which is the DN representation method that people are used to. It is neither the outside diameter nor the inside diameter, but an average value similar to.
1.Are you a factory or trading company?We are a Chinese manufacture of steel pipes with both factories and trading companies.2.Can I get samples earlier than order ?Yes, of course. Usually our samples are free. we can produce by means of your samples or technical drawings.
3. what is your transport time ?The time of delivery is usually round 1 month. We can ship out in three days if it has inventory.4.What is your payment terms?Our usual price time period is 30% posite, and relaxation towards B/L. L/C is also acceptatble EXW, FOB, CFR, CIF.5.What do your manufacturing unit do regarding quality control?We have received ISO, CE，API authentication. From fabric to products, we investigate each manner to maintain correct first-class.6. How can you make certain what I got might be proper ?Alibaba will act as our guarantor. If the product fails the inspection before leaving the manufacturing unit, you can refuse to just accept the goods.7. How do you make our business long-term and precise relationship?We preserve good high-quality and competitive charge to ensure our customers benefit ;
We respect each purchaser as our buddy and we sincerely do commercial enterprise and make buddies with them. No remember where they arrive from.8.How approximately MOQ?At least 5-10 heaps for the unit size pipes and 1ton for inventory pipes.
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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