Knowledge of spiral steel pipe identification

- Feb 16, 2019-

When buying the spiral steel pipe, the first from the appearance size, use cursor card whether simple measuring tool measuring the actual size than indicated size (both on general spiral steel pipe rolling specification) about a specification or more (such as Ø 219 spiral steel tube standard inner diameter is 2188 mm + / - 0.4 mm, but most and inferior spiral steel pipe inner diameter is about 218 mm).Spiral steel tube knowledge, at the same time some fake spiral steel tube through the way to deceive people's vision, so from the steel tube surface end surface observation for flat oval, and the normal material end surface should be basically round;Secondly, from the surface quality, shoddy spiral steel pipe due to the use of unqualified raw materials rolling, its surface quality is poor, often with scars and other defects, the overall rough feeling.At the same time, some small steel mills due to heating temperature, rolling speed is not enough, the surface color slants red;Third, most of the normal spiral steel pipe factory in large bundles of packaging, bundles of steel are hanging with the metal signage corresponding to the real, indicating the manufacturers, steel brand, batch number, specifications and inspection code.However, due to the poor production conditions and the absence of large hoisting equipment, most of the fake steel bars are packed in small bundles (about 10 pieces are bound) or bulk.

No metal label, no quality guarantee.

Product Description

SS304 and SS316L sanitary welded stainless steel pipe

Steel pipe is used to transfer fluid and powdery solids, exchange heat energy, manufacture mechanical parts and containers, is also an economical Steel.Steel pipe can be divided into two categories according to the production method: seamless steel pipe and slit steel pipe, slit steel pipe and spiral welded pipe

1. Grade: SUS201,SUS304,SUS316,A2-70,A2-80,A4-80,4.8 6.8 8.8 10.9 12.9

2. Size: M3-48

3. Standard: DIN 315

4. Certification: ISO9001, SGS, CTI, ROHS

Product Name
Stainless Steel Pipes / Tubes
GB, ASTM, AISI, ASME,  EN. BS and others
TP 304, 304L, 308, 309, 309S, 310,  310S, 316, 316L, 317, 317L, 321, 904L 400 420 430
Delivery term
NO.1, 2B, NO.3, NO.4, BA, HL, 8K, polishing  etc.
0.5 - 30mm
Outer Diameter
6 - 610mm 
1 -  6meter or customized
building industry machinery Food decoration
round,  oval, square,  rectangular, sepcial secti on
Products Show
Compared to other

High quality

Passed the ISO9001:2008 quality system authentication and ROHS authentication.

High quality

High gloss surface, international material, no wrinkle bending.Flaring does not crack

High quality

Low gloss, poor quality materials, bending wrinkle.Flaring cracking

Our Company


Our Factory


Our Workshop


Our Warehouse


Our Team

Packing Professional

Packing Details  : Packing, solid bicycle saddle, Logistics can be selected, the fastest delivery

 professional:Professional instrument researchers for testing

1.Optional logistics, the fastest delivery speed

2. Packaging is optional
plastic bag per each tube  + strapping tape per bundle

3. Packaging is optional
plastic bag per each tube  + strapping tape per bundle

4. Professional instrument accurate measurement

5. Professional instrument accurate measurement

6. Professional instrument accurate measurement

Our Certifications

Customer Photo

Favorable Comment
We have 80 percent of the global's customers, a big marketplace from everywhere in the global to go to our company.The first-class of merchandise is checked by expert clinical research personnel of precise device testing, with the most complete certificate testing.Product range is completeyou could select merchandise at will.

Transportation offerings sea, air and land transportation, a variety of ways to choose, from the arrival to distribution, are the fastest velocity for distribution

Favorable Comment
It has obtained ISO9001:2008 and Bureau Veritas certification. During our 18 years of working on 400 series stainless steel and unique steel semi-manufactures, It has been proudly serving over 1000 customers in both home and oversea markets and various industries which includes Aviation, Automobile, Petrochemical, Textile, Hardware, Medical Apparatus, Electronic Product, Kitchenware and Cutlery.

Favorable Comment

It has three major processing factories located in Jinan city. We have most of the famous steel mills in China as our suppliers and a spot trading platform for 400 series with complete specifications and more than ten thousand tons inventory reserve. As a front-end workshop for steel product manufacturers, we can customize steel belt with sickness from 0.08 to 60 mm and width from 5.5 to 2000 mm.  


Q: Are you trading business enterprise or manufacturer ?
A: We are factory.

Q: How long is your shipping time?
A: Generally it's far 5-10 days if the products are in stock. Or it's far 15-20 days if the goods aren't in stock, it's far according to quantity.

Q: Do you offer samples ? Is it loose or extra ?
A: Yes, we could provide the sample for free rate but do no longer pay the cost of freight.

Q: What is your terms of payment ?
A: Payment=1000USD, 30% T/T in advance ,stability before shippment.
If you've got some other question, pls sense loose to contact us as below:


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