Purchase pipe fittings need to pay attention to several issues

- Feb 11, 2019-

  1. Material problem

The material that a lot of enterprises use is more informal, often point to contain nickel content.Although you can use the liquid to distinguish, but it is obvious that this is a mistake, because the small furnace charge containing nickel only 7 more is not able to distinguish.But the price difference of raw material is very big however, this is one of make false.Especially 321 high nickel and 316 high nickel are very serious to fake.

2. Size problem

Many customers have little or no technical support for testing.For example, 90 degree elbow, the conventional is R= 1.5d, but throughout the wenzhou market basically produce mold is 1.25d, do not underestimate the weight of this 0.25D~~ inside the material is very different.That is to say, the factory standard is much shorter than the standard.

3. Thickness problem

Of course, now the customer is very smart, will use calipers to measure the thickness, although sometimes the customer after the test feel reluctantly up to the standard, but ignored a point, is the thickness of the back arc is not enough!!!Because there will be wall reduction in the process of elbow pushing, the caliber is barely up to the standard, while the back end is basically unqualified, as the general experts know, 114x3-5 elbow will mostly use 114X4 thick pipes to produce.If the manufacturer purchases a little thinner, the natural loss will be reduced a lot, but the product will become more than a facade, the surface standards.

4. Solid solution treatment and nondestructive testing

Many manufacturers in the market do not do solid solution treatment and 100% penetration of non-destructive testing, which have a lot of sandblasting instead of rolling sand, save these steps, greatly reduce the cost.

5. Seamless welding

Welding seamless, is to do welding elbow, after grinding and pickling sand blasting, the surface without any signs of welding, even using advanced flaw detection equipment can not be seen that it is a welding elbow.

6. Spot welding and repair welding

Elbow push process will appear in the thin, so generally manufacturers will use a little thicker pipe.If the use of thin raw materials, the production will certainly not qualified.Reduce commonly thin have 40 silk left and right sides, if the technology is bad or use the pipe material that draw, ply is under standard apparently a lot of.

At this time, if the same material welding wire spot welding thickness is insufficient, to a certain thickness of grinding sand blasting, cracks in the place to take the repair welding, even with a large hole in the steel tube, can be made up for a time.

Product Description

Shandong fenghua 304 Seamless Steel Tubes Pipes

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
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

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