How to identify inferior stainless steel welded pipe?
How to identify inferior stainless steel welded pipe?
- Folding
Fake and inferior welded stainless steel pipes are easy to fold. Folding is a variety of fold lines formed on the surface of stainless steel pipes. This defect often runs through the longitudinal direction of the whole product.
The reason for folding is that fake and inferior manufacturers pursue high efficiency too much, and the reduction is too large, resulting in the formation of ears in the pipe, which will be folded in the next rolling. The folded products will crack after bending, and the strength of stainless steel pipes will be significantly reduced.
The appearance of fake and inferior welded stainless steel pipes will have pitting. Pitted surface is a kind of irregular and uneven defect on the surface of stainless steel due to serious wear of rolling groove.
- Scarring
The surface of fake and inferior stainless steel welded pipe is easy to scar, which is mainly caused by two reasons. One is that the material of inferior stainless steel welded pipe is uneven and there are many impurities. The other is that the environmental sanitation equipment of the manufacturer of fake and inferior stainless steel welded pipe is simple and easy to stick to the steel. These impurities are easy to form scabs after biting into the roll.
- Cracks
It is also easy to form cracks on the surface of fake stainless steel welded pipes, because the billets are adobe, which has a lot of air holes. The adobe is subject to thermal stress during the cooling process, forming cracks, and will have cracks after rolling.
- Dull surface
The surface of inferior stainless steel welded pipe has no metallic luster, which will show a light red color or a color similar to pig iron, and it is easy to be scratched. Because the production equipment of the manufacturer of inferior stainless steel welded pipe is simple, it is easy to form burrs, scratch the steel surface, and deep scratches will weaken the strength of the stainless steel pipe.
- Specification is not up to standard
The negative tolerance of low-quality stainless steel welded pipe usually exceeds the specification, contains many impurities, the density of stainless steel pipe material is low, and the size out of tolerance is also serious
Stainless Steel Pipe/Tube Products:
MTSCO – Austenitic / Duplex steel / Nickel alloy
– To be the most reliable industrial metal service provider in the world
Who MTSCO is?
MTSCO established in 2006, during many years development, nowbecomes a large and professional industrial piping system provider, serving customers from more than 100 countries and regions.
What products can we provide?
What materials can we provide?
Austenitic
304/L/H/N, 316/L/H/N/Ti, 321/H, 309/H, 310S, 347/H, 317/L904L
Duplex steel
31803, 32205, 32750, 32760
Nickel alloy
Alloy B/ N10001, Alloy B2/N10665, Alloy B3/N10675, Alloy C4/N06455, Alloy C22/N06022, Alloy C276/N10276, Alloy C2000/N06200, Alloy G35/N06035, Alloy G30/N06030,
Alloy S/N06635, Alloy N/N10003, Alloy X/N06002, Alloy 188/R30188, Alloy 230/N06230,
Alloy 556/R30556, Alloy 600/ N06600, Alloy 601/N06601, Alloy 617/N06617,
Alloy 625/N06625, Alloy 718/N07718, Alloy X750/N07750, Alloy 800/N08800,
Alloy 800H/N08810, Alloy 800HT/N08811, Alloy 825/N08825, Alloy 925/N09925,
Alloy 926/N08926, Alloy 400/ N04400, Alloy K500/N05500
Precipitation-hardening Steels: 254SMO/S31254, 17-4PH, 17-7PH, 15-7PH
Nickel: N4/UNS N02201, N6/UNS N02200
How can MTSCO service customers?
MTSCO’s ISO9001 Quality System is issued by TUV. Our full and professional inspection reports contain two parts, one is self-inspection of the requirements beyond ISO9001, which is 100% inspected by our own QC; another is 100% inspected by professional QC teams.
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FAQ
1. Can you provide samples?
Of course, We can provide a few sample tubes for you to inspect and experiment.
2. Can we mark our logo on the product?
Yes
3. What is your packing?
Woven bags/Wooden boxes/Wooden reel/Iron reel and other packaging methods.
4. What inspection will you do?
In addition to routine surface and dimensional inspection. We can also do tensile, hardness and chemical composition analysis, and NDT like ultrasonic, eddy current, hydraulic testing.
5. What certificates do you have?
ISO9001/PED/AD2000/TS/ABS/CCS/BV/DNV……
6. What is your minimum order quantity(MOQ)?
According to different types of products, you can consult for details.
7. How long is your delivery time?
Products in stock: Within 5-7 days.
Customized products: 30-90 days, which is determined according to the product category.
8. What is your terms of payment?
T/T, L/C,O/A,D/P……
