what is Stainless Steel Welded Tube
Stainless steel welded pipe is a type of tubing produced by rolling stainless steel plates or strips into a tubular shape and subsequently joining them using welding processes such as TIG welding or plasma welding. Its key characteristics include uniform wall thickness, smooth internal and external surfaces, and the ability to be manufactured in custom lengths according to specific requirements. Common classifications are as follows:
- By Weld Type: Straight-seam welded pipe (typically small to medium diameters; high production efficiency) and spiral welded pipe (typically large diameters; superior structural strength).
- By Shape: Round pipe, square pipe, rectangular pipe, and irregularly shaped (profile) pipe.
- By Material Grade: 304 (general corrosion resistance), 316L (resistance to chloride ion corrosion), 310S (high-temperature resistance), etc.
What steel pipe grades do we offer?
TORICH offers a wide range of material grades-including austenitic, ferritic, martensitic, and duplex stainless steels, as well as nickel and special alloys-which can be selected based on specific project requirements.
The following are the most commonly used austenitic stainless steel welded pipe grades, characterized by excellent corrosion resistance, weldability, and formability.
| Steel Grade | Features | Typical Applications |
|---|---|---|
| 304 | General-purpose stainless steel with good corrosion resistance | Food processing, construction, water piping |
| 304L | Low carbon version of 304, better weldability | Welded structures, pressure piping |
| 316 | Enhanced corrosion resistance with molybdenum | Marine, chemical industry |
| 316L | Low carbon 316, excellent anti-corrosion performance | Pharmaceutical, medical, offshore |
| 321 | Titanium stabilized, resistant to intergranular corrosion | High-temperature equipment |
| 310S | Excellent high-temperature oxidation resistance | Furnaces, heat treatment equipment |
| 347H | Niobium stabilized stainless steel | Boilers, pressure vessels |
The following are the most commonly used ferritic stainless steel grades; they offer lower costs and good oxidation resistance, and are frequently utilized in automotive exhaust systems.
| Steel Grade | Features | Typical Applications |
|---|---|---|
| 409 | Good heat resistance and cost-effective | Automotive exhaust systems |
| 410 | High strength and wear resistance | Mechanical components |
| 430 | Good decorative performance | Decorative tubes, kitchen equipment |
| 439 | Improved corrosion resistance over 409 | Exhaust tubing, heat exchangers |
| 444 | Excellent pitting corrosion resistance | Water heaters, solar systems |
The following are the most commonly used duplex stainless steel grades, which combine the advantages of both austenitic and ferritic steels, offering high strength and superior resistance to chloride-induced corrosion.
| Steel Grade | Features | Typical Applications |
|---|---|---|
| 2205 | High strength and excellent corrosion resistance | Oil & gas, desalination |
| 2507 | Super duplex stainless steel | Offshore platforms, chemical plants |
The following are the most commonly used martensitic stainless steel grades, distinguished by their high hardness and mechanical strength.
| Steel Grade | Features | Typical Applications |
|---|---|---|
| 420 | High hardness after heat treatment | Surgical instruments |
| 440C | Excellent wear resistance | Bearings, cutting tools |
The following are the most commonly used nickel alloys and special stainless steel grades, suitable for extreme operating conditions.
| Steel Grade | Features | Applications |
|---|---|---|
| 904L | Super corrosion resistance | Acid processing equipment |
| 254SMO | Excellent seawater resistance | Marine engineering |
| Incoloy 800/800H | High-temperature alloy | Heat exchangers |
| Hastelloy C276 | Outstanding chemical resistance | Chemical processing |
Product Specifications
| Standards | ASTM A249, ASTM A269, ASTM A312, ASTM A554, EN 10217-7, JIS G3448,etc. |
| Steel Grades | 304, 304L, 316, 316L, 321, 310S, 409, 430, 2205, etc. |
|
Outer Diameter(OD) |
8mm - 1800mm, customizable |
| Wall Thickness (WT) | 0.5mm-55mm, customizable |
| Length | Max. 18 m or Customized |
| Tube Shapes | Round, Square, Rectangular, Oval, Capillary |
| Surface Treatment | BA, 2B, No.4, HL, Mirror Polish, Pickled |
| Production Process | TIG Welded / Laser Welded / ERW Welded/ HFW Welded |
| Certification | ISO 9001, PED, EN 10204 3.1 MTC |
why choose us
Quality control
TORICH implements a strict quality management system throughout the entire production process, ensuring that the pipes meet international standards such as ASTM, JIS, DIN, and EN.
Production capacity
TORICH boasts modern production lines with an annual capacity of 24,000 metric tons, enabling stable supply and timely delivery for large-scale projects and long-term contracts.
Customized service
TORICH offers flexible customization services, including custom sizes, materials, and special shapes. In addition, value-added processing services such as cutting, bending, and surface treatment are also available.
Packaging
TORICH uses packaging methods such as plastic end caps, plastic film, woven bags, wooden crates, and iron frames to prevent damage or contamination of the pipes during transportation.
our products
How to Clean Stainless Steel Welded Pipes
First, prepare two soft, fine-textured towels; cleaning wipes may also be used.
When selecting a stainless steel cleaner, it is strongly recommended to purchase a product manufactured by a reputable, legitimate manufacturer.
Wipe the surface of the stainless steel welded pipe clean using a soft towel; you may use a slightly dampened towel to wipe repeatedly until no visible marks remain on the surface.
Apply the stainless steel cleaner to a towel, ensuring it is evenly distributed, and then wipe back and forth across the surface of the stainless steel welded pipe.
Use a clean, damp towel to wipe down the surface of the stainless steel welded pipe, thereby removing the cleaner and any accumulated grime.
The Process of Manufacturing Stainless Steel Welded Tube
The Rolling And Welding Stage
To begin our process, we first need to go through the rolling and welding stage. The stainless steel is placed through a checking process and cut at the edges in this stage. The stainless steel is pushed through and morphed into its required tubular size with a rolling machine. After being pressed and turned through the rolling machine, the edges are welded through a heating process called TIG. The welding process joins the rolled metals together using an electric arc that has a built-in electrode.
Cleaning And Warming Stage
In this stage, steel tubes are lined up on a fabricator and cut to a required length before heading to the following process. The cleaning in this stage helps remove dirt from the pipes, and then once treated with heat, the rolled pipes and tubes are stripped of any stresses that can come up in the welding and formation process. The heat treatment given to stainless steel welded tube is done with a furnace-the furnace is actually equipped with temperature recorders and controllers, as this can help tremendously with containing temperature and controlling the way stainless steel is cured. After heating is finished, the stainless steel welded tube are taken through a pickling segment where they're straightened out, and scales are removed from its surface.
Cold-drawing Stage
Sometimes, the required size isn't obtained when the steel is brought through the mill directly. When using the cold-drawing process, the desired size is achieved when the pipes and tubing are coated with oxalic and soap solution and dragged over die plugs-the oxalic and soap solution help reduce friction when going through the cold cycle.
The Finishing Process
The final process is the finisher. Once the process of manufacturing stainless steel welded tube is completed, you'll now have to take them to a jet printer. The tubes are taken through, piece by piece, and marked with their grade of material, size, heat number, and third-party inspection stamp before being passed onto exporters. After everything is engraved, the pipes are taken through testing for quality and other checks. Finally, everything is packed and dispatched.
Our factory & quipment
Our Certificate
Customer cooperation
FAQ
Q: What is stainless steel welded tube used for?
Q: Can stainless steel welded tubes be used for 50 years?
Q: What is the most common stainless steel for pipes?
Q: What stainless steel welded tube is best for welding?
Q: What is the difference between 304 and 316 SS stainless steel welded tube?
Q: Is 316L stainless steel welded tube weldable?
Q: How can you tell if its 316 or 304 stainless steel welded tube?
Q: What is the best way to weld stainless steel pipe?
Q: What polarity do you weld stainless steel?
Q: What are the benefits of stainless steel tubing?
Hot Tags: stainless steel welded tube, China, suppliers, manufacturers, factory, customized, wholesale, price, OEM, mill, producer, for sale
