GB/T 21832.2: Welded Ferritic Duplex Stainless Steel Tubes and Pipes for Fluid Transport
Introduction
GB/T 21832.2 is a Chinese national standard that specifies the requirements for welded ferritic duplex stainless steel tubes and pipes used for fluid transport. This standard covers various materials, specifications, chemical compositions, mechanical properties, and applications of these stainless steel tubes and pipes.
Material
The material used in accordance with GB/T 21832.2 includes the following grades:
- S21953
- S22253
- S22053
- S23043
- S22553
These grades are specifically designed to exhibit excellent corrosion resistance, high strength, and good weldability, making them suitable for various fluid transport applications.
Specification
GB/T 21832.2 provides detailed specifications for the dimensions, tolerances, and technical requirements of welded ferritic duplex stainless steel tubes and pipes. These specifications ensure the proper functioning and durability of the tubes and pipes in fluid transport systems.
Chemical Composition
The chemical composition of the ferritic duplex stainless steel grades mentioned in GB/T 21832.2 is as follows:
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N |
| S21953 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| S22253 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
| S22053 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 21.5-24.0 | 5.5-7.5 | 2.5-3.5 | 0.10-0.22 |
| S23043 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 22.0-24.0 | 3.0-5.5 | 0.10-0.60 | 0.10-0.30 |
| S22553 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 24.0-26.0 | 4.5-6.5 | 2.9-3.9 | 0.10-0.25 |
Mechanical Properties
The mechanical properties of the ferritic duplex stainless steel grades specified in GB/T 21832.2 are as follows:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| S21953 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22253 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22053 | ≥620 | ≥450 | ≥25 | ≤290 |
| S23043 | ≥620 | ≥450 | ≥25 | ≤290 |
| S22553 | ≥620 | ≥450 | ≥25 | ≤290 |
Application
The welded ferritic duplex stainless steel tubes and pipes specified in GB/T 21832.2 find extensive application in various fluid transport systems. These systems include but are not limited to:
- Oil and gas pipelines
- Chemical processing plants
- Desalination plants
- Heat exchangers
- Water treatment facilities
The excellent corrosion resistance, high strength, and good weldability of these stainless steel tubes and pipes make them ideal for handling corrosive fluids and operating in demanding environments.
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Product Tags:
|
|
GB/T 21832.2 S22253 Welded Ferritie Duplex Stainless Steel Tubes And Pipes For Fluid Transport Images
|
