SS seamless welded pipes grade 304 Diameter 21.3 mm X Sch 10

SS welded pipes grade 304 Diameter 21.3 mm X Sch 10 Stockholders, Suppliers & Exporters in India.

Stainless Steel (SS) welded pipes, particularly those made from Grade 304, are widely recognized for their durability, corrosion resistance, and versatility. These pipes are integral to industries such as petrochemical, oil & gas, and construction due to their ability to withstand harsh environmental conditions. When considering specific dimensions, such as a 21.3 mm diameter and Schedule 10 thickness, it is important to evaluate the material's benefits and applications.

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Applications of SS Seamless Tubes in Diameter 6mm x 0.9mm

  • Material Composition (Grade 304): SS 304 is an austenitic stainless steel containing 18-20% chromium and 8-10.5% nickel, making it highly resistant to corrosion and oxidation. Its exceptional strength-to-weight ratio, combined with excellent formability, ensures its widespread application in various environments.
  • Seamless Manufacturing Process: Unlike welded pipes, seamless pipes do not have a welded seam. This results in a pipe that is inherently stronger, reducing the risk of weak points and leaks. Seamless pipes are manufactured by extruding the steel to the desired dimensions, ensuring a uniform structure and superior mechanical properties.
  • Dimensional Specification (Diameter 21.3 mm X Sch 10):
        Diameter: The 21.3 mm outside diameter of these pipes is standard for small bore piping systems, often used in high-pressure environments.
        Schedule 10: This refers to the pipe wall thickness. Sch 10 pipes have a relatively thin wall, providing the right balance between strength and weight, making them suitable for low to moderate pressure applications.

Advantages of SS 304 Welded Pipes

  • Material Composition (Grade 304): SS 304 is an austenitic stainless steel containing 18-20% chromium and 8-10.5% nickel, making it highly resistant to corrosion and oxidation. Its exceptional strength-to-weight ratio, combined with excellent formability, ensures its widespread application in various environments.
  • Seamless Manufacturing Process: Unlike welded pipes, seamless pipes do not have a welded seam. This results in a pipe that is inherently stronger, reducing the risk of weak points and leaks. Seamless pipes are manufactured by extruding the steel to the desired dimensions, ensuring a uniform structure and superior mechanical properties.
  • Dimensional Specification (Diameter 21.3 mm X Sch 10):
        Diameter: The 21.3 mm outside diameter of these pipes is standard for small bore piping systems, often used in high-pressure environments.
        Schedule 10: This refers to the pipe wall thickness. Sch 10 pipes have a relatively thin wall, providing the right balance between strength and weight, making them suitable for low to moderate pressure applications.

Applications of SS 304 Welded Pipes - 21.3 mm X Sch 10

  • Petrochemical and Oil & Gas Industry: The thin wall of Schedule 10 pipes, combined with the corrosion-resistant properties of SS 304, makes them ideal for conveying fluids, gases, and chemicals in refineries and oil rigs.
  • Construction and Infrastructure: These pipes are commonly used in plumbing systems, structural support, and HVAC systems where low to medium pressure is involved, and corrosion resistance is a must.
  • Food Processing & Dairy Industry: Due to its non-reactive nature, SS 304 seamless pipes are widely used in food and dairy processing, ensuring that pipes do not alter the taste or quality of food products
  • Water Treatment Facilities: The ability to resist corrosion and biofouling makes SS 304 a popular choice for desalination plants, potable water systems, and wastewater treatment facilities.

Why Choose 304 Grade for welded Pipes?

  • Affordability & Availability: SS 304 is one of the most cost-effective stainless steel grades and is readily available across global markets, making it a popular choice for both manufacturers and buyers.
  • Versatility : SS 304 pipes can be used in a variety of environments—ranging from indoor plumbing to outdoor piping exposed to harsh conditions like saltwater or chemicals.
  • Food Processing & Dairy Industry: Due to its non-reactive nature, SS 304 seamless pipes are widely used in food and dairy processing, ensuring that pipes do not alter the taste or quality of food products
  • Compliance with Industry Standards: SS 304 seamless welded pipes adhere to multiple industry standards, including ASTM A312, which ensures high-quality manufacturing, inspection, and testing for pressure and corrosion resistance.

Stainless Steel Pipes Dimension – (S.S. Pipes)

Stainless Steel Pipes Dimension – (S.S. Pipes)
Wall thickness in mm. 0.5 0.6 0.7 0.8 1 1.2 1.6 2 2.6 3 3.2 3.6
O.D. in mm. Weight in kg/meter
6 0.069 0.081 0.093 0.104 0.125 0.144 0.176 – – – – –
9.52 0.112 0.134 0.154 0.174 0.213 0.249 0.317 – – – – –
10 0.119 0.141 0.163 0.184 0.225 0.264 0.336 – – – – –
12.7 0.153 0.182 0.21 0.238 0.293 0.345 0.444 – – – – –
14 0.169 0.201 0.233 0.264 0.325 0.384 0.496 – – – – –
15.87 0.192 0.229 0.266 0.301 0.372 0.44 0.571 0.694 – – – –
19 0.231 0.276 0.32 0.364 0.45 0.534 0.696 0.85 1.066 1.2 1.264 –
25 0.306 0.366 0.425 0.484 0.6 0.714 0.936 1.15 1.456 1.65 1.744 1.926
25.4 0.311 0.372 0.432 0.492 0.61 0.726 0.952 1.17 1.482 1.68 1.776 1.962
31.8 – – – – – 0.918 1.208 1.49 1.898 2.16 2.288 2.538
38 – – – – – 1.104 1.456 1.8 2.301 2.625 2.784 3.096
44.5 – – – – – 1.299 1.716 2.125 2.724 3.113 3.304 3.681
50.8 – – – – – 1.488 1.968 2.44 3.133 3.585 3.808 4.248
63.5 – – – – – – 2.476 3.075 3.959 4.538 4.824 5.391
76.1 – – – – – – 2.98 3.705 4.778 5.483 5.832 6.525
101.6 – – – – – – 4 4.98 6 7 7,872 8.82

Chemical Composition

CHEMICAL COMPOSITION (IN PERCENTAGE)
Grade C (Max) Mn (Max) P (Max) S (Max) Si (Max) Cr Ni Mo Nitrogen (Max) Cu/ Others
301 0.15 2 0.045 0.03 1 16.00 – 18.00 6.00 – 8.00 – 0.1 –
304 0.08 2 0.045 0.03 0.75 18.00 – 20.00 8.00- 10.50 – 0.1 –
304L 0.03 2 0.045 0.03 0.75 18.00 – 20.00 8.00- 12.00 – 0.1 –
310S 0.08 2 0.045 0.03 1.5 24.00- 26.00 19.00 – 22.00 – – –
316 0.08 2 0.045 0.03 0.75 16.00 – 18.00 10.00 – 14.00 2.00 – 3.00 0.1 –
316L 0.03 2 0.045 0.03 0.75 16.00 – 18.00 10.00 – 14.00 2.00 – 3.00 0.1 –
317 0.08 2 0.045 0.03 0.75 18.00 – 20.00 11.00 – 14.00 3.00 – 4.00 0.1 –
317L 0.03 2 0.045 0.03 0.75 18.00 – 20.00 11.00 – 15.00 3.00 – 4.00 0.1 –
321 0.08 2 0.045 0.03 0.75 17.00 – 19.00 9.00 – 12.00 – 0.1 Ti5 ( C + N ) Min or 0.70 max
347 0.08 2 0.045 0.03 0.75 17.00 – 19.00 9.00 – 13.00 – – Cb= 10x ( C Min ) or 1.00 Max
409 0.08 1 0.04 0.01 1 10.50 – 11.75 0.5 – – Ti= 6x (C+ N ) Min or 0.70 Max
409M 0.03 0.81.2 0.03 0.03 0.40.75 11.00- 12.00 1.5 max. – – Ti= 6x (C) Min or 0.70 Max
410S 0.08 1 0.04 0.03 1 11.50- 13.50 0.6 – – –
410 0.15 1 0.04 0.03 1 11.50- 13.50 0.75 – – –
420 0.35 0.5 0.035 0.015 0.5 12.00 – 13.00 0.20.3 – – –
430 0.12 1 0.04 0.03 1 16.00 – 18.00 0.75 – – –
JSL AUS 0.08 7.08.0 0.07 0.03 0.75 15.50 – 16.50 4.25 – 4.75 – – 0.9 – 1.10
JS- 203 0.08 9.2510.25 0.07 0.03 0.75 14.25 – 15.25 2.25 – 2.75 – – 1.60- 2.0
301M 0.1 4.55.5 0.06 0.03 0.75 14.50 – 15.50 6.0 – 7.0 – – 1.70- 1.90
* Thickness of 1.27mm & below will have elongation of 20% min.

Mechanical Properties

MECHANICAL PROPERTIES
Grade Tensile Strength
Mpa, (Min)		 Yield Strength
Mpa, (Min)		 %Age Elongation
in 50mm gauge
length min		 Hardness (Max)
BHN Rb
301 515 205 40 217 95
304 515 205 40 201 92
304L 485 170 40 201 92
310S 515 205 40 217 95
316 515 205 40 217 95
316L 485 170 40 217 95
317 515 205 35 217 95
317L 515 205 40 217 95
321 515 205 40 217 95
347 515 205 40 201 92
409 380 170 20 179 88
409M 430 275 20 187 90
410S 415 205 22 183 89
410 450 205 20 217 89
420 700( max ) – 15 217 95
430 450 205 22 183 89
JSL AUS 515 205 40 217 95
JS- 203 515 205 40 217 95
301M 515 205 40 217 95


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