Stainless Steel Pipes – Grades, Sizes, Weights & Schedule Chart
Stainless Steel Pipes – Grades, Sizes, Weights & Schedule Chart
Stainless steel (SS) pipes are among the most widely used piping solutions across industries such as construction, food processing, pharmaceuticals, chemical, and water treatment. Known for their corrosion resistance, strength, and long life, SS pipes are available in multiple grades, sizes, and schedules to meet a variety of structural and fluid handling requirements.
This comprehensive guide covers everything you need to know about SS pipe sizes, schedules, grades (304/316), weight charts in KG per meter, and dimensional references. Whether you're an engineer, buyer, or industrial supplier, this is your one-stop resource for stainless steel pipe specifications and weight calculations.
What is a Stainless Steel Pipe?
A stainless steel pipe is a cylindrical tube made of stainless steel – an iron-based alloy containing a minimum of 10.5% chromium. It is used for transporting liquids, gases, and structural applications where corrosion resistance is essential. The most popular grades are SS 304, SS 316, and SS 202.
SS pipes are available in multiple forms such as seamless, welded, ERW (Electric Resistance Welded), and fabricated, each offering unique performance characteristics based on their construction and use case.
Types of Stainless Steel Pipe Grades
| Grade | Composition | Key Properties | Common Applications |
|---|---|---|---|
| SS 304 | 18% Cr, 8% Ni | Corrosion resistant, food-safe | Food processing, kitchen equipment, railings |
| SS 316 | 16% Cr, 10% Ni, 2% Mo | Marine grade, chemical resistant | Chemical plants, marine piping |
| SS 202 | 17% Cr, 4% Ni, 7% Mn | Cost-effective, less corrosion resistance | Structural tubing, interior applications |
SS Pipe Size Chart in mm and Inches
SS pipes are standardized in NB (Nominal Bore) sizes. The table below shows standard sizes:
| Nominal Bore (NB) | Outer Diameter (mm) | Outer Diameter (inch) |
|---|---|---|
| 15 NB | 21.3 mm | 0.84" |
| 20 NB | 26.7 mm | 1.05" |
| 25 NB | 33.4 mm | 1.31" |
| 40 NB | 48.3 mm | 1.90" |
| 50 NB | 60.3 mm | 2.38" |
| 100 NB | 114.3 mm | 4.5" |
| 150 NB | 168.3 mm | 6.63" |
Tip: Always refer to the pipe schedule chart to get exact wall thicknesses based on NB.
SS Pipe Schedule Chart – SCH 5 to SCH 160
The pipe schedule refers to the wall thickness. Higher the schedule, thicker the pipe wall. Here's a summary:
| NB (mm) | SCH 10 | SCH 40 | SCH 80 |
|---|---|---|---|
| 25 NB (1") | 1.65 mm | 3.38 mm | 4.55 mm |
| 50 NB (2") | 2.77 mm | 3.91 mm | 5.54 mm |
| 100 NB (4") | 3.05 mm | 6.02 mm | 8.56 mm |
SS Pipe Weight Chart – Kg Per Meter by Size
SS pipe weight is calculated based on OD and wall thickness. Here's a simplified weight chart (SS 304):
| Size (NB) | OD (mm) | Thickness (mm) | Weight (kg/m) |
|---|---|---|---|
| 15 NB | 21.3 | 2.0 | 1.03 |
| 25 NB | 33.4 | 2.6 | 2.60 |
| 50 NB | 60.3 | 3.0 | 4.80 |
| 100 NB | 114.3 | 4.0 | 11.60 |
SS Square Pipe – Sizes & Weight Chart
Square stainless steel pipes are used in architectural and fabrication work. Common sizes include:
- 20x20 mm x 1.5 mm thickness – 0.89 kg/m
- 25x25 mm x 2 mm thickness – 1.45 kg/m
- 40x40 mm x 2.5 mm thickness – 3.10 kg/m
Jindal SS 304 Pipe Weight Chart (PDF)
Jindal Stainless is the most trusted brand in India for SS 304 grade pipes. Their certified weight chart includes all NB sizes from 15 NB to 600 NB.
Applications of Stainless Steel Pipes
- Food & beverage industry (SS 304)
- Marine environments (SS 316)
- Structural frames and handrails (SS 202/304)
- Oil & gas lines
- Water treatment & purification
SS Pipe HSN Code & GST Rate
The HSN code for SS pipe is 7306. For seamless SS pipes, the HSN code is 73044100 and for welded SS pipes it’s 73064000.
- GST Rate: 18%
- UOM: KG or METER depending on use case
Related Resources
- Jindal SS 304 Pipe Weight Chart PDF
- SS Pipe Size Chart in mm & inches
- SS Square Pipe Weight Chart
- SS Pipe HSN Code
- Difference Between MS and SS Pipes
Contact Udhhyog – SS Pipe Manufacturer & Supplier in India
If you're looking for certified SS pipe suppliers in India with competitive pricing, fast delivery, and full size customization – contact Udhhyog today.
- ? Mobile: +91-9311120784
- ? Email: support@udhhyog.com
- ? WhatsApp: Click to Chat
- ? RFQ Page: Request a Quote
FAQs – Stainless Steel Pipe Guide
What is the difference between SS 304 and SS 316 pipe?
SS 316 contains molybdenum which makes it more resistant to corrosion, especially in marine or acidic environments. SS 304 is more commonly used in general applications.
How do I calculate SS pipe weight per meter?
Weight (kg/m) = (OD – Thickness) × Thickness × 0.02491 × 1000. Use standard charts for quick reference.
Which is the best SS pipe brand in India?
Jindal Stainless is widely regarded as the top manufacturer for SS 304 and 316 pipes in India.
Is GST applicable on SS Pipes?
Yes, stainless steel pipes fall under 18% GST rate as per HSN 7306.
What sizes are available in SS square pipe?
SS square pipes are available from 10x10 mm to 100x100 mm with thickness ranging from 1.2 mm to 5 mm.
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