Buying stainless steel pipe without checking the size chart or weight per metre is one of those mistakes that only happens once. An SS pipe that looks right in the catalogue turns out to be the wrong schedule, the wrong OD, or heavier than the structure can carry — and by then the order has already been placed.
This guide covers everything that matters before a purchase decision: sizes, weights, how to calculate them, and what to expect on pricing in India in 2026.
SS Pipe Sizes & Size Chart
Stainless steel pipes are sized by nominal bore (NB) or outer diameter (OD), and wall thickness is defined by the schedule — Schedule 5, 10, 40, 80, and so on. Higher schedule = thicker wall = heavier pipe.
The most common grades in India are SS 304 and SS 316. Both come in the same size range; the difference is corrosion resistance and application suitability.
SS Pipe Size Chart (Common Sizes)
| Nominal Bore (NB) | OD (mm) | Sch 10 WT (mm) | Sch 40 WT (mm) | Sch 80 WT (mm) |
| 15 NB (½”) | 21.3 | 2.11 | 2.77 | 3.73 |
| 20 NB (¾”) | 26.7 | 2.11 | 2.87 | 3.91 |
| 25 NB (1″) | 33.4 | 2.77 | 3.38 | 4.55 |
| 32 NB (1¼”) | 42.2 | 2.77 | 3.56 | 4.85 |
| 40 NB (1½”) | 48.3 | 2.77 | 3.68 | 5.08 |
| 50 NB (2″) | 60.3 | 2.77 | 3.91 | 5.54 |
| 65 NB (2½”) | 73.0 | 3.05 | 5.16 | 7.01 |
| 80 NB (3″) | 88.9 | 3.05 | 5.49 | 7.62 |
| 100 NB (4″) | 114.3 | 3.05 | 6.02 | 8.56 |
WT = Wall Thickness. This ss pipe size chart covers the most commonly ordered sizes in Indian markets. For larger diameters (6″, 8″, 10″, 12″ and above), OD continues to increase at standardised increments and wall thickness follows the same schedule system.
SS Pipe Weight Chart
Weight matters for two reasons: structural load calculations and freight cost. A project that underestimates total pipe weight either overloads the supporting structure or gets hit with an unexpected logistics bill.
SS Pipe Weight Chart (kg/metre — SS 304, approximate)
| Pipe Size (NB) | Schedule 10 (kg/m) | Schedule 40 (kg/m) | Schedule 80 (kg/m) |
| 15 NB (½”) | 0.97 | 1.27 | 1.62 |
| 20 NB (¾”) | 1.27 | 1.69 | 2.20 |
| 25 NB (1″) | 2.09 | 2.50 | 3.24 |
| 40 NB (1½”) | 3.11 | 4.05 | 5.41 |
| 50 NB (2″) | 3.93 | 5.44 | 7.48 |
| 80 NB (3″) | 6.26 | 11.29 | 15.27 |
| 100 NB (4″) | 8.17 | 16.07 | 22.32 |
This ss pipe weight chart is based on standard material density for stainless steel (approx. 7.93 g/cm³ for SS 304). SS 316 density is marginally higher but the difference in weight per metre is negligible for most project calculations.
SS Pipe Weight Calculator (How It Works)
An ss pipe weight calculator does one thing: takes the pipe dimensions you input — OD, wall thickness, and length — and returns the weight in kilograms. No table-hunting, no manual cross-referencing.
Most online calculators ask for:
- Outer diameter (mm)
- Wall thickness (mm)
- Length (metres)
- Material grade (SS 304, SS 316, etc.)
The output is weight per piece and total weight for the quantity entered. Useful for procurement teams checking freight weight across multiple pipe sizes in a single order.
If you are working from a drawing that specifies NB size and schedule, convert to OD and WT first using the size chart before entering values.
SS Pipe Weight Formula
The formula behind every ss pipe weight calculator is the same:
Weight (kg/m) = 0.02466 × (OD − WT) × WT
Where:
- OD = Outer Diameter in mm
- WT = Wall Thickness in mm
- 0.02466 = material constant for stainless steel (density-based)
Example — 50 NB Schedule 40 SS pipe:
OD = 60.3 mm, WT = 3.91 mm
Weight = 0.02466 × (60.3 − 3.91) × 3.91 = 0.02466 × 56.39 × 3.91 = 5.43 kg/metre
Cross-check this against the weight chart above — 5.44 kg/m. The small rounding difference is normal. For a 6-metre pipe, total weight = 5.43 × 6 = 32.6 kg per piece.
Run this calculation across all sizes in your BOM before placing the order. It prevents surprises at the weighbridge.
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SS Pipe Price in India
SS pipe price in India is quoted per kg, per metre, or per piece depending on the supplier. Per kg is the most transparent basis for comparison — it removes size and length as variables.
Approximate price ranges for 2026:
| Grade & Type | Price Range (Per Kg) |
| SS 202 (Welded) | ₹130 – ₹180 |
| SS 304 (Welded) | ₹180 – ₹240 |
| SS 304 (Seamless) | ₹280 – ₹380 |
| SS 316 (Welded) | ₹260 – ₹340 |
| SS 316 (Seamless) | ₹380 – ₹520 |
These are ex-factory or distributor-level indicative rates. Retail prices are higher. Market rates move with nickel and chromium prices on the LME — check current levels before finalising any large purchase.
Factors That Affect SS Pipe Cost
Grade. SS 316 costs 30–40% more than SS 304 because of the molybdenum content. Using 316 where 304 works fine is unnecessary cost. Using 304 where 316 is specified is a maintenance problem.
Seamless vs welded. Seamless pipes are extruded without a weld seam — used in high-pressure applications, priced significantly higher. Welded pipes cover most standard applications at lower cost.
Wall thickness (schedule). More material per metre means higher cost. Schedule 80 can run 40–60% more per metre than Schedule 10 in the same size and grade.
Surface finish. 2B mill finish is the standard baseline. Mirror polish, brushed, and electropolished finishes add cost based on the application requirement.
Order quantity. Small orders attract a premium. Large project orders by the tonne typically bring better pricing, production priority, and delivery terms.
Common Uses of SS Pipe
Process piping — chemical plants, refineries, and pharmaceutical facilities use SS 316 seamless pipe for fluid and gas transfer lines where contamination cannot be tolerated.
Water and sanitation systems — SS 304 welded pipe is used in potable water lines, water treatment plants, and sewage systems where long service life and corrosion resistance matter more than cost.
Food and beverage industry — hygienic piping in dairy, brewing, and food processing uses electropolished SS 304 or 316 pipe to meet sanitation standards.
Structural and architectural — balustrades, handrails, columns, and facades in commercial buildings use SS pipe for its combination of strength and appearance.
Oil and gas — offshore and onshore infrastructure uses high-schedule SS seamless pipe for critical pressure applications.
Conclusion
An SS pipe purchase that goes wrong — wrong grade, wrong schedule, wrong weight estimate — creates problems that show up on site, not in the catalogue. Getting the size chart, weight calculation, and pricing right before the order goes in is the straightforward way to avoid them.
Primegold manufactures stainless steel pipes across grades, sizes, and finishes with consistent dimensional accuracy and material certification. Whether you need standard SS 304 welded pipe for a water project or high-schedule SS 316 seamless for process piping, the range covers both ends.
FAQ
What is an SS pipe and where is it used? An SS pipe is a stainless steel pipe used in construction, plumbing, industrial processing, and food-grade applications due to its strength and corrosion resistance.
How is SS pipe weight calculated? SS pipe weight is calculated using OD, wall thickness, and length with a standard formula or by using an SS pipe weight calculator.
What factors affect SS pipe price in India? Price depends on grade (304/316), seamless or welded type, wall thickness, surface finish, and market rates of raw materials like nickel and chromium.
What is the difference between SS 304 and SS 316 pipes? SS 316 offers better corrosion resistance due to molybdenum content, making it suitable for chemical and marine environments compared to SS 304.
Why is an SS pipe size chart important before buying? A size chart helps verify correct diameter, thickness, and schedule, preventing wrong orders and ensuring compatibility with design and load requirements.
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