Stainless Steel Pipes Manufacturer in India
Stainless Steel Pipes Manufacturer in India
Sachiya Steel International is a leading Stainless Steel Seamless Pipes Manufacturer in India, established in 2005 and headquartered in Mumbai. We manufacture, supply, and export stainless steel, duplex, super duplex, carbon steel, alloy steel, and nickel alloy pipes and tubes to customers in 85+ countries. We serve EPC contractors, manufacturers, fabricators, distributors, engineering companies, and procurement teams across oil & gas, petrochemical, chemical, power, pharmaceutical, marine, construction, and engineering industries.
We manufacture and supply products according to ASTM, ASME, ANSI, DIN, and ISO standards, with inspection, testing, and material documentation as required. Our certifications include ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications. We support standard, bulk, and project requirements with material traceability, technical compliance, competitive solutions, and timely global delivery.
What Are Stainless Steel Seamless Pipes?
A stainless steel seamless pipe is a hollow pipe with no weld seam, made from steel that holds at least 10.5% chromium. The chromium reacts with oxygen and forms a thin, invisible oxide film on the surface. That film blocks rust, and it heals itself when scratched, so the pipe keeps its protection for decades. Nickel, molybdenum, and nitrogen added to the steel make the film tougher against chlorides, acids, and heat.
The mill starts with a solid round billet. It heats the billet, then pierces or extrudes it into a hollow shell. Some pipes stay hot finished, and others go through cold drawing or cold pilgering to reach a tighter size and a smoother surface. Next comes the step that matters most for stainless steel: solution annealing. The pipe is heated to 1,040°C or higher and cooled quickly, which dissolves harmful carbides and restores full corrosion resistance. Pickling in acid then removes scale, and passivation leaves a clean, uniform chromium oxide surface.
Because nothing is welded, a seamless pipe has no weld zone and no heat-affected area, so the wall behaves the same all around. That makes stainless steel seamless pipes the safe choice for high pressure, high temperature, and critical corrosion duty.
Stainless Steel Seamless Pipes
High-quality stainless steel seamless pipes manufactured for demanding applications across chemical, petrochemical, power generation, marine, construction and engineering industries. Available in multiple grades, sizes, wall thicknesses and manufacturing specifications.
Types of Stainless Steel Seamless Pipes
As a trusted Stainless Steel ERW Pipes Manufacturer, we offer different types of ERW pipes to meet the requirements of various industrial applications. Our range covers multiple stainless steel grades, sizes, and specifications for reliable performance in demanding environments.
- 304 Stainless Steel ERW Pipes: Suitable for general industrial, food processing, construction, and fabrication applications.
- 316 Stainless Steel ERW Pipes: Offers improved corrosion resistance and suits chemical, marine, pharmaceutical, and processing applications.
- 321 Stainless Steel ERW Pipes: Designed for applications that require good strength and resistance to high-temperature conditions.
- 347 Stainless Steel ERW Pipes: Provides good resistance to intergranular corrosion and supports high-temperature applications.
- Duplex Stainless Steel ERW Pipes: Combines high strength with good corrosion resistance for demanding industrial and engineering applications.
- Super Duplex Stainless Steel ERW Pipes: Provides higher strength and corrosion resistance for severe marine, chemical, oil & gas, and petrochemical environments.
304 Seamless Pipes, 316L Seamless Pipes, 321 and 347 Seamless Pipes, 904L Seamless Pipes, Duplex Seamless Pipes, Stainless Steel Seamless Pipes Manufacturers and Suppliers in India
We are one of the stainless steel seamless pipes manufacturers in India that process plants, shipyards, and EPC teams call when the grade must be exactly right. Our yard near Mumbai holds common grades and schedules in ready stock, and we draw or roll other sizes to order.
For general process lines, our 304 and 304L seamless pipes carry water, food, and mild chemicals. For chlorides, acids, and marine air, our 316 and 316L seamless pipes give the extra molybdenum. When the line runs hot, our 321, 347, and H-grade pipes hold their strength. For hot acids and seawater, our 904L and SMO 254 pipes take over, and for high-pressure offshore and desalination lines, our duplex and super duplex pipes bring strength and chloride resistance.
As a stainless steel seamless pipes supplier, we treat the pipe, the cleaning, and the paperwork as one product. We cut to length, bevel the ends, pickle and passivate, pack with plastic caps, and ship with full material traceability. Buyers comparing stainless steel seamless pipes suppliers can send us the grade, NPS, schedule, quantity, and port. We will reply with a price, a lead time, and the certificate type.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
Pipes and Tubes
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Seamless Pipes
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ERW Pipes
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LSAW Pipes
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SSAW Pipes
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Box Pipes
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Brass Pipes
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Heat Exchanger Tubes
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Boiler Tubes
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Aluminium Pipes
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Carbon Steel Seamless Pipes
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Carbon Steel Pipe
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Stainless Steel Pipe
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Alloy Steel Pipe
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Duplex Steel Pipe
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Super Duplex Steel Pipe
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Nickel Alloy Pipe
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Copper Nickel Alloy Pipe
→Get Certified Stainless Steel Seamless Pipes at Competitive Factory Prices
Stainless Steel Seamless Pipes Specification
| Parameter | What We Offer | Why It Matters |
|---|---|---|
| Size Range | 1/8" to 24" NPS (10.3 mm to 610 mm OD) | Covers instrument lines to process headers |
| Wall Thickness | SCH 5S, 10S, 40S, 80S, SCH 160, XXS, and custom | The schedule sets the pressure rating |
| Process | Hot extruded or pierced, cold drawn or cold pilgered | Cold finishing tightens size and surface |
| Heat Treatment | Solution annealed and rapidly cooled | Restores corrosion resistance and softens the steel |
| Surface | Annealed and pickled, passivated, bright annealed, polished | A clean surface resists pitting and staining |
| Length | Single random 16–22 ft, double random 36–40 ft, 6 m, custom cut | Fits your cutting plan with less waste |
| End Finish | Plain end, bevelled end (37.5°), threaded | Ready for welding or threading |
| Testing | Hydrostatic or NDE (eddy current or ultrasonic), PMI, IGC, flattening, flaring, hardness | Proves the grade and the soundness of every pipe |
| Marking | Grade, size, schedule, heat number, standard | Traces every pipe back to its mill certificate |
| Certificate | EN 10204 3.1 (3.2 on request) | Supports audits and third-party inspection |
Stainless Steel Seamless Pipe Standards and Specifications
| What It Covers | Standard | Note |
|---|---|---|
| Austenitic Stainless Steel Pipe | ASTM A312 / ASME SA312 | Covers 304, 316, 321, 347, 904L and more |
| High-Temperature Austenitic Pipe | ASTM A376 / ASME SA376 | Covers 304H, 316H, 321H, 347H |
| Duplex and Super Duplex Pipe | ASTM A790 / ASME SA790 | Covers 2304, 2205, 2507 |
| Dimensions | ASME B36.19M (5S, 10S, 40S, 80S), ASME B36.10M (SCH 160, XXS) | Fixes OD and wall for each NPS |
| General Requirements | ASTM A999 | Tolerances, tests, and marking |
| Intergranular Corrosion Test | ASTM A262 Practice E | Checks for sensitisation |
| Cleaning and Passivation | ASTM A380, ASTM A967 | Sets the surface condition |
| European Standard | EN 10216-5 | Seamless stainless tubes for pressure use |
| Piping Codes | ASME B31.3, B31.1 | Design rules for process and power piping |
| Sour Service | NACE MR0175 / ISO 15156 | Limits hardness for H2S service |
| Certificate | EN 10204 3.1 and 3.2 | Mill test and independent inspector options |
Stainless Steel Seamless Pipes Material and Grades
| Grade | UNS | EN No. | Typical PREN | Best For |
|---|---|---|---|---|
| 304 | S30400 | 1.4301 | ~19 | General process, water, food |
| 304L | S30403 | 1.4307 | ~19 | Welded construction in mild chemicals |
| 304H | S30409 | 1.4948 | ~19 | High-temperature steam and furnace lines |
| 316 | S31600 | 1.4401 | ~24 | Chlorides, dilute acids, marine air |
| 316L | S31603 | 1.4404 | ~24 | Welded lines in pharma, chemical, marine |
| 316H | S31609 | 1.4919 | ~24 | High-temperature service with chlorides |
| 316Ti | S31635 | 1.4571 | ~24 | Hot service, stabilised against sensitisation |
| 317L | S31703 | 1.4438 | ~30 | Stronger acids, flue gas desulphurisation |
| 321 | S32100 | 1.4541 | ~18 | Hot service up to about 850°C |
| 321H | S32109 | 1.4878 | ~18 | High-temperature strength with stabilisation |
| 347 | S34700 | 1.4550 | ~18 | Hot service, refinery and power |
| 347H | S34709 | 1.4912 | ~18 | Highest-temperature austenitic duty |
| 904L | N08904 | 1.4539 | ~35 | Hot sulphuric acid, phosphoric acid |
| SMO 254 | S31254 | 1.4547 | ~43 | Seawater, bleach plants, scrubbers |
| 2304 | S32304 | 1.4362 | ~25 | Lean duplex for general strength with chloride resistance |
| 2205 | S32205 | 1.4462 | ~35 | Offshore, desalination, oil and gas |
| 2507 | S32750 | 1.4410 | ~42 | Subsea, severe chloride service |
What Is the Difference Between Stainless Steel Seamless Pipes and Stainless Steel Welded Pipes?
The difference is the seam and the price. Seamless pipes start as solid billets and carry no weld. Welded pipes start as flat strip or plate that the mill rolls and welds, so they carry one seam. A well-made, annealed, tested weld performs well, and welded pipe costs less. But the weld zone is where corrosion, fatigue, and design factors concentrate, so many specifications ask for seamless pipe on high pressure, high temperature, and critical corrosion lines. Design codes also give welded pipe a joint factor, usually 0.85 unless the weld is fully examined, so a welded pipe of the same wall can carry less pressure.
| Factor | Seamless Pipes | Welded Pipes |
|---|---|---|
| Starting Material | Solid round billet | Flat strip or plate |
| Seam | None | One longitudinal weld |
| Wall Behaviour | Same all around | Weld zone differs slightly |
| ASME B31.3 Quality Factor | 1.00 | 0.85 (up to 1.00 with full examination) |
| Typical Size Range | 1/8" to 24" NPS | 1/8" to 48" NPS and larger |
| Pressure and Temperature | High | Low to high within the joint factor |
| Corrosion Risk at Weld | None | Needs good weld practice and annealing |
| Price | Higher | Lower |
| Lead Time | Longer | Shorter |
| Choose It When | The line is critical, hot, or under high pressure | The line is large, moderate in duty, or cost-led |
Stainless Steel Seamless Pipes Chemical Composition
Chemistry sets the corrosion resistance, strength, and weldability of each grade. Values are weight percent. Every grade also carries the limits shown in the last column, where "Mn / Si / P / S" lists the maximum manganese, silicon, phosphorus, and sulphur.
Standard and Stabilised Austenitic Grades (ASTM A312, A376)
| Grade | C | Cr | Ni | Mo | Other | Mn / Si / P / S (max) |
|---|---|---|---|---|---|---|
| 304 | 0.08 max | 18.0–20.0 | 8.0–11.0 | – | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 304L | 0.035 max | 18.0–20.0 | 8.0–13.0 | – | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 304H | 0.04–0.10 | 18.0–20.0 | 8.0–11.0 | – | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 316 | 0.08 max | 16.0–18.0 | 11.0–14.0 | 2.0–3.0 | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 316L | 0.035 max | 16.0–18.0 | 10.0–15.0 | 2.0–3.0 | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 316H | 0.04–0.10 | 16.0–18.0 | 11.0–14.0 | 2.0–3.0 | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 316Ti | 0.08 max | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | Ti 5×(C+N) min–0.70 | 2.00 / 1.00 / 0.045 / 0.030 |
| 317L | 0.035 max | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 | – | 2.00 / 1.00 / 0.045 / 0.030 |
| 321 | 0.08 max | 17.0–19.0 | 9.0–12.0 | – | Ti 5×(C+N) min–0.70 | 2.00 / 1.00 / 0.045 / 0.030 |
| 321H | 0.04–0.10 | 17.0–19.0 | 9.0–12.0 | – | Ti 4×(C+N) min–0.70 | 2.00 / 1.00 / 0.045 / 0.030 |
| 347 | 0.08 max | 17.0–19.0 | 9.0–13.0 | – | Nb 10×C min–1.00 | 2.00 / 1.00 / 0.045 / 0.030 |
| 347H | 0.04–0.10 | 17.0–19.0 | 9.0–13.0 | – | Nb 8×C min–1.00 | 2.00 / 1.00 / 0.045 / 0.030 |
High-Alloy, Duplex and Super Duplex Grades (ASTM A312, A790)
| Grade | C | Cr | Ni | Mo | Other | Mn / Si / P / S (max) |
|---|---|---|---|---|---|---|
| 904L | 0.020 max | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 | Cu 1.0–2.0 | 2.00 / 1.00 / 0.040 / 0.030 |
| SMO 254 | 0.020 max | 19.5–20.5 | 17.5–18.5 | 6.0–6.5 | Cu 0.50–1.00, N 0.18–0.25 | 1.00 / 0.80 / 0.030 / 0.010 |
| 2304 | 0.030 max | 21.5–24.5 | 3.0–5.5 | 0.05–0.60 | Cu 0.05–0.60, N 0.05–0.20 | 2.50 / 1.00 / 0.040 / 0.030 |
| 2205 | 0.030 max | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | N 0.14–0.20 | 2.00 / 1.00 / 0.030 / 0.020 |
| 2507 | 0.030 max | 24.0–26.0 | 6.0–8.0 | 3.0–5.0 | Cu 0.50 max, N 0.24–0.32 | 1.20 / 0.80 / 0.035 / 0.020 |
Stainless Steel Seamless Pipes Mechanical Properties
Mechanical properties show how much load the pipe carries before it stretches (yield) or breaks (tensile). Values are minimum unless marked max.
| Grade | Tensile ksi (MPa) | Yield ksi (MPa) | Elongation % | Hardness (max) |
|---|---|---|---|---|
| 304, 304H, 316, 316H, 316Ti, 317L | 75 (515) | 30 (205) | 35 | – |
| 321, 321H, 347, 347H | 75 (515) | 30 (205) | 35 | – |
| 304L, 316L | 70 (485) | 25 (170) | 35 | – |
| 904L | 71 (490) | 31 (220) | 35 | – |
| SMO 254 | 95 (655) | 45 (310) | 35 | – |
| 2304 | 87 (600) | 58 (400) | 25 | 290 HBW / 30.5 HRC |
| 2205 | 95 (655) | 65 (450) | 25 | 290 HBW / 30.5 HRC |
| 2507 | 116 (800) | 80 (550) | 15 | 310 HBW / 32 HRC |
ASTM A312 sets no hardness limit for the austenitic grades. For SMO 254, 904L, and heavy-wall pipes, the mill test certificate lists the exact values for each heat.
Stainless Steel Seamless Pipe Size and Weight Chart
Stainless steel pipe uses the ASME B36.19M schedules, which end in "S". The weights below are for 304 stainless steel, using a density of 7.93 g/cm³. Pipes in 316 and 316L weigh about 1% more, and duplex pipes weigh about 1% less.
| NPS | OD mm | 10S Wall mm | 10S kg/m | 40S Wall mm | 40S kg/m | 80S Wall mm | 80S kg/m |
|---|---|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 1.01 | 2.77 | 1.28 | 3.73 | 1.63 |
| 3/4" | 26.7 | 2.11 | 1.29 | 2.87 | 1.70 | 3.91 | 2.22 |
| 1" | 33.4 | 2.77 | 2.11 | 3.38 | 2.53 | 4.55 | 3.27 |
| 1-1/4" | 42.2 | 2.77 | 2.72 | 3.56 | 3.43 | 4.85 | 4.51 |
| 1-1/2" | 48.3 | 2.77 | 3.14 | 3.68 | 4.09 | 5.08 | 5.47 |
| 2" | 60.3 | 2.77 | 3.97 | 3.91 | 5.49 | 5.54 | 7.56 |
| 2-1/2" | 73.0 | 3.05 | 5.31 | 5.16 | 8.72 | 7.01 | 11.52 |
| 3" | 88.9 | 3.05 | 6.52 | 5.49 | 11.41 | 7.62 | 15.43 |
| 4" | 114.3 | 3.05 | 8.45 | 6.02 | 16.24 | 8.56 | 22.55 |
| 6" | 168.3 | 3.40 | 13.97 | 7.11 | 28.55 | 10.97 | 42.99 |
| 8" | 219.1 | 3.76 | 20.17 | 8.18 | 42.98 | 12.70 | 65.30 |
| 10" | 273.1 | 4.19 | 28.07 | 9.27 | 60.92 | 12.70 | 82.38 |
| 12" | 323.9 | 4.57 | 36.35 | 9.53 | 74.63 | 12.70 | 98.45 |
To work out the weight of any size, use Weight (kg/m) = (OD − Wall) × Wall × 0.02491 for 304, with both values in mm.
Common Materials
Stainless steel pipe grades belong to different families, and each family offers properties suited to specific industrial requirements. Stainless steel pipe suppliers provide these grades for applications involving corrosion, heat, pressure, and demanding operating conditions.
Austenitic grades, mainly the 300 series, contain chromium and nickel. Grade 304 suits water, food processing, and mild chemical applications, while Grade 316 contains molybdenum for improved resistance to chlorides and acids. Low-carbon grades 304L and 316L help maintain corrosion resistance after welding, while 304H and 316H offer higher-temperature strength. Stabilized grades 321 and 347 use titanium or niobium to improve stability at temperatures of roughly 425°C to 850°C.
Super austenitic grades such as 904L (UNS N08904) and SMO 254 (UNS S31254) contain higher levels of nickel and molybdenum for demanding acid and seawater environments. Duplex 2205 (UNS S32205) and super duplex 2507 (UNS S32750) combine high strength with strong resistance to chloride stress corrosion cracking. Suppliers also offer these grades in different sizes and specifications to meet project requirements. Engineers use PREN to compare pitting resistance: PREN = %Cr + 3.3 × %Mo + 16 × %N. Higher PREN values generally indicate better pitting resistance in chloride environments.
Available Sizes, Dimensions and Schedules
We supply stainless steel seamless pipes from 1/8" to 24" NPS in schedules 5S, 10S, 40S, 80S, 160, and XXS. A schedule is a code for wall thickness, so the same schedule gives a different wall in mm at each pipe size, while the outside diameter stays fixed for each NPS. A thicker schedule therefore shrinks the bore and raises the pressure the pipe can carry. Pipes above 12" NPS and walls beyond 80S come on request.
Standard lengths are single random (16–22 ft) and double random (36–40 ft). We also cut 6 m or any custom length. As a stainless steel seamless pipes supplier in India, we hold common grades and schedules in stock, subject to availability.
| Product | Size Range | Schedules | Lengths | Condition |
|---|---|---|---|---|
| 304 / 304L Seamless Pipes | 1/8" to 24" NPS | 5S to XXS | Random / 6 m / custom | Annealed and pickled |
| 316 / 316L Seamless Pipes | 1/8" to 24" NPS | 5S to XXS | Random / 6 m / custom | Annealed and pickled |
| 321 / 347 and H-Grade Pipes | 1/2" to 24" NPS | 10S to XXS | Random / 6 m / custom | Annealed and pickled |
| 904L / SMO 254 Pipes | 1/2" to 12" NPS | 10S to 80S | Random / 6 m / custom | Annealed and pickled |
| Duplex and Super Duplex Pipes | 1/2" to 24" NPS | 10S to XXS | Random / 6 m / custom | Annealed and pickled |
| Cold Drawn Bright Annealed Pipes | 1/4" to 6" OD | Thin to medium | 6 m / exact cut | Bright annealed |
Stainless Steel Seamless Pipes We Manufacture and Supply
| Product | Grades | Standard | Typical Finish |
|---|---|---|---|
| Austenitic Seamless Pipes | 304, 304L, 316, 316L, 317L | ASTM A312 | Annealed, pickled, passivated |
| Stabilised Seamless Pipes | 321, 321H, 347, 347H, 316Ti | ASTM A312, A376 | Annealed, pickled |
| High-Temperature Seamless Pipes | 304H, 316H, 321H, 347H | ASTM A376 | Annealed, pickled |
| High-Alloy Seamless Pipes | 904L, SMO 254 | ASTM A312 | Annealed, pickled |
| Duplex Seamless Pipes | 2304, 2205 | ASTM A790 | Annealed, pickled |
| Super Duplex Seamless Pipes | 2507 | ASTM A790 | Annealed, pickled |
| Polished and Bright Annealed Pipes | 304, 316L | ASTM A312 | Polished or bright annealed |
Each product ships with the stencil, heat number, and test reports your standard requires, with bevelled or plain ends, and capped for transit.
Applications of Stainless Steel Seamless Pipes
- Chemical and Petrochemical Plants: Carry acids, solvents, and reactive fluids under pressure.
- Oil and Gas: Serve process, instrument, and umbilical lines, including sour service.
- Pharmaceutical and Biotech: Keep product clean in water-for-injection and process lines.
- Food, Dairy and Beverage: Resist daily washing and cleaning chemicals.
- Power Plants: Run high-temperature steam lines in H-grade pipes.
- Desalination and Water Treatment: Resist chlorides and brine in duplex and 904L pipes.
- Shipbuilding and Offshore: Stand up to seawater and salt spray.
- Cryogenic and LNG Plants: Stay tough at -196°C.
- Pulp, Paper and Fertilizer Plants: Resist bleach, acids, and hot liquors.
Why Choose Us as Your Stainless Steel Seamless Pipes Manufacturer in India?
Choosing the right Stainless Steel Seamless Pipes Manufacturer in India is important when projects require reliable quality, precise specifications, and consistent supply. We combine more than 20+ years of industry experience with strong manufacturing and sourcing capabilities to support standard, bulk, and project requirements.
- 20+ Years of Experience: Established in 2005, we have extensive experience in industrial pipes and tubes.
- Wide Grade Range: We supply stainless steel, duplex, super duplex, carbon steel, alloy steel, and nickel alloy pipes.
- International Standards: Products are supplied according to applicable ASTM, ASME, ANSI, DIN, and ISO standards.
- Certified Quality Systems: Our certifications include ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV certifications.
- Global Reach: As a supplier in India, we serve customers across 85+ countries.
- Inspection & Documentation: We provide inspection, testing, and material documentation as required.
- Industry Coverage: We serve EPC contractors, manufacturers, fabricators, distributors, and engineering companies across oil & gas, petrochemical, chemical, power, pharmaceutical, marine, construction, and engineering industries.
- Reliable Supply: We focus on material traceability, technical compliance, competitive solutions, and timely delivery.
Countries We Export Stainless Steel Seamless Pipes To
As an experienced Stainless Steel Seamless Pipes Manufacturer, we export industrial pipes and tubes to customers across 85+ countries. We support EPC contractors, distributors, manufacturers, fabricators, engineering companies, and procurement teams with products for demanding industrial applications.
Our export network covers major markets across North America, South America, Europe, the Middle East, Africa, and Asia-Pacific. We supply stainless steel, duplex, super duplex, carbon steel, alloy steel, and nickel alloy pipes and tubes according to applicable ASTM, ASME, ANSI, DIN, and ISO standards.
We handle standard orders, bulk requirements, and project-based supplies with inspection, testing, material documentation, and traceability as required. Our established manufacturing and sourcing capabilities help us provide competitive solutions and dependable delivery for customers worldwide.
Stainless Steel Seamless Pipes FAQs
Common questions about stainless steel seamless pipe grades, schedules, finishes, testing, and supply.
Which stainless steel seamless pipe grade should I choose for chloride service?
Grade 316L suits mild chloride exposure. For seawater, strong brine, or aggressive chloride service, choose duplex 2205, super duplex 2507, or SMO 254 according to the fluid chemistry, temperature, pressure, and project specification.
What is the difference between 304, 304L, and 304H seamless pipe?
304 is the standard grade for general corrosion resistance. 304L has lower carbon for improved corrosion resistance after welding. 304H has controlled higher carbon for improved strength at elevated temperature.
What is the difference between 316L and 316Ti pipe?
316L uses low carbon to reduce the risk of sensitisation after welding. 316Ti uses titanium stabilisation for high-temperature service where resistance to sensitisation is required.
When should I choose seamless pipe instead of welded stainless steel pipe?
Choose seamless pipe for high pressure, high temperature, critical corrosion service, or where the design specification requires no longitudinal weld. Welded pipe is often suitable for moderate-duty, larger-size, or cost-led applications.
What does solution annealed and pickled mean?
Solution annealing heats stainless steel to dissolve harmful precipitates and then cools it rapidly to restore corrosion resistance. Pickling removes heat tint and scale from the surface after heat treatment.
Can stainless steel seamless pipes be used for sour service?
Yes, when the selected grade, hardness, heat treatment, and testing meet the applicable NACE MR0175 / ISO 15156 requirements. The final selection depends on H2S level, chloride content, pH, pressure, temperature, and project specification.
What schedules of stainless steel seamless pipe are available?
We supply SCH 5S, 10S, 40S, 80S, SCH 160, XXS, and custom wall thicknesses, subject to grade, size, and availability.
How do I calculate stainless steel seamless pipe weight?
For 304 stainless steel, use: Weight (kg/m) = (OD − Wall) × Wall × 0.02491, where OD and wall thickness are in millimetres. Grade 316 weighs about 1% more.
Which certificate comes with stainless steel seamless pipes?
Every order ships with an EN 10204 3.1 certificate. EN 10204 3.2 certification with third-party inspection can be arranged on request.
Are you a stainless steel seamless pipes manufacturer or a supplier?
Both. We manufacture and supply stainless steel seamless pipes in common grades and sizes, with ready stock subject to availability.
Do you export stainless steel seamless pipes outside India?
Yes. We export stainless steel seamless pipes to customers in