Home > Seamless Pipe > Carbon Steel Seamless Pipe
(Grades A106 Gr B, A53 Gr B, A333 Gr 6, API 5L Gr B to X65)
Inox Steel India is one of the most trusted manufacturers, suppliers, and global exporters of Carbon Steel Seamless Pipes in India, delivering to industries across the GCC, Middle East, African Nations, Europe, and North & South America.
With an extensive inventory and mill-direct sourcing, we supply ASTM A106 Gr B, A53 Gr B, A333 Gr 6, and API 5L Gr B to X65 seamless pipes for high-temperature, high-pressure and low-temperature applications in Oil & Gas, Petrochemical, Power Generation, Infrastructure, Fertilizer, and Mechanical Engineering projects.
As an ISO, IBR, and PED-certified manufacturer, every pipe supplied by us meets strict metallurgical, dimensional, and performance requirements as per ASTM, ASME, API, and EN standards. Our global clients trust Inox Steel India for consistent quality, documentation, certification, and timely delivery.
A carbon steel seamless pipe is a hollow cylindrical tube produced without any welding seam, making it stronger, more reliable, and safer for high-pressure and high-temperature service. The seamless structure eliminates the risk of weld failures, micro-cracks, and porosity, which is critical in Oil & Gas, refineries, boilers, and power plants.
The process involves:
Below is the complete Technical Datasheet Table comparing all major Carbon Steel Seamless Pipe Grades — ASTM A106 Gr B, A53 Gr B, A333 Gr 6, API 5L Gr B to X65 — for engineering evaluation, project selection, and procurement accuracy.
| Parameter / Property | SS 304 | SS 304L | SS 316 | SS 316L | SS 310 / 310S | SS 321 | SS 347 |
| Standard / Specification | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 |
| Material Type | Austenitic Stainless Steel | Austenitic SS (Low C) | Molybdenum-Bearing SS | Molybdenum-Bearing SS (Low C) | High-Temp Chromium-Nickel SS | Titanium-Stabilized SS | Niobium-Stabilized SS |
| UNS Designation | S30400 | S30403 | S31600 | S31603 | S31000 / S31008 | S32100 | S34700 |
| Equivalent EN / DIN / JIS | 1.4301 / X5CrNi18-10 / SUS304 | 1.4307 / X2CrNi18-9 / SUS304L | 1.4401 / X5CrNiMo17-12-2 / SUS316 | 1.4404 / X2CrNiMo17-12-2 / SUS316L | 1.4841 / X15CrNi25-20 / SUS310S | 1.4541 / X6CrNiTi18-10 / SUS321 | 1.4550 / X6CrNiNb18-10 / SUS347 |
| Chemical Composition (% Max) | C ≤ 0.08, Mn ≤ 2.0, Si ≤ 1.0, Cr 18–20, Ni 8–11 | C ≤ 0.03, Cr 18–20, Ni 8–12 | C ≤ 0.08, Cr 16–18, Ni 10–14, Mo 2–3 | C ≤ 0.03, Cr 16–18, Ni 10–14, Mo 2–3 | C ≤ 0.08, Cr 24–26, Ni 19–22 | C ≤ 0.08, Cr 17–19, Ni 9–12, Ti ≥ 5×C | C ≤ 0.08, Cr 17–19, Ni 9–13, Nb ≥ 10×C |
| Tensile Strength (MPa) | ≥ 515 | ≥ 485 | ≥ 515 | ≥ 485 | ≥ 515 | ≥ 515 | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 | ≥ 170 | ≥ 205 | ≥ 170 | ≥ 205 | ≥ 205 | ≥ 205 |
| Elongation (%) | ≥ 40 | ≥ 40 | ≥ 40 | ≥ 40 | ≥ 40 | ≥ 40 | ≥ 40 |
| Hardness (HRB) | ≤ 90 | ≤ 90 | ≤ 90 | ≤ 90 | ≤ 95 | ≤ 90 | ≤ 90 |
| Corrosion Resistance | Excellent in mild / oxidizing media | Superior weldability (no carbide precipitation) | High pitting & crevice resistance | Exceptional in chloride environments | Outstanding at high temperatures (oxidation-resistant up to 1100 °C) | Resistant to intergranular corrosion after welding | Similar to 321, better creep strength |
| Temperature Range (°C) | −196 °C to +870 °C | −196 °C to +870 °C | −196 °C to +870 °C | −196 °C to +870 °C | up to 1100 °C (intermittent 1150 °C) | up to 870 °C | up to 870 °C |
| Typical Applications | Food Processing, Chemical, Textile, Architecture | Dairy, Pharma, Cryogenic Equipment | Marine, Chemical Process, Pharma | Chloride Process, Shipbuilding, Desalination | Furnaces, Heat Exchangers, Kilns | Heat Exchangers, Exhaust Systems | Pressure Vessels, Petrochemical Plants |
| Available Sizes (NB / OD) | ½″ – 36″ NB / 6 mm – 610 mm | Same | Same | Same | ½″ – 20″ NB | ½″ – 16″ NB | ½″ – 16″ NB |
| Schedules (Thickness) | SCH 5 – SCH XXS | SCH 5 – SCH XXS | SCH 5 – SCH XXS | SCH 5 – SCH XXS | SCH 10 – SCH 160 | SCH 10 – SCH 160 | SCH 10 – SCH 160 |
| End Finishes | Plain, Bevelled, Threaded | Plain, Bevelled, Threaded | Plain, Bevelled, Threaded | Plain, Bevelled, Threaded | Plain, Bevelled | Plain, Bevelled | Plain, Bevelled |
| Testing Requirements | Hydro, Eddy Current, PMI | Hydro, Eddy Current, PMI | Hydro, Eddy Current, PMI | Hydro, Eddy Current, PMI | Hydro, UT, HT | Hydro, UT, PMI | Hydro, UT, PMI |
| Typical HS / HSN Code | 7304.41.00 | 7304.41.00 | 7304.41.00 | 7304.41.00 | 7304.41.00 | 7304.41.00 | 7304.41.00 |
| Equivalent ASTM / ASME | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 | ASTM A312 / A376 |
| Supply Condition | Annealed / Pickled / Polished | Annealed / Pickled / Polished | Annealed / Pickled / Polished | Annealed / Pickled / Polished | Hot Finished / Annealed | Annealed | Annealed |
| Certifications & Docs | MTC EN 10204 3.1 / 3.2, IBR, PED, CE | Same | Same | Same | PED, CE, TPI | IBR, PED, CE | IBR, PED, CE |
This datasheet provides complete insight into mechanical properties, chemical composition, temperature suitability, impact requirements, and certification levels across each grade — ensuring the correct material selection for pipelines, boilers, refineries, cryogenic plants, and high-pressure systems.
Operating Environment:
Pressure Requirement:
Select pipes with adequate wall thickness (SCH 10–XXS) per ASME B36.19 for high-pressure service.
Corrosion & Fluid Type:
Oil, gas, steam, ammonia, hydrocarbon, chilled water lines each require specific grade.
Impact Toughness:
LTCS A333 Gr 6 → mandatory for cryogenic & low temp service
Certification & Documentation:
Ensure MTC 3.1/3.2, IBR, PED, NACE MR0103/MR0175 (if sour service)
Project Standards:
Verify end-user specs: EIL, ONGC, ADNOC, ARAMCO, SABIC, KNPC, BP, TOTAL
India:
GCC & Middle East:
Africa:
Europe & Americas:
Inox Steel India supports global clients with ready stock, inspection support, export documentation, and fast port dispatches (JNPT Mumbai, Mundra, Hazira).
Carbon Steel Seamless Pipes are used across high-pressure, high-temperature, cryogenic, and pipeline transmission systems. Each grade serves a specific function depending on temperature, pressure, fluid type, and impact strength requirements.
SS 304 / 304L Seamless Pipes (ASTM A312 TP304 / TP304L)
ASTM A53 Grade B – General Purpose Low/Medium Pressure Pipe
ASTM A333 Grade 6 – Low Temperature Carbon Steel (LTCS)
API 5L Grade B, X42, X52, X60, X65 – PSL1 & PSL2 Line Pipes
| NPS (Inch) | OD (mm) | Wall (SCH 40) | Weight (kg/m) |
|---|---|---|---|
| ½″ | 21.3 | 2.77 | 1.27 |
| 1″ | 33.4 | 3.38 | 2.48 |
| 2″ | 60.3 | 3.91 | 5.44 |
| 4″ | 114.3 | 6.02 | 14.90 |
| 6″ | 168.3 | 7.11 | 28.26 |
| 8″ | 219.1 | 8.18 | 43.40 |
| 10″ | 273.1 | 9.27 | 63.20 |
| 12″ | 323.9 | 9.53 | 84.25 |
Prices are indicative for standard lengths (6m / 12m), mill finish, and standard schedules.
| Grade / Standard | Size Range (OD) | INR/kg (F.O.B Mumbai) | USD/kg (F.O.B India) | Common Usage |
|---|---|---|---|---|
| ASTM A106 Gr B | 10 – 914 mm | ₹ 110 – ₹ 140 | $1.32 – $1.69 | High-temp service lines |
| ASTM A53 Gr B | 10 – 914 mm | ₹ 100 – ₹ 130 | $1.20 – $1.57 | Water / Structural lines |
| ASTM A333 Gr 6 | 25 – 610 mm | ₹ 160 – ₹ 190 | $1.93 – $2.29 | Low-temperature lines |
| API 5L Gr B – X65 | 25 – 1420 mm | ₹ 180 – ₹ 240 | $2.17 – $2.89 | Oil & Gas pipelines |
Applicable for:
This code applies to import/export clearances in India, GCC, Europe, Africa, and US customs.
Every Carbon Steel Seamless Pipe undergoes mandatory QA/QC testing:
All pipes are supplied with:
📄 MTC EN 10204 3.1 / 3.2
📄 IBR Form II / IIIA (If applicable)
📄 PED CE Certification
📄 Third Party Inspection (SGS/TUV/DNV/Lloyds/BV)
If you are searching for a “carbon steel seamless pipe supplier near Alankar Cinema, Mumbai”, Inox Steel India is one of the most trusted manufacturers and stockists for A106 Gr B, A53 Gr B, A333 Gr 6 and API 5L Gr B–X65.
We deliver across India and export regularly to the UAE, Saudi Arabia, Oman, Qatar, Kuwait, Nigeria, South Africa, Italy, Germany, USA, Brazil, Chile, and Mexico with complete documentation and certifications.
With ready stock of seamless pipes from ½″ NB to 56″ NB, we support EPC contractors, oil & gas operators, refinery projects, mechanical fabricators, and pipeline contractors with fast dispatch, mill test certificates, and competitive pricing.
Your Reliable Partner for Carbon Steel Seamless Pipes
| Industry | Application | Preferred Grade |
|---|---|---|
| Oil & Gas | Transmission Lines • Flow Lines • Offshore Risers | API 5L X42 / X52 / X60 / X65 |
| Refineries & Petrochemicals | High Temp Lines • Steam Piping | A106 Gr B |
| LNG & Cryogenic Plants | Low Temp Piping • Chiller Lines | A333 Gr 6 |
| Mechanical & Fabrication | Structural Piping • Equipment Frames | A53 Gr B |
| Power Plants | Boiler Tubes • Condenser Lines | A106 Gr B |
| Fertilizer Plants | Process Lines • Utility Lines | A106 / API 5L |
| Infrastructure | Firefighting • HVAC • Water Distribution | A53 Gr B |
Our team recommends the best grade based on temperature, pressure, fluid type, corrosion exposure, and code requirements.
We follow international export packaging norms to ensure damage-free delivery:
Regular exports to:
UAE, Oman, Saudi Arabia, Kuwait, Qatar, Bahrain, Nigeria, Kenya, Egypt, South Africa, Germany, UK, Italy, USA, Brazil, Mexico, Peru.
Our technical sales team responds within 24 hours with grade recommendation, price and lead time.
Whether you need A106 Gr B for boilers, A333 Gr 6 for cryogenic service, or API 5L X52/X60/X65 for pipelines, Inox Steel India, we have the inventory and expertise ready.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
ASTM A106 Gr B is used for high-temperature refinery and boiler applications.
7304.19.90 is the standard HSN/HS code for carbon steel seamless piping.
Approx. ₹ 100 – ₹ 240 per kg depending on the grade (A53, A106, A333, API 5L) and wall thickness.
A106 Gr B → High temperature
A53 Gr B → General structural / low pressure
Yes — regular shipments to Dubai, Abu Dhabi, Oman, Nigeria, South Africa, and Kenya.
Yes — HIC/SSC tested pipes are available for sour service (MR0175/MR0103).
Whether you need A106 Gr B for boilers, A333 Gr 6 for cryogenic service, or API 5L X52/X60/X65 for pipelines, Inox Steel India supplies certified, tested, and export-ready seamless pipes with complete documentation.
ISO Certified • IBR Approved • PED CE Marked • Trusted in 65+ Countries