Home > Welded Pipes > BS 3601 & BS 3602
Inox Steel India is a leading manufacturer and global supplier of BS 3601 and BS 3602 Welded Carbon Steel Pipes, used in structural applications, low-to-high pressure pipelines, boilers, steam lines, petroleum lines, and general engineering.
These British Standard pipes are engineered for environments requiring leak-proof performance, controlled chemistry, reliable weld strength, and consistent mechanical properties. Manufactured using ERW, HFW, and SAW processes, our pipes fully comply with the dimensional and testing requirements of BS 3601 and BS 3602, making them suitable for a wide range of pipelines and heavy-duty structural applications.
We export BS-grade pipes extensively across UK, Europe, Middle East, Africa, and Southeast Asia, supporting EPC contractors, engineering consultants, and industrial end users.
✔ BS 3601 – General Purpose Pressure Pipes
BS 3601 covers welded carbon steel pipes for:
Available Grades:
These grades offer reliable strength for standard pressure and structural systems.
✔ BS 3602 – Higher Grade Pressure Pipes
BS 3602 is used for higher-pressure and more demanding applications, such as:
Available Grades:
These grades provide enhanced tensile strength, impact resistance, and weld reliability.
To match your seamless-pipe sample style, here is a step-by-step explanation:
Raw Material Inspection
High-quality carbon steel coils/plates are tested for:
Slitting & Forming
Steel strips are slit and passed through forming rolls to create a circular pipe.
ERW / HFW / SAW Welding
Bead Trimming
Internal & external bead removal for smoother flow and aesthetics.
Heat Treatment
Ensures ductility, weld toughness, and grain refinement.
Hydrostatic Testing
Every pipe is hydro-tested for pressure integrity.
NDT Testing
Surface Protection
Pipes are supplied in:
Final Inspection & Marking
Each pipe is marked with:
Grade • Size • Batch No. • Standard • Heat No.
✔ Structural Engineering
✔ Pressure Lines
✔ High-Pressure & High-Temperature Lines (BS 3602)
✔ Industrial & Process Piping
BS 3601 is ideal for general-purpose pressure lines, whereas BS 3602 is designed for higher pressure, thermal, and industrial service.
| Parameter / Property | BS 3601 | BS 3602 |
|---|---|---|
| Standard Title | Carbon Steel Pipes for Pressure Purposes | Carbon Steel Pipes for Pressure Purposes (Higher Grades & Requirements) |
| Primary Use | General pressure, low/medium duty | Industrial pressure lines, boilers, petroleum |
| Grades Available | 320 • 360 • 410 | 360 • 410 • 430 • 460 |
| Material Type | Non-alloy carbon steel | Non-alloy carbon steel |
| Manufacturing Process | ERW / HFW / SAW Welded | ERW / SAW Welded |
| Pipe Type | Welded Pressure Pipe | Welded Pressure Pipe |
| Diameter Range (OD) | 21.3 mm – 508 mm | 33.7 mm – 1219 mm |
| Wall Thickness Range | 2.0 mm – 12.5 mm | 3.2 mm – 25 mm |
| Delivery Condition | As-welded / Normalized | Normalized / Stress Relieved |
| Tensile Strength | 320–410 MPa | 360–460 MPa |
| Yield Strength | 200–240 MPa | 230–275 MPa |
| Elongation | Min 20% | Min 20% |
| Impact Test | Optional | Mandatory at specified temps |
| Hydrostatic Test | Mandatory | Mandatory |
| NDT Testing | Weld seam UT/EC | UT/RT per project |
| Surface Finish | Black / Painted / Varnish | Black / Painted / Varnish |
| End Condition | PE / BE | PE / BE |
| Coating Options | Black, Epoxy, 3LPE (optional) | Black, Epoxy, 3LPE (optional) |
| Typical Applications | Structural piping, low-pressure lines | Boilers, pressure lines, petroleum, industrial process |
| Documentation | MTC 3.1 | MTC 3.1 / 3.2 |
| HSN Code | 7306 | 7306 |
The datasheet summarises the chemical, mechanical, dimensional, and testing requirements of BS 3601 (general pressure) and BS 3602 (high-pressure & thermal service), helping engineers, consultants, and EPC buyers choose the correct grade.
Outside Diameter (OD)
Wall Thickness (WT)
Length Options
End Finishes
Surface Condition
(Aligned with BS 3601 & BS 3602 carbon steel requirements)
| Element | BS 3601 | BS 3602 |
|---|---|---|
| Carbon (C) | 0.20 – 0.25% | 0.22 – 0.30% |
| Manganese (Mn) | 0.35 – 1.20% | 0.40 – 1.50% |
| Sulphur (S) | 0.040% max | 0.035% max |
| Phosphorus (P) | 0.040% max | 0.035% max |
| Silicon (Si) | 0.10 – 0.35% | 0.10 – 0.40% |
| Property | BS 3601 (Grade 320 / 360 / 410) | BS 3602 (Grade 360 / 410 / 430 / 460) |
|---|---|---|
| Tensile Strength | 320–410 MPa | 360–460 MPa |
| Yield Strength | 200–240 MPa | 230–275 MPa |
| Elongation | ≥ 20% | ≥ 20% |
| Impact Test | Optional | Mandatory (temp-specific) |
| Hardness | ≤ 90 HRB | ≤ 95 HRB |
| Grade | Category | Strength Level | Application Type |
|---|---|---|---|
| BS 3601 Grade 320 | General Pressure | Low Strength | Structural / low-pressure |
| BS 3601 Grade 360 | General Pressure | Medium | Industrial pressure lines |
| BS 3601 Grade 410 | Higher Strength | Medium-High | Structural + pressure lines |
| BS 3602 Grade 360 | High-Pressure | Medium-High | Boilers & steam lines |
| BS 3602 Grade 410 | High-Pressure | High | Refineries, petrochemical |
| BS 3602 Grade 430 | High-Pressure | Higher | Heavy industrial pipelines |
| BS 3602 Grade 460 | High-Pressure | Highest | High-temperature & high-stress pipelines |
| Pipe Type | Price (INR/kg) | Price (USD/kg) |
|---|---|---|
| BS 3601 Grade 320 | ₹ 60 – ₹ 85 | $ 0.80 – $ 1.15 |
| BS 3601 Grade 360 | ₹ 65 – ₹ 95 | $ 0.85 – $ 1.35 |
| BS 3601 Grade 410 | ₹ 70 – ₹ 110 | $ 0.95 – $ 1.55 |
| BS 3602 Grade 360/410 | ₹ 75 – ₹ 125 | $ 1.00 – $ 1.75 |
| BS 3602 Grade 430/460 | ₹ 85 – ₹ 150 | $ 1.20 – $ 2.10 |
| Epoxy Coating | +₹ 10 – ₹ 25 | +$ 0.15 – $ 0.35 |
| 3LPE Coating | +₹ 20 – ₹ 50 | +$ 0.30 – $ 0.75 |
Prices depend on OD, WT, grade, heat treatment, project testing & coating.
✔ Mandatory Tests — Both Standards
✔ Additional Tests for BS 3602
✔ Documentation
Countries We Export To
Middle East:
Africa:
Europe:
Americas:
Asia Pacific:
Industries Using BS 3601 / 3602 Pipes
Inox Steel India is one of the most trusted manufacturers and global exporters of BS 3601 & BS 3602 Welded Carbon Steel Pipes, supplying to EPC contractors, refineries, boiler manufacturers, structural steel fabricators, and industrial plants across the globe.
Reasons Why Global Buyers Prefer Us:
Our BS graded pipes deliver consistent quality, pressure reliability, and long service life, making them suitable for both structural and high-pressure industrial applications.
✔ Structural Engineering Applications
✔ General Pressure Lines (BS 3601)
✔ High-Pressure & High-Temperature Lines (BS 3602)
✔ Process & Utility Lines
The combination of high tensile strength, durable weld seam, and strict British Standard compliance makes these pipes an ideal choice for demanding environments.
✔ Standard Packing
✔ Enhanced Protection for Export
✔ Large Diameter Packing
✔ Markings Provided
✔ Ports Used
JNPT • Mundra • Hazira • Chennai • Vizag
Looking for BS 3601 / BS 3602 Welded Carbon Steel Pipes for your project?
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in
+91 9930796690
Inox Steel India
Email
Phone
Yes — BS 3602 (Grade 410/430/460) is widely used for boilers and steam lines.
ERW • HFW • SAW welded, depending on OD & thickness.
Yes — SGS, BV, TUV, DNV, Lloyd’s inspection available.
Yes — from 3m to 18m, depending on the project requirement.
We supply certified, tested, and globally compliant BS grade welded pipes with fast delivery.