Table of Contents
- Introduction
- Chemical Composition
- Mechanical Properties
- Physical & Thermal Properties
- Equivalent Grades
- Welded Pipes Details
- Manufacturing Process
- Sizes & Dimensions
- Weight Chart
- Pressure Rating
- Types Available
- Applications
- Industries Served
- Grade Comparison
- Why BB Infras?
- Certifications & QC
- Export & Packaging
- Welded Pipes Marking
- Coating Options
- Testing Procedure
- Storage Guidelines
- Downloads
- Cities We Supply
- Countries We Export
- FAQ
- People Also Ask
- Related Products
| Material | Carbon Steel |
| Grade | ASTM A53 Grade B / ASTM A53 Gr.B / ASME SA53 |
| Standard | ASTM A53 Gr.B / ASME SA53 |
| Pipe Type | Welded |
| Size Range | NPS ⅛" – 26" (DN 6 – DN 650) |
| Schedule | SCH 10 – XXS (per ASME B36.10M) |
| Length | SRL (3–5 m) / DRL (6–12 m) / Cut-to-length |
| End Finish | Plain End (PE) / Bevel End (BE) / Threaded (TE) |
| Tensile Strength | 415 MPa min |
| Yield Strength | 240 MPa min |
| MTC | EN 10204 3.1 Mill Test Certificate |
| MOQ | 100 kg (standard sizes) |
Quick Answers
ASTM A53 Grade B Welded Pipes – Overview
ASTM A53 Grade B covers seamless and welded black & hot-dipped galvanised steel pipe for pressure and mechanical applications. Gr.B is the high-strength variant with 415 MPa tensile, used broadly in construction, plumbing and general piping.
BB Infras is a leading ASTM A53 Grade B Welded Pipes supplier, stockist and exporter based in Mumbai, India. We maintain ready stock across popular sizes and schedules, backed by full traceability with EN 10204 3.1 Mill Test Certificates. We supply ASTM A53 Grade B Welded Pipes in schedules SCH 10 through XXS, in lengths from 3 m single random to 6 m double random, with plain end, bevel end or threaded end as required. PE/BE/TE pipes are stocked for same-day dispatch.
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Request Quote WhatsAppChemical Composition of ASTM A53 Grade B
The following table shows the chemical composition per ASTM A53 Gr.B / ASME SA53.
| C | Mn | P | S | Cu | Ni | Cr | Mo | V |
|---|---|---|---|---|---|---|---|---|
| ≤ 0.30 | ≤ 1.20 | ≤ 0.050 | ≤ 0.045 | ≤ 0.40 | ≤ 0.40 | ≤ 0.40 | ≤ 0.15 | ≤ 0.08 |
Mechanical Properties of ASTM A53 Grade B
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa min |
| Yield Strength | 240 MPa min |
| Elongation | 30% min |
Physical & Thermal Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1420–1540 °C |
| Thermal Conductivity | 49 W/m·K |
| Thermal Expansion | 12.0 × 10⁻⁶ /°C |
| Elastic Modulus | 200 GPa |
| Specific Heat | 480 J/kg·K |
| Electrical Resistivity | 0.172 μΩ·m |
Equivalent Grades of ASTM A53 Grade B
| Standard Body | Equivalent Grade |
|---|---|
| ASTM/ASME | A53/SA53 |
| EN | P235TR1 / 1.0254 |
| API | 5L Gr.B |
| IS | 1239 Part 1 |
| BS | 3601 320 |
Welded Pipes – Product Details
Applicable Standards: ASTM A53, ASTM A672, API 5L, EN 10217, IS 3589
Manufacturing Process: UOE (U-press, O-press, Expand) or spiral forming of plates/coils, followed by SAW or GMAW seam welding and hydrostatic testing.
Heat Treatment: Stress relieve ERW at ≥ 540 °C or normalise; seamless as-rolled.
ASTM A53 Grade B Welded Pipes – Manufacturing Process
Welded Pipes is produced using a controlled sequence of operations to achieve the dimensional and mechanical requirements of ASTM A53 Gr.B / ASME SA53.
Internal & External
Per standard
ASTM A53 Grade B Welded Pipes – Sizes & Dimensions
Size range: NPS ⅛" – 26" (DN 6 – DN 650). The following dimensional data covers standard sizes. Non-standard sizes available on request.
| NPS | OD (mm) | Common WT (mm) | Max Pressure (approx) |
|---|---|---|---|
| 2" | 60.3 | 3.91 | PN 100 |
| 6" | 168.3 | 7.11 | PN 64 |
| 12" | 323.9 | 9.53 | PN 40 |
| 18" | 457.2 | 9.53 | PN 25 |
| 24" | 609.6 | 9.53 | PN 16 |
| 36" | 914.4 | 12.70 | PN 16 |
| 48" | 1219.2 | 14.27 | PN 10 |
ASTM A53 Grade B Welded Pipes – Weight Chart
Weight per metre (kg/m) for common sizes and schedules. Formula: W = 0.02466 × t × (OD − t) where t = wall thickness (mm), OD = outside diameter (mm).
| NPS | OD (mm) | SCH 40 WT (mm) | SCH 40 kg/m |
SCH 80 WT (mm) | SCH 80 kg/m |
SCH 160 WT (mm) | SCH 160 kg/m |
|---|---|---|---|---|---|---|---|
| ½" | 21.3 | 2.77 | 1.27 | 3.73 | 1.62 | 4.78 | 1.95 |
| ¾" | 26.7 | 2.87 | 1.69 | 3.91 | 2.20 | 5.56 | 2.90 |
| 1" | 33.4 | 3.38 | 2.50 | 4.55 | 3.24 | 6.35 | 4.24 |
| 1½" | 48.3 | 3.68 | 4.05 | 5.08 | 5.41 | 7.14 | 7.25 |
| 2" | 60.3 | 3.91 | 5.44 | 5.54 | 7.48 | 8.74 | 11.11 |
| 3" | 88.9 | 5.49 | 11.29 | 7.62 | 15.27 | 11.13 | 21.35 |
| 4" | 114.3 | 6.02 | 16.07 | 8.56 | 22.32 | 13.49 | 33.57 |
| 6" | 168.3 | 7.11 | 28.26 | 10.97 | 42.56 | 14.27 | 54.20 |
| 8" | 219.1 | 8.18 | 42.55 | 12.70 | 64.64 | 15.09 | 75.92 |
| 10" | 273.1 | 9.27 | 60.31 | 12.70 | 81.55 | 15.09 | 95.97 |
| 12" | 323.9 | 9.53 | 73.78 | 12.70 | 97.44 | 17.48 | 132.05 |
* Weights are approximate and calculated per ASME B36.10M. Actual weights may vary ±2% depending on mill tolerance.
ASTM A53 Grade B Welded Pipes – Pressure Rating
Allowable working pressure (bar) per ASME B31.3 at ambient temperature (38 °C). Pressure reduces at elevated temperature — consult ASME B31.3 Table A-1.
| NPS | OD (mm) | SCH 40 WT (mm) | SCH 40 Pressure (bar) |
SCH 80 WT (mm) | SCH 80 Pressure (bar) |
SCH 160 WT (mm) | SCH 160 Pressure (bar) |
|---|---|---|---|---|---|---|---|
| ½" | 21.3 | 2.77 | 300 | 3.73 | 403 | 4.78 | 517 |
| ¾" | 26.7 | 2.87 | 248 | 3.91 | 337 | 5.56 | 480 |
| 1" | 33.4 | 3.38 | 233 | 4.55 | 314 | 6.35 | 438 |
| 1½" | 48.3 | 3.68 | 176 | 5.08 | 242 | 7.14 | 341 |
| 2" | 60.3 | 3.91 | 149 | 5.54 | 212 | 8.74 | 334 |
| 3" | 88.9 | 5.49 | 142 | 7.62 | 197 | 11.13 | 288 |
| 4" | 114.3 | 6.02 | 121 | 8.56 | 173 | 13.49 | 272 |
| 6" | 168.3 | 7.11 | 97 | 10.97 | 150 | 14.27 | 195 |
| 8" | 219.1 | 8.18 | 86 | 12.70 | 134 | 15.09 | 159 |
| 10" | 273.1 | 9.27 | 78 | 12.70 | 107 | 15.09 | 127 |
| 12" | 323.9 | 9.53 | 68 | 12.70 | 90 | 17.48 | 124 |
* Pressures are indicative, calculated using Barlow's formula with 72% SMYS design factor. For engineering design, refer to ASME B31.3 / B31.1.
Types of ASTM A53 Grade B Welded Pipes
- ERW welded
- SAW / LSAW
- HSAW / Spiral welded
- Double-submerged arc welded (DSAW)
Applications of ASTM A53 Grade B Welded Pipes
Industries We Serve
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Email Quote Call NowASTM A53 Grade B – Grade Specification
| Standard | Category | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|---|
| ASTM A53 Gr.B / ASME SA53 ✓ | Carbon Steel | 415 MPa min | 240 MPa min | 30% min |
| ASTM/ASME (A53/SA53) | Equivalent | See equivalent grades table above | ||
| EN (P235TR1 / 1.0254) | Equivalent | See equivalent grades table above | ||
| API (5L Gr.B) | Equivalent | See equivalent grades table above | ||
| IS (1239 Part 1) | Equivalent | See equivalent grades table above | ||
| BS (3601 320) | Equivalent | See equivalent grades table above | ||
* All values are minimum guaranteed per ASTM A53 Gr.B / ASME SA53. Actual mill certificates may show higher values.
Why Buy ASTM A53 Grade B Welded Pipes from BB Infras?
| Ready Stock | Large inventory of ASTM A53 Grade B Welded Pipes in popular sizes maintained in our Mumbai warehouse for immediate dispatch. |
| Certified Material | All material supplied with EN 10204 3.1 Mill Test Certificates from NABL-accredited labs. TPI by SGS, BV, TUV on request. |
| Worldwide Export | We export ASTM A53 Grade B Welded Pipes to 80+ countries with complete export documentation — COO, packing list, B/L, fumigation certificates. |
| Competitive Pricing | Direct mill sourcing and bulk buying ensures competitive prices. No middlemen. Transparent pricing with no hidden charges. |
| Fast Delivery | Standard sizes dispatched within 3–5 business days. Custom sizes within 3–4 weeks. Urgent orders accommodated. |
| Value-Added Services | Cut-to-length, bevelling, threading, galvanising, painting, marking & stencilling available in-house. |
| Technical Support | Our metallurgical team assists with grade selection, standard interpretation, and material substitution queries. |
| MSME Registered | Registered MSME supplier. Eligible for GeM portal procurement and government tenders. |
Certifications & Quality Inspection
Every ASTM A53 Grade B Welded Pipes supplied by BB Infras undergoes the following quality controls:
Quality Inspection Checklist
- Chemical composition analysis (OES / wet analysis)
- Mechanical testing: tensile, yield, elongation, impact
- Dimensional inspection per applicable ASME standard
- Visual and surface finish inspection
- Hydrostatic or pneumatic pressure testing
- Non-Destructive Testing: UT, RT, MT, PT on request
- Positive Material Identification (PMI) on request
Export Packaging & MOQ
- Minimum Order Quantity (MOQ): 100 kg or 1 piece (standard sizes); 500 kg for custom sizes
- Packing for Pipes/Tubes: Bundled with steel strapping, plastic end caps, moisture-proof wrapping
- Packing for Fittings/Flanges: Wooden box / wooden pallet, plywood case for heavy items
- Sea Freight: FCL / LCL container, fumigation certificate provided
- Air Freight: Available for urgent requirements
- Documents: Commercial Invoice, Packing List, Certificate of Origin, MTC, Bill of Lading, Insurance Certificate
- Marking: Heat number, grade, size, schedule, standard per ASTM A5.40 / ASME marking requirements
Welded Pipes Marking & Identification
Every ASTM A53 Grade B Welded Pipes supplied by BB Infras is marked per ASTM A53 Gr.B / ASME SA53 and ASME marking requirements. Standard marking sequence:
- Manufacturer name / mark — BB Infras or mill of origin
- Specification — ASTM A53 Gr.B
- Grade — ASTM A53 Grade B
- Type — E (ERW)
- Size & schedule — NPS × SCH or wall thickness
- Heat / lot number — for full traceability to MTC
- Length — actual pipe length in metres
- NDE symbol — if nondestructive examination was performed
Coating & Surface Finish Options
| Coating Type | Standard | Application | Lead Time |
|---|---|---|---|
| Black (Mill Finish) | Per standard | General service, indoor piping | In Stock |
| Hot-Dipped Galvanised (HDG) | ASTM A123 | Outdoor, water & plumbing | 3–5 days |
| Oil Coated | — | Export transit corrosion protection | In Stock |
| FBE (Fusion Bonded Epoxy) | CSA Z245.20 | Underground water/gas pipelines | 2–3 weeks |
| 3LPE (3-Layer Polyethylene) | DIN 30670 | Buried oil & gas pipelines | 2–3 weeks |
| Coal Tar Epoxy | AWWA C203 | Offshore & marine | 1–2 weeks |
Testing & Inspection Procedure
All ASTM A53 Grade B Welded Pipes supplied by BB Infras undergo a multi-stage inspection and testing process before dispatch:
| # | Test / Inspection | Standard / Method | Acceptance |
|---|---|---|---|
| 1 | Chemical Composition (OES) | ASTM E415 | Per ASTM A53 Gr.B Table 1 |
| 2 | Tensile & Yield Strength | ASTM E8 | ≥415 MPa min / ≥240 MPa min |
| 3 | Elongation | ASTM E8 | ≥30% min |
| 4 | Hardness (HB) | ASTM E10 | Per standard max |
| 5 | Hydrostatic Test | ASTM A53 Gr.B / ASME B31.3 | Leak-free at test pressure |
| 6 | Dimensional Inspection | ASME B36.10M | Within tolerance |
| 7 | Visual & Surface | ASTM A530 / MSS SP-55 | Free from defects |
| 8 | Ultrasonic Testing (UT) | ASTM E213 (on request) | No sub-surface defects |
| 9 | PMI (XRF) | ASTM E1476 (on request) | Grade confirmation |
Storage & Handling Guidelines
- Store on wooden dunnage or pipe racks — never directly on concrete to avoid moisture-induced corrosion.
- Stack with appropriate separators; observe safe stack heights to prevent deformation.
- Apply plastic end caps or plugs to all open ends to prevent ingress of moisture, dust and insects.
- Keep material dry and ventilated; store under cover in humid or coastal climates.
- Use nylon slings or padded lifting hooks — never bare wire rope directly on surface.
- For long-term storage (>6 months), re-apply protective oil coating or wrap with VCI (Vapour Corrosion Inhibitor) film.
- Identify items with heat number tags throughout storage for full MTC traceability.
Downloads & Technical Resources
Request product documentation from our technical team. Available on enquiry:
Contact our technical team with your enquiry details and we will share the relevant document within 24 hours.
ASTM A53 Grade B Welded Pipes Supplier in India
BB Infras supplies ASTM A53 Grade B Welded Pipes to customers across India from our Mumbai stockyard. We serve all major industrial hubs — refineries in Jamnagar and Haldia, petrochemical clusters in Dahej and Panipat, shipyards in Kochi and Visakhapatnam, and fabrication workshops across Pune, Rajkot, Surat and Coimbatore — with same-day quotation and fast dispatch.
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ASTM A53 Grade B Welded Pipes Exporter – Countries We Ship To
BB Infras exports ASTM A53 Grade B Welded Pipes to 80+ countries with complete export documentation — Certificate of Origin, Material Test Certificate, Packing List, Bill of Lading and Fumigation Certificate. We are a trusted exporter to UAE, Saudi Arabia, Qatar, Oman and Kuwait in the Middle East; to Singapore, Malaysia, Indonesia and Vietnam in Southeast Asia; to South Africa, Nigeria and Kenya in Africa; and to the USA, UK, Germany and Netherlands in Europe and North America.
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Frequently Asked Questions
Get the best price for ASTM A53 Grade B Welded Pipes
Talk to our sales team — available Mon–Sat, 9 AM – 7 PM IST. Same-day quotes.
Contact Us Today +91-9152677155People Also Ask
Is ASTM A53 Grade B pipe seamless or welded?
ASTM A53 Grade B is available in both seamless and welded (ERW, SAW) forms under ASTM A53 Gr.B / ASME SA53. BB Infras stocks seamless Welded Pipes and welded variants. Seamless offers higher burst pressure and superior fatigue resistance.
What schedules are available for ASTM A53 Grade B Welded Pipes?
Per ASME B36.10M: SCH 10, 20, 30, 40 (Standard), 60, 80 (Extra Strong), 100, 120, 140, 160 and XXS. BB Infras stocks SCH 40 and SCH 80 in popular sizes for immediate dispatch.
Can ASTM A53 Grade B pipe be hot-dip galvanised?
Yes. Galvanising per ASTM A123 is available. Galvanised ASTM A53 Grade B pipe is suitable for water supply, plumbing and outdoor structural applications. Specify HDG at time of enquiry.
What is the tensile and yield strength of ASTM A53 Grade B?
Per ASTM A53 Gr.B: minimum tensile is 415 MPa min and minimum yield is 240 MPa min. Actual mill certificates typically show values 5–15% above the standard minimum.
What is the price of ASTM A53 Grade B Welded Pipes in India?
Prices vary by size, schedule, quantity and current steel market rates. Contact BB Infras for a firm quotation from our Mumbai stockyard.
Authoritative Standards Referenced
| Standard | Issuing Body | Scope |
|---|---|---|
| ASTM A53 Gr.B / ASME SA53 | ASTM / ASME | Material specification for ASTM A53 Grade B |
| ASME B36.10M | ASME | Welded and seamless wrought steel pipe — dimensional standard |
| ASTM A530 | ASTM | General requirements for specialised carbon and alloy steel pipe |
| EN 10204:2004 | CEN | Metallic products — types of inspection documents (3.1 MTC) |
| NACE MR0175 / ISO 15156 | NACE/ISO | Materials for H₂S service in oil and gas production |
