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IS 2062 E350 Long Weld Neck Flange Supplier, Stockist & Exporter in Mumbai, India

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Long Weld Neck Flange in Other Grades

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Table of Contents

  1. Introduction
  2. Chemical Composition
  3. Mechanical Properties
  4. Physical & Thermal Properties
  5. Equivalent Grades
  6. Long Weld Neck Flange Details
  7. Manufacturing Process
  8. Sizes & Dimensions
  9. Types Available
  10. Applications
  11. Industries Served
  12. Grade Comparison
  13. Why BB Infras?
  14. Certifications & QC
  15. Export & Packaging
  16. Long Weld Neck Flange Marking
  17. Coating Options
  18. Testing Procedure
  19. Storage Guidelines
  20. Downloads
  21. Cities We Supply
  22. Countries We Export
  23. FAQ
  24. People Also Ask
  25. Related Products
Verified by BB Infras Technical Team  •  Regularly reviewed & updated
IS 2062 E350 Long Weld Neck Flange – Weld Neck Flange Supplier India
IS 2062 E350 Long Weld Neck Flange – Weld Neck Flange Supplier India IS 2062 E350 Long Weld Neck Flange – Flanges Supplier India IS 2062 E350 Long Weld Neck Flange – Flange Close-up Detail Blind Flange – Ready Stock BB Infras Steel Flanges & Pipes – BB Infras Mumbai
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MaterialIndian Standard High-Strength Steel
GradeIS 2062 E350 / IS 2062:2011 E350
StandardIS 2062:2011 E350
TypeLong Weld Neck Flange
Size RangePlates 5–100 mm; angles, channels and beams
Pressure Class150# – 2500# (ASME B16.5)
FacingRF / FF / RTJ
Dimensional StdASME B16.5 / B16.47
Tensile Strength490–630 MPa
Yield Strength350 MPa min
MTCEN 10204 3.1 Mill Test Certificate
MOQ100 kg (standard sizes)

Quick Answers

What is IS 2062 E350 Long Weld Neck Flange?
A long weld neck flange manufactured to IS 2062:2011 E350. IS 2062 E350 provides 350 MPa minimum yield strength — India's high-strength structural grade for demanding fabrications such as crane girders, storage tanks, offshore jackets and heavy structural members requiring impro
What sizes does BB Infras stock?
BB Infras stocks IS 2062 E350 Long Weld Neck Flange in sizes Plates 5–100 mm; angles, channels and beams. Same-day quotation from our Mumbai stockyard.
What is the MOQ and delivery time?
MOQ is 100 kg or 1 piece for standard sizes. Standard sizes dispatched within 3–5 business days from our Mumbai stockyard.

IS 2062 E350 Long Weld Neck Flange – Overview

IS 2062 E350 provides 350 MPa minimum yield strength — India's high-strength structural grade for demanding fabrications such as crane girders, storage tanks, offshore jackets and heavy structural members requiring improved strength over E250.

BB Infras is a recognised IS 2062 E350 Long Weld Neck Flange stockist supplying fabricators, EPC contractors and OEMs across India. All stock is sourced directly from SAIL, TATA Steel and JSPL with NABL-accredited lab test certificates. IS 2062 E350 Long Weld Neck Flange is available in pressure classes 150# to 2500# per ASME B16.5 / B16.47, with raised face (RF), flat face (FF) or ring type joint (RTJ) facing options. Custom bore and custom OD flanges are available on order.

IS 2062:2011 E350 Indian Standard High-Strength Steel Sizes: Plates 5–100 mm; angles, channels and beams EN 10204 3.1 MTC Export Ready

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Chemical Composition of IS 2062 E350

The following table shows the chemical composition per IS 2062:2011 E350.

CMnSPSiCEQ
≤ 0.20≤ 1.50≤ 0.040≤ 0.040≤ 0.45≤ 0.43

Mechanical Properties of IS 2062 E350

PropertyValue
Tensile Strength490–630 MPa
Yield Strength350 MPa min
Elongation22% min
Charpy (27 J at)0 °C

Physical & Thermal Properties

PropertyValue
Density7.85 g/cm³
Melting Point1420–1530 °C
Thermal Conductivity50 W/m·K
Thermal Expansion11.9 × 10⁻⁶ /°C
Elastic Modulus200 GPa
Specific Heat480 J/kg·K
Electrical Resistivity0.171 μΩ·m

Equivalent Grades of IS 2062 E350

Standard BodyEquivalent Grade
IS2062 E350
ASTMA572 Gr.50
ENS355JR / 1.0045
JISSM490
DINSt52-3

Long Weld Neck Flange – Product Details

Long weld neck (LWN) flanges have an extended hub that functions as a nozzle barrel on pressure vessels and heat exchangers. They eliminate a separate pipe stub weld at the vessel shell, reducing stress concentration and inspection requirements.

Applicable Standards: ASME B16.5, ASME VIII Div.1, ASME B31.3

Manufacturing Process: Forged; extended hub (length specified by engineer); bore machined per pipe schedule; weld prep per ASME B16.25.

Heat Treatment: Normalise for improved notch toughness; TMCP for thick sections.

IS 2062 E350 Long Weld Neck Flange – Manufacturing Process

Long Weld Neck Flange is produced using a controlled sequence of operations to achieve the dimensional and mechanical requirements of IS 2062:2011 E350.

Steel Billet
Heating
1050–1200 °C
Die Forging
Heat Treatment
Normalise / Q&T
CNC Machining
Face & bore
Dimensional Inspection
Per ASME B16.5
NDT & Chemical
MTC & Marking
Packing & Dispatch

IS 2062 E350 Long Weld Neck Flange – Sizes & Dimensions

Size range: Plates 5–100 mm; angles, channels and beams. The following dimensional data covers standard sizes. Non-standard sizes available on request.

NPSFlange RatingHub Extension (mm)Hub OD (mm)No. Bolts
1"150#–2500#75–300424
2"150#–2500#75–400684–8
4"150#–2500#100–5001228
6"150#–1500#125–6001788
8"150#–1500#150–7002298
12"150#–900#200–90034012

Types of IS 2062 E350 Long Weld Neck Flange

  • LWN for pressure vessel nozzles
  • LWN for heat exchanger channels
  • LWN for column manways

Applications of IS 2062 E350 Long Weld Neck Flange

Pressure vessel nozzles
Heat exchanger channel necks
Reactor vessel connections
Column & drum nozzles
High-fatigue cyclic-service nozzles

Industries We Serve

Oil & Gas
Petrochemical
Power Generation
Chemical
Marine & Offshore
Construction
Water & Sewage
Pharmaceutical
Food & Beverage
Automotive
Fertiliser
Cryogenic / LNG

Ready to order IS 2062 E350 Long Weld Neck Flange?

Stock available in Mumbai. Same-day quotation. Export documentation included.

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IS 2062 E350 – Grade Specification

StandardCategory Tensile StrengthYield StrengthElongation
IS 2062:2011 E350 ✓ Indian Standard High-Strength Steel 490–630 MPa350 MPa min22% min
IS (2062 E350) Equivalent See equivalent grades table above
ASTM (A572 Gr.50) Equivalent See equivalent grades table above
EN (S355JR / 1.0045) Equivalent See equivalent grades table above
JIS (SM490) Equivalent See equivalent grades table above
DIN (St52-3) Equivalent See equivalent grades table above

* All values are minimum guaranteed per IS 2062:2011 E350. Actual mill certificates may show higher values.

Why Buy IS 2062 E350 Long Weld Neck Flange from BB Infras?

Ready Stock Large inventory of IS 2062 E350 Long Weld Neck Flange 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 IS 2062 E350 Long Weld Neck Flange 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 IS 2062 E350 Long Weld Neck Flange supplied by BB Infras undergoes the following quality controls:

ISO 9001:2015 EN 10204 3.1 MTC PED 2014/68/EU NACE MR0175 BIS / IS Marked NABL Lab Reports TPI Available

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

Long Weld Neck Flange Marking & Identification

Every IS 2062 E350 Long Weld Neck Flange supplied by BB Infras is marked per IS 2062:2011 E350 and ASME marking requirements. Standard marking sequence:

BB INFRAS | IS 2062:2011 E350 | 150# | 4" | RF | HEAT: XXXXXX
  • Manufacturer name / mark
  • Material specification — IS 2062:2011 E350
  • Pressure class — 150# / 300# / etc.
  • NPS size
  • Facing type — RF / FF / RTJ
  • Heat / lot number — for MTC traceability

Coating & Surface Finish Options

Coating TypeStandardApplicationLead Time
Mill Finish / Black PaintPer standardGeneral process serviceIn Stock
Yellow Zinc Chromate Primer—Corrosion protection in transitIn Stock
Hot-Dipped Galvanised (HDG)ASTM A123Plumbing & utility service3–5 days
Two-Coat Epoxy Paint—Offshore & chemical plant1–2 weeks

Testing & Inspection Procedure

All IS 2062 E350 Long Weld Neck Flange supplied by BB Infras undergo a multi-stage inspection and testing process before dispatch:

#Test / InspectionStandard / MethodAcceptance
1Chemical Composition (OES)ASTM E415Per IS 2062:2011 E350 Table 1
2Tensile & Yield StrengthASTM E8≥490–630 MPa / ≥350 MPa min
3ElongationASTM E8≥22% min
4Hardness (HB)ASTM E10Per standard max
5Hydrostatic TestIS 2062:2011 E350 / ASME B31.3Leak-free at test pressure
6Dimensional InspectionASME B16.5Within tolerance
7Visual & SurfaceASTM A530 / MSS SP-55Free from defects
8Ultrasonic Testing (UT)ASTM E213 (on request)No sub-surface defects
9PMI (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.

IS 2062 E350 Long Weld Neck Flange Supplier in India

BB Infras supplies IS 2062 E350 Long Weld Neck Flange 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.

View all cities we supply ▾
MumbaiDelhi BangaloreChennai HyderabadPune AhmedabadKolkata SuratJaipur RajkotVadodara CoimbatoreNagpur IndoreBhopal LucknowKanpur PatnaBhubaneswar VisakhapatnamKochi ChandigarhLudhiana AmritsarFaridabad GurgaonNoida AgraNashik AurangabadSolapur BhavnagarJamnagar AnkleshwarHaldia MundraParadip

IS 2062 E350 Long Weld Neck Flange Exporter – Countries We Ship To

BB Infras exports IS 2062 E350 Long Weld Neck Flange 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.

View all export countries ▾
USAUAE Saudi ArabiaQatar KuwaitOman BahrainIraq UKGermany FranceItaly SpainNetherlands BelgiumPoland TurkeyRussia BrazilMexico ArgentinaColombia AustraliaNew Zealand South AfricaNigeria KenyaEgypt MalaysiaSingapore IndonesiaThailand VietnamPhilippines South KoreaJapan BangladeshSri Lanka PakistanCanada NorwaySweden DenmarkSwitzerland AustriaIsrael JordanKazakhstan

Frequently Asked Questions

What is IS 2062 E350 Long Weld Neck Flange?
IS 2062 E350 Long Weld Neck Flange is a long weld neck flange manufactured to the IS 2062:2011 E350 specification. IS 2062 E350 provides 350 MPa minimum yield strength — India's high-strength structural grade for demanding fabrications such as crane girders, storage tanks, offshore jackets and heavy structural members requiring improved strength over E250.
What sizes of IS 2062 E350 Long Weld Neck Flange does BB Infras supply?
BB Infras supplies IS 2062 E350 Long Weld Neck Flange in the size range Plates 5–100 mm; angles, channels and beams. Special sizes are available on request with 3–4 weeks lead time.
What is the chemical composition of IS 2062 E350?
See the chemical composition table above for the complete element breakdown per the standard.
What is the tensile strength of IS 2062 E350 Long Weld Neck Flange?
Per IS 2062:2011 E350, the minimum tensile strength is 490–630 MPa and the yield strength is 350 MPa min.
Do you supply IS 2062 E350 Long Weld Neck Flange with MTC?
Yes. All products are supplied with EN 10204 3.1 Mill Test Certificates. Third-party inspection by SGS, TUV, BV or Lloyd's is available on request.
What is the equivalent grade of IS 2062 E350?
See the equivalent grades table above for ASTM, EN, DIN, JIS and IS cross-references.
What are the applications of IS 2062 E350 Long Weld Neck Flange?
IS 2062 E350 Long Weld Neck Flange is used in: Pressure vessel nozzles, Heat exchanger channel necks, Reactor vessel connections, Column & drum nozzles, High-fatigue cyclic-service nozzles.
What is the heat treatment for IS 2062 E350?
Normalise for improved notch toughness; TMCP for thick sections.
Can BB Infras export IS 2062 E350 Long Weld Neck Flange worldwide?
Yes. BB Infras exports to 80+ countries. We provide all export documentation including COO, packing list, bill of lading and fumigation certificates.
What is the minimum order quantity for IS 2062 E350 Long Weld Neck Flange?
Minimum order quantity is 100 kg or 1 piece for standard sizes. For custom or exotic grades, MOQ may be 500 kg. Contact us for exact pricing.
What schedules or pressure classes are available for IS 2062 E350 Long Weld Neck Flange?
Pressure classes 150# through 2500# per ASME B16.5 are available. Contact us for exact stock availability.
What coating options are available for IS 2062 E350 Long Weld Neck Flange?
IS 2062 E350 Long Weld Neck Flange is available in mill finish (black), hot-dipped galvanised (HDG), oil-coated, FBE and 3LPE coating on request. Specify coating type at time of enquiry.
Do you offer cut-to-length or value-added processing?
Yes. BB Infras offers cut-to-length, bevelling (30° per AWS/ASME), threading (NPT per ASME B1.20.1), grooving, galvanising, painting and stencilling in-house. Custom lengths from 0.5 m to 12 m available.
What are your payment terms and delivery methods?
We accept T/T, L/C at sight, and advance payment. Delivery is ex-works Mumbai or FOB JNPT/Nhava Sheva. For domestic customers we offer road transport; for export we arrange FCL/LCL container with full documentation.
Is IS 2062 E350 suitable for high-temperature service?
IS 2062 E350 is rated per IS 2062:2011 E350. Heat treatment: Normalise for improved notch toughness; TMCP for thick sections.. Contact our technical team for temperature-derated stress values per ASME B31.3 Appendix A.

Get the best price for IS 2062 E350 Long Weld Neck Flange

Talk to our sales team — available Mon–Sat, 9 AM – 7 PM IST. Same-day quotes.

Contact Us Today +91-9152677155
Reviewed by Abhishek Virkar
Industrial Piping Specialist • 12+ Years Experience • BB Infras, Mumbai
This page has been reviewed for technical accuracy against IS 2062:2011 E350 standard requirements. Last updated: June 2026.

People Also Ask

What pressure classes are available for IS 2062 E350 Long Weld Neck Flange?

IS 2062 E350 Long Weld Neck Flange is available in 150#, 300#, 600#, 900#, 1500# and 2500# per ASME B16.5. For NPS > 24", ASME B16.47 Series A/B applies.

What facing options are available?

Available facings: Raised Face (RF), Flat Face (FF) and Ring Type Joint (RTJ). RF is the most common for general service.

What is the tensile and yield strength of IS 2062 E350?

Per IS 2062:2011 E350: minimum tensile is 490–630 MPa and minimum yield is 350 MPa min. Forging heat treatment normalises the material to achieve these values.

Do IS 2062 E350 flanges need PWHT after welding?

PWHT requirements depend on wall thickness and service per ASME B31.3 Section 331. For carbon steel flanges, PWHT typically applies for wall thickness above 19 mm or as specified by the engineer.

What is the price of IS 2062 E350 Long Weld Neck Flange in India?

Prices vary by size, pressure class, quantity and market rates. Contact BB Infras for a firm quotation from our Mumbai stockyard.

Authoritative Standards Referenced

StandardIssuing BodyScope
IS 2062:2011 E350ASTM / ASMEMaterial specification for IS 2062 E350
ASME B16.5ASMEPipe flanges and flanged fittings — NPS ½" – 24"
ASME B16.47ASMELarge diameter steel flanges — NPS 26" – 60"
EN 10204:2004CENMetallic products — types of inspection documents (3.1 MTC)
NACE MR0175 / ISO 15156NACE/ISOMaterials for H₂S service in oil and gas production
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