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NTPC Limited steel pipe flanges tender Nalanda Bihar IS 6392 Q3 2026

Bid Publish Date

04-Feb-2026, 6:52 pm

Bid End Date

07-Feb-2026, 7:00 pm

Value

₹2,00,000

Location

NALANDA , BIHAR

Progress

Issue04-Feb-2026, 6:52 pm
AwardPending
Explore all 4 tabs to view complete tender details

Quantity

130

Category

Steel Pipe Flanges as per IS 6392

Bid Type

Single Packet Bid

Key Highlights

  • • Carbon steel flange procurement with IS 6392 compliance and ASME B16.5 Class 150 for water applications
  • • ATC-based quantity flexibility up to 25% and corresponding delivery-extension rules
  • • Material specifications: forgings, castings, rolled plates; carbon steel
  • • Mandatory Material Test Certificate (MTC) and buyer lab acceptance criteria
  • • Payment terms and EMD details require explicit bidder clarity (not specified in data)
  • • OEM authorizations and certificates submission required as per ATC
  • • Delivery scope strictly goods supply; no installation service under scope
  • • Nalanda, Bihar location; specific flange sizes include 80 NB and 100 NB with multiple pressure classes

Categories 9

CARBON STEEL PIPE VALVE PARTS AND ACCESSORIES GALVANISED PIPE SEAMLESS PIPE PIPE FLANGES TUBES AND PIPES PIPE PROJECT STEEL PIPE WATER SUPPLY MATERIAL

Tender Overview

NTPC Limited, Nalanda, Bihar 801301 invites bids for steel pipe flanges in line with IS 6392 (Q3) under the Na department. The procurement covers 80 NB and 100 NB plate/flange varieties, with multiple nominal pressure categories including 0.60, 1.0, 1.6, 2.5, 4.0, 6.4, 10, and 16 N/mm2 for welding neck, plate welding, and screwed boss configurations. Estimated value is ₹200,000; the scope focuses on supply of carbon steel flanges with forgings, castings, and rolled plates per IS 6392 requirements. Key differentiator: ATC specifies ASME B16.5 Class 150 for water uses and material standards related to carbon steel forgings. Unique clauses include option-based quantity adjustments up to 25% and delivery-period adjustments based on original timelines. This tender targets suppliers capable of fulfilling varied flange types with IS 6392 compatibility. This is a government procurement opportunity in the Bihar region, with emphasis on conformance to structural flange sizing, pressure ratings, and material composition.

Technical Specifications & Requirements

  • Flange types: welding neck, plate, screwed boss, slip-on, loose, integral, and blank variants per IS 6392 scope
  • Nominal sizes and pressure ratings: 0.60–16 N/mm2; welding neck and plate flange sizing for welding; plate blank and screwed boss categories included
  • Materials: carbon steel forgings, castings, and rolled plates; domestic material traceability required
  • Standards: IS 6392; ASME B16.5 Class 150 for water uses; material certificates to accompany supply
  • Acceptance criteria: Material Test Certificate (MTC) to be sent with supply; buyer lab testing as sole acceptance criteria; warranty/guarantee terms imply 12 months commissioning or 18 months from supply
  • Quantity hints: ATC clause mentions 80 NB and 100 NB plate flanges with specified counts; other categories may be adjusted
  • Quality control: Certification compliance and bid-specific certificate uploads are mandatory; OEM authorizations may be required
  • Delivery scope: Scopes include only goods supply; delivery/installation terms follow ATC guidelines

Terms, Conditions & Eligibility

  • EMD: Not explicitly stated; ensure clarity on security deposit or online payment terms in bid
  • Delivery: Option to increase quantity up to 25%; delivery-time extension follows the formula (additional time) = (increased quantity/original quantity) × original delivery period, minimum 30 days; extended time allowed within original period
  • Documentation: PAN, GSTIN, canceled cheque, EFT mandate; Material Test Certificate to accompany supply; failure to upload certificates may lead to rejection
  • Warranty & Inspection: Materials guaranteed for 12 months from commissioning or 18 months from supply, whichever earlier; buyer lab tests govern acceptance
  • Scope: Bid price to include all costs for supply of goods only; OEM authorizations may be required; IS 6392 compliance essential
  • Compliance: Bidder must submit all required certificates/documents as per bid document, ATC, and corrigendum; adherence to supplier code and ATC terms mandatory

Key Specifications

    • Category: Item — Type of Flanges, Uses, Class, Design of flanges
    • Materials: Forgings, Casting, Rolled Plates (carbon steel)
    • Nominal Size options: welding neck and plate flanges across multiple N/mm2 ratings (0.60, 1.0, 1.6, 2.5, 4.0, 6.4, 10, 16)
    • Plate flanges for welding: 0.60–16 N/mm2; Plate blank and Screw Boss variants included
    • Screwed boss and Slip-On Boss flanges: ranges as per nominal pressure categories
    • Standards: IS 6392; ASME B16.5 Class 150 for water uses
    • Acceptance: MTC with buyer lab testing as sole acceptance criterion
    • Delivery scope: Supply of goods only; no installation services

Terms & Conditions

  • Quantity may be increased by up to 25% during contract; delivery adjusts proportionally

  • Bid documents must include PAN, GST, canceled cheque, EFT mandate; MTC required with supply

  • Materials guaranteed for 12 months post-commissioning or 18 months from supply

Important Clauses

Payment Terms

Not explicitly stated; bidders should seek clarity on advance, milestone, and final payment terms as per contract ATC

Delivery Schedule

Delivery extension rules apply; minimum 30 days for any added time; extensions within original delivery period permitted

Penalties/Liquidated Damages

Not specified; ensure to confirm LD clauses and performance bonds during bid submission

Bidder Eligibility

  • Proven experience supplying carbon steel flanges or similar pipe fittings

  • GST Registration and valid PAN; compliance with BIS/IS standards where applicable

  • Financial capability to fulfill supply of approximately ₹2,00,000 value and potential quantity adjustments

Documents 4

GeM-Bidding-8930789.pdf

Main Document

CATALOG-Specification-1

CATALOG Specification

CATALOG-Specification-2

CATALOG Specification

GEM General Terms and Conditions Document

GEM_GENERAL_TERMS_AND_CONDITIONS

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Technical Specifications 2 Items

Item #1 Details

View Catalog
Category Specification Requirement
ITEM Type of Flanges Plate
ITEM Uses Water
ITEM Class 0.1
DEGIGN Design of flanges Integral, Welding Neck, Plate, Screwed Boss, Slip-on Boss, Loose flanges for welded-on lapped pipe ends, Blank
MATERIALS Material of Forgings Carbon steel, Carbon molybdenum steel, 1 percent chromium-0.5 percent molybdenum steel, 2.25 percent chromium-1 percent molybdenum steel, NA
MATERIALS Material of Casting Carbon steel, Carbon molybdenum steel, 2.25 percent chromium-0.5 percent molybdenum steel, 2.25 percent chromium-1 percent molybdenum steel, NA
MATERIALS Material of Rolled Plates Carbon steel, Carbon molybdenum steel, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 0 point 25 N/mm2) 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 0 point 60 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 1 N/mm2) 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 1point 6 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 160, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 2 point 5 N/mm2) 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 4point 0 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 6point4 N/mm2) 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 10 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, NA
DIMENSION Nominal Size of welding neck flanges(Nominal pressure 16 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 0point60 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 1 N/mm2) 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, NA, 25, 50, 80, 100, 150
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 1point6 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 2point5 N/mm2) 175, 200, 250, 300, 350, 400, 500, 600, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 4point0 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 6point4 N/mm2) 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 10 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate flanges for welding(Nominal pressure 16point0 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, NA
DIMENSION Nominal Size of Plate blank flanges(Nominal pressure 0point60 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate blank flanges(Nominal pressure 1 N/mm2) 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate blank flanges(Nominal pressure 1point6 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate blank flanges(Nominal pressure 2point5 N/mm2) 175, 200, 250, 300, 350, 400, 500, NA
DIMENSION Nominal Size of Plate blank flanges(Nominal pressure 4point0 N/mm2) 80
DIMENSION Nominal Size of Screwed boss flanges(Nominal pressure 0point60 N/mm2) 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, NA
DIMENSION Nominal Size of Screwed boss flanges(Nominal pressure 1 and 1point6 N/mm2) 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, NA
DIMENSION Nominal Size of Screwed boss flanges(Nominal pressure 2point5 and 4 N/mm2) 6, 8, 10, 15, 20, 35, 32, 40, 50, 65, 80, 100, 125, 150, NA
DIMENSION Nominal Size of Screwed boss flanges(Nominal pressure 6 point 4 N/mm2) 50, 65, 80, 100, 125, 150, NA
DIMENSION Nominal Size of Screwed boss flanges(Nominal pressure 10 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, NA
DIMENSION Nominal Size of Slip-On Boss Flanges for Welding(Nominal pressure 0point60 N/mm2) 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 3000, NA
DIMENSION Nominal Size of Slip-On Boss Flanges for Welding(Nominal pressure 1 N/mm2) 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Slip-On Boss Flanges for Welding(Nominal pressure 1 point 6 N/mm2) 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Slip-On Boss Flanges for Welding(Nominal pressure 2point5 N/mm2) 6, 8, 10, 15, 20, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Slip-On Boss Flanges for Welding(Nominal pressure 4point0 N/mm2) 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Loose flanges for welded on lapped pipe ends(Nominal pressure 0 point 60 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, NA
DIMENSION Nominal Size of Loose flanges for welded on lapped pipe ends(Nominal pressure 1 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 1 point 6 N/mm2) 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, 2200, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 2 point 5 N/mm2) 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, 1800, 2000, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 4point 0 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 6point4 N/mm2) 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000, 1200, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 10 N/mm2) 125, 150, 175, 200, 250, 300, 350, 400, 500, 600, 700, NA
DIMENSION Nominal Size of Integral Flanges(Nominal pressure 16 point0 N/mm2) 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 175, 200, 250, 300, NA

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Required Documents

1

GST certificate

2

PAN card

3

Experience certificates

4

Financial statements

5

EMD/Security deposit (as applicable by bid)

6

Technical bid documents

7

OEM authorizations (if applicable)

8

Material Test Certificate (MTC)

Frequently Asked Questions

Key insights about BIHAR tender market

How to bid NTPC Nalanda flange tender with IS 6392 compliance

Bidders must submit GSTIN, PAN, canceled cheque, EFT mandate, and Material Test Certificate with the bid; ensure IS 6392 compatibility and ASME B16.5 Class 150 for water uses; delivery scope is goods only, with 12–18 month warranty window.

What are the essential documents for flange supply bid in Bihar

Required documents include GST certificate, PAN, financial statements, experience certificates, MTC, OEM authorizations if applicable, and bid-specific certificates as per ATC; ensure submission of all documents to avoid rejection.

What standards govern IS 6392 flange procurement in this tender

Flanges must meet IS 6392 requirements; ASME B16.5 Class 150 is referenced for water applications; MTC accompanies each delivery; buyer lab testing determines acceptance.

When is delivery time extension allowed for quantity increase

Delivery extension follows (increased quantity ÷ original quantity) × original delivery period, with a minimum of 30 days; extension can occur within the original delivery window as per option clause.

What are the quantity adjustment provisions for this NTPC tender

The purchaser may increase or decrease quantity up to 25% at contract placement and during currency, with adjusted delivery times per ATC terms; bidders must plan supply accordingly.

What is the acceptance testing for flange materials

Material Test Certificate must accompany supply; the buyer lab conducts the tests, and laboratory results determine acceptance, not external certification alone.

Which location is targeted for this flange procurement

The tender targets Nalanda district, Bihar 801301; suppliers should align logistics and delivery schedules to this location for flange types and sizes listed.

What is the scope of supply for this flange bid

Scope is strictly supply of goods (flanges) with IS 6392 compliance; installation or commissioning is not included unless stated in separate contractual amendments.