Why Procurement Buyers Choose Ganpat Industrial As Their Carbon Steel Flanges?
Forged, Not Fabricated
Every flange forged in-house from ASTM A105 killed steel billet
Class 150 To 2500, One PO
Weld neck • Slip-on • Blind • Socket weld • Threaded • Lap joint
ISO & PED Backed
ISO 9001 • ISO 14001 • PED Certified • Petrofac Approved
MTC 3.1 On Every Heat
PMI, dimensional & hydrotest reports before dispatch
Quote In 24 Hours
Ready stock on standard sizes – same-week dispatch from Mumbai
Carbon Steel Flanges Facet
- 1Type: Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Reducing, Puddle
- 2Size Range: NPS ½” to 24″ per ASME B16.5 • NPS 26″ & above per ASME B16.47 / MSS SP-44
- 3Pressure Class: Class 150, 300, 400, 600, 900, 1500 & 2500
- 4Grade: ASTM A105 / ASME SA105 Killed Carbon Steel Forgings
- 5Standards: ASME B16.5, ASME B16.47, MSS SP-44, SAE J518
- 6Finish: Black Paint, Hot-Dip Galvanized, Epoxy Coated, Shot Blasted
Or call our Mumbai office: +91 22 6743 7134 • Fast dispatch on ready stock sizes
Ganpat Industrial stocks Class 150 to 2500 ranges in-house. We use ASTM A105 killed carbon steel with controlled forging chemistry. Our flanges are hot forged and normalized for reliable performance. They are forged, rather than cast or cut from plate. We ship tested, mill-certified flanges to refineries, EPCs and fabricators. Our flanges serve customers across India, UAE and Middle East.
Mumbai · Carbon Steel Flanges Manufacturer in India
Industrial Strength, Precision Forged.
Ganpat Industrial supplies ASTM A105 Carbon Steel Flanges in multiple types. Serving oil & gas, petrochemical and power industries across India and Middle East.
- ✓Multiple Pressure Classes
- ✓EN 10204 3.1 MTC
- ✓Material Traceability
- ✓Global Export Supply
Explore ASTM A105 Carbon Steel Blind Flanges Manufacturer in India Known For Superior Strength & Cost-Effective Piping Solutions
Carbon Steel Flanges Specification
Check Carbon Steel Flanges Supplier in India offering reliable specification details.
Black Steel Lap Joint Flange Material
- ASTM A105 / ASME SA105
- Fully Killed Carbon Steel
- Forged Bar & Billet Origin
- Heat-Number Traceable
Carbon Steel Flange Size Range
- NPS ½” – 24″ (ASME B16.5)
- NPS 26″ & Up (ASME B16.47)
- Class 150 – 2500
- Custom Sizes On Drawing
ANSI B16.5 CS Weld Neck Flanges Testing
- PMI Testing
- Hydrostatic Test
- Dimensional Check
- Third-Party Inspection
High Carbon Steel Weld Neck Flange Finish
- Black Bituminous Paint
- Hot-Dip Galvanized
- Epoxy Coated
- Shot Blasted Natural
SAE J518 CS Blind Flange Documentation
- Mill Test Certificate 3.1
- NABL Lab Report
- Packing List
- Certificate Of Origin
Killed Carbon Steel Slip On Flange Origin
- Indian Origin
- Japanese Origin
- European Origin
- Dual ASTM / ASME Certified
Size Chart of ASME B16.5 Carbon Steel Flange
Find flange dimensions across standard sizes and pressure classes.
| NPS (in) | Flange OD (mm) | Bolt Circle (mm) | No. Of Bolts | Bolt Dia (mm) |
|---|---|---|---|---|
| ½ | 88.9 | 60.3 | 4 | 12.7 |
| ¾ | 98.4 | 69.9 | 4 | 12.7 |
| 1 | 108.0 | 79.4 | 4 | 12.7 |
| 1½ | 127.0 | 98.4 | 4 | 12.7 |
| 2 | 152.4 | 120.7 | 4 | 15.9 |
| 3 | 190.5 | 152.4 | 4 | 15.9 |
| 4 | 228.6 | 190.5 | 8 | 15.9 |
| 6 | 279.4 | 241.3 | 8 | 19.1 |
| 8 | 342.9 | 298.5 | 8 | 19.1 |
| 10 | 406.4 | 362.0 | 12 | 22.2 |
| 12 | 482.6 | 431.8 | 12 | 22.2 |
| 14 | 533.4 | 476.3 | 12 | 25.4 |
| 16 | 596.9 | 539.8 | 16 | 25.4 |
| 18 | 635.0 | 577.9 | 16 | 28.6 |
| 20 | 698.5 | 635.0 | 20 | 28.6 |
| 24 | 812.8 | 749.3 | 20 | 31.8 |
Production Process of Low Temp CS Lap Joint Flange
Billet Cutting & Heating
ASTM A105 billet cut to weight, induction heated to forging temperature
Hot Forging
Press-forged to rough flange shape on a hydraulic forging press
Normalizing
Heat treated to refine grain structure per ASTM A105 clause requirements
Rough & Finish Machining
Bore, hub, face and bolt holes machined to ASME B16.5 tolerance
Facing & Serration
Raised face turned and serrated for correct gasket seating
Inspection, Marking & Packing
PMI & dimensional check, heat-stamped, then export-ready packing
Surface Coatings For Black Steel Forged Flange
Coating is chosen to match the exposure, buried line, coastal air or indoor process piping
Black Bituminous Paint
Hot-Dip Galvanizing
Epoxy Coating
Zinc-Rich Primer
Rust-Preventive Oil Coat
Shot-Blasted Natural Finish
Looking for Mill-Certified Low Carbon Steel Blind Flange?Share size, class & quantity – Get factory price with MTC 3.1 in 24 hours.
Distinct Types of CS Flanges
ANSI B16.5 CS Weld Neck Flange
ASME B16.5
Low Carbon Steel Socket Weld Flange
Custom Grade
Carbon Steel Threaded Flange
Custom Drawing
Black Steel Lap Joint Flange
ASME B16.5
CS Puddle Flange
Custom Drawing
SAE J518 CS Blind Flange
SAE J518
Killed Carbon Steel Slip On Flange
Fully Killed
Carbon Steel Reducing Flange
Custom Grade
Chemical Composition of ASTM A105 Carbon Steel Blind Flange
ManganeseMn
0.60–1.05%
SiliconSi
0.10–0.35%
CarbonC
≤ 0.35%
SulfurS
≤ 0.040%
PhosphorusP
≤ 0.035%
IronFe
Balance
Mechanical Properties of High Carbon Steel Weld Neck Flange
Tensile Strength
485 MPa Min
70,000 psi • ASTM A105
Yield Strength
250 MPa Min
36,000 psi • 0.2% Offset
Hardness
137–197 HBW
Brinell, Per Heat
Elongation
22% Min
In 2 in. Gauge
Material Equivalent of ANSI B16.5 CS Weld Neck Flanges
American Standard
- ASTM A105
- ASME SA-105
- ASME B16.5 / B16.47
European Standard
- EN 10222-2 P245GH / P250GH
- DIN 1.0460
- EN 1092-1
British Standard
- BS 1503-161-430A
- BS EN 10222-2
- Legacy BS 4504
Sourcing Large Diameter Carbon Steel Flanges?Send your BOQ – factory price, MTC 3.1, dispatch same week.
How To Choose The Right Carbon Steel Flange?
Six checks before you finalize your next flange order.
Match The Pressure Class
Check Service Temperature
Confirm Facing & Bore
Verify Size Range
Match Flange Type To Joint
Confirm Coating & Corrosion Allowance
Monthly Delivery of Low Temp CS Lap Joint Flange to Below Countries
| Export to | Countries | Continent | Shipping Time |
|---|---|---|---|
|
UAE | Asia | 11-50 Days |
|
USA | North America | 30-45 Days |
|
Italy | Europe | 20-54 Days |
Welding Considerations For CS Slip On Flange
Preheat Before Welding
Preheat per thickness to guard against hydrogen cracking on thick hubs
Select Matching Filler
ER70S-6 / E7018 filler for carbon steel weld neck bevels
Control Interpass Temperature
Hold interpass temperature within the qualified WPS range
Root, Fill & Cap Passes
Multi-pass butt weld to the pipe per ASME B31.3
Post Weld Heat Treatment
Stress relieve thick-wall joints per applicable piping code
Inspect The Weld
Visual, DP and/or RT/UT verification before hydrotest
Export Packaging For SAE J518 CS Blind Flange
Individual Poly Wrap & Bore Plug
Protects the raised face and bore from transit damage
Wooden Crate / Pallet
Export-grade crating for FCL and LCL shipments
Heat-Number Tagging
Every flange tagged and traceable to its mill certificate
VCI Moisture-Barrier Wrap
Rust-preventive coating and VCI wrap for long sea transit
Pressure Rating of Carbon Steel Reducing Flange
| Temperature (°C) | Working Pressure (bar) | ||||||
|---|---|---|---|---|---|---|---|
| Class | |||||||
| 150 | 300 | 400 | 600 | 900 | 1500 | 2500 | |
| -29 – 38 | 19.6 | 51.1 | 68.1 | 102.1 | 153.2 | 255.3 | 425.5 |
| 100 | 17.7 | 46.6 | 62.1 | 93.2 | 139.8 | 233.0 | 388.3 |
| 375 | 7.4 | 36.4 | 48.5 | 72.7 | 109.1 | 181.8 | 303.1 |
| 200 | 13.8 | 43.8 | 58.4 | 87.6 | 131.4 | 219.0 | 365.0 |
| 538 | 1.4 | 5.9 | 7.9 | 11.8 | 17.7 | 29.5 | 49.2 |
| 250 | 12.1 | 41.9 | 55.9 | 83.9 | 125.8 | 209.7 | 349.5 |
| 300 | 10.2 | 39.8 | 53.1 | 79.6 | 119.5 | 199.1 | 331.8 |
| 325 | 9.3 | 38.7 | 51.6 | 77.4 | 116.1 | 193.6 | 322.6 |
| 350 | 8.4 | 37.6 | 50.1 | 75.1 | 112.7 | 187.8 | 313.0 |
| 50 | 19.2 | 50.1 | 66.8 | 100.2 | 150.4 | 250.6 | 417.7 |
| 400 | 6.5 | 34.7 | 46.3 | 69.4 | 104.2 | 173.6 | 289.3 |
| 150 | 15.8 | 45.1 | 60.1 | 90.2 | 135.2 | 225.4 | 375.6 |
| 425 | 5.5 | 28.8 | 38.4 | 57.5 | 86.3 | 143.8 | 239.7 |
| 450 | 4.6 | 23.0 | 30.7 | 46.0 | 69.0 | 115.0 | 191.7 |
| 475 | 3.7 | 17.4 | 23.2 | 34.9 | 52.3 | 87.2 | 145.3 |
| 500 | 2.8 | 11.8 | 15.7 | 23.5 | 35.3 | 58.8 | 97.9 |
Testing Methods of ASTM A105 Carbon Steel Blind Flange
Find Carbon Steel Flanges Supplier in India providing numerous testing methods.
PMI Testing
Positive Material Identification on every heat
Hydrostatic Test
Pressure tested to 1.5× design pressure per ASME B16.5
Ultrasonic Testing (UT)
Internal forging soundness verified before machining
Dye Penetrant Test (DPT)
Surface crack detection on machined faces
Dimensional Inspection
OD, bore, thickness & bolt circle checked per lot
Radiography Test (RT)
On request for critical welded assemblies
Need A Full MTC 3.1 Test Package With Your Order?Ask for PMI, hydrotest & dimensional reports with every shipment.
Buy ANSI B16.5 CS Weld Neck Flanges As Per ASME B16.5 & MSS SP-44 Standards For Oil, Gas & Petrochemical Industries
Applications of CS Puddle Flange
Built to perform across oil, gas and industrial piping projects nationwide.
Oil & Gas Pipelines
Petrochemical & Refinery Plants
Power Generation Plants
Water & Wastewater Treatment
Fertilizer & Chemical Plants
Structural Fabrication
Shipbuilding & Marine Piping
EPC & Industrial Piping Projects
Weekly Delivery of Carbon Steel Threaded Flange to Below Countries
| Export to | Continent | Port | Shipping time |
|---|---|---|---|
Germany
|
Europe | Port of Rotterdam | 20-45 Days |
Malaysia
|
Asia | Port of Shanghai | 19-23 Days |
Spain
|
Europe | Port of Hamburg | 33-34 Days |
Frequently Asked Questions
What is the price of High Carbon Steel Weld Neck Flange in India?
Prices depend on size, class, type, coating and testing requirements.
What is the HS code for Carbon Steel Flanges?
The HSN code is 7307.91 for carbon steel flanges.
What sizes of Low Carbon Steel Blind Flange do you supply?
We supply NPS ½" to 24", with larger sizes available on request.
Do you supply Black Steel Lap Joint Flange?
Yes, Carbon Steel Lap Joint Flanges are available on request.
What documentation comes with CS Puddle Flange shipments?
MTC 3.1 and packing documents are supplied as standard.
Sales Agents In Following Locations
| Regions | Country |
|---|---|
| South Carolina | USA |
| East Asia | China, Japan, South Korea |
| North America | USA, Canada, Mexico |
| North Africa | Egypt, Morocco, Algeria |
| South America | Brazil, Argentina, Colombia |
| West Africa | Nigeria, Ghana, Senegal |
| East Africa | Kenya, Ethiopia, Tanzania |
| South Asia | India, Pakistan, Bangladesh |
| Melanesia | Fiji, Papua New Guinea |
| Middle East | Saudi Arabia, Iran, Iraq |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA