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Flange Price List India 2026: SS304, SS316 & Carbon Steel Rate Chart by Size & Class
Krishna Industries (KELOR), Ahmedabad — Verified supplier of forged flanges in ASTM A182 F304/F316 (stainless steel) and ASTM A105 (carbon steel). Pan India dispatch with GST invoice under HSN 7307. Bulk pricing available for project quantities — send your requirement list for same-day quotation.
This price guide covers June 2026 indicative rates for slip-on, weld neck, blind, socket weld, and threaded flanges in Class 150, Class 300, and Class 600 — organized by material, size, and flange type. Prices are indicative Ex-Works Mumbai/Ahmedabad; actual quotes may vary based on quantity, certification requirements, and supplier.
Quick Reference — June 2026 Rates
SS304 Per KgRs. 250 – 500
SS316 Per KgRs. 320 – 620
CS A105 Per KgRs. 90 – 180
MS Flange Per KgRs. 55 – 85
HSN 7307
GST 18%
ASME B16.5
Ex-Works India
Bulk Discount Available
1. SS304 Flange Price List (ASTM A182 F304) — Class 150
Stainless Steel 304 (ASTM A182 F304) is the most widely specified flange grade for Indian industrial piping, offering excellent corrosion resistance for water, chemicals, and atmospheric exposure at a moderate cost premium over carbon steel. The following table shows indicative per-piece rates for the most common flange types in Class 150 (ASME B16.5), the standard pressure class used in approximately 70-80% of all flanged piping connections in India. Prices are based on June 2026 market rates from multiple Indian suppliers and are subject to change based on raw material (nickel, chromium) price movements on the London Metal Exchange and domestic demand-supply dynamics.
| Size (NB) | DN (mm) | Slip-On (SORF) | Weld Neck (WNRF) | Blind (BLRF) | Socket Weld (SWRF) |
|---|---|---|---|---|---|
| 1/2″ | 15 | Rs. 310 – 350 | Rs. 420 – 480 | Rs. 280 – 320 | Rs. 380 – 430 |
| 3/4″ | 20 | Rs. 435 – 475 | Rs. 560 – 620 | Rs. 380 – 420 | Rs. 480 – 540 |
| 1″ | 25 | Rs. 530 – 585 | Rs. 690 – 760 | Rs. 460 – 510 | Rs. 580 – 640 |
| 1.25″ | 32 | Rs. 680 – 750 | Rs. 880 – 970 | Rs. 580 – 640 | Rs. 730 – 810 |
| 1.5″ | 40 | Rs. 820 – 920 | Rs. 1,050 – 1,180 | Rs. 700 – 780 | Rs. 880 – 980 |
| 2″ | 50 | Rs. 1,100 – 1,220 | Rs. 1,400 – 1,560 | Rs. 920 – 1,020 | Rs. 1,180 – 1,300 |
| 2.5″ | 65 | Rs. 1,650 – 1,850 | Rs. 2,100 – 2,350 | Rs. 1,380 – 1,530 | Rs. 1,770 – 1,960 |
| 3″ | 80 | Rs. 2,100 – 2,400 | Rs. 2,700 – 3,000 | Rs. 1,750 – 1,950 | Rs. 2,250 – 2,500 |
| 4″ | 100 | Rs. 3,100 – 3,500 | Rs. 4,000 – 4,500 | Rs. 2,500 – 2,800 | Rs. 3,300 – 3,700 |
| 6″ | 150 | Rs. 4,900 – 5,500 | Rs. 6,300 – 7,000 | Rs. 3,800 – 4,200 | Rs. — |
| 8″ | 200 | Rs. 7,500 – 8,500 | Rs. 9,500 – 10,800 | Rs. 5,500 – 6,200 | Rs. — |
| 10″ | 250 | Rs. 11,000 – 12,500 | Rs. 14,000 – 15,800 | Rs. 8,000 – 9,000 | Rs. — |
| 12″ | 300 | Rs. 14,500 – 16,000 | Rs. 18,500 – 20,500 | Rs. 10,500 – 11,800 | Rs. — |
Note: Socket weld flanges (SWRF) are typically available only in sizes 1/2″ through 4″ as per ASME B16.5. For sizes 6″ and above, slip-on or weld neck configurations are standard. All prices are indicative, Ex-Works, exclusive of 18% GST.
2. SS316 Flange Price List (ASTM A182 F316) — Class 150
Stainless Steel 316 (ASTM A182 F316) provides superior corrosion resistance compared to SS304 due to its 2-3% molybdenum addition, making it the standard choice for marine environments, chemical processing, pharmaceutical, and food-grade piping systems in India. The molybdenum content significantly improves resistance to pitting corrosion from chlorides, which is critical in coastal Indian installations and desalination plants. SS316 flanges carry a 15-25% price premium over equivalent SS304 flanges, driven by the higher cost of molybdenum alloying element and slightly increased nickel content.
| Size (NB) | DN (mm) | Slip-On (SORF) | Weld Neck (WNRF) | Blind (BLRF) |
|---|---|---|---|---|
| 1/2″ | 15 | Rs. 380 – 420 | Rs. 510 – 570 | Rs. 340 – 380 |
| 3/4″ | 20 | Rs. 520 – 580 | Rs. 690 – 760 | Rs. 460 – 510 |
| 1″ | 25 | Rs. 650 – 720 | Rs. 850 – 940 | Rs. 560 – 620 |
| 1.5″ | 40 | Rs. 1,000 – 1,120 | Rs. 1,300 – 1,450 | Rs. 850 – 950 |
| 2″ | 50 | Rs. 1,350 – 1,500 | Rs. 1,750 – 1,950 | Rs. 1,130 – 1,250 |
| 3″ | 80 | Rs. 2,550 – 2,900 | Rs. 3,300 – 3,700 | Rs. 2,100 – 2,350 |
| 4″ | 100 | Rs. 3,800 – 4,200 | Rs. 4,900 – 5,500 | Rs. 3,000 – 3,400 |
| 6″ | 150 | Rs. 5,800 – 6,500 | Rs. 7,500 – 8,400 | Rs. 4,500 – 5,100 |
| 8″ | 200 | Rs. 9,000 – 10,000 | Rs. 11,500 – 12,800 | Rs. 6,800 – 7,500 |
| 10″ | 250 | Rs. 13,000 – 14,500 | Rs. 16,500 – 18,500 | Rs. 9,500 – 10,500 |
| 12″ | 300 | Rs. 17,500 – 19,500 | Rs. 22,000 – 24,500 | Rs. 12,500 – 14,000 |
3. Carbon Steel Flange Price List (ASTM A105) — Class 150
Carbon steel flanges to ASTM A105 specification are the workhorse of Indian industrial piping, offering the most economical connection solution for non-corrosive and ambient-temperature applications including water supply, steam, compressed air, oil and gas, and general process piping. A105 flanges cost approximately 3-5 times less per kilogram than SS304 flanges, making them the default choice where corrosion resistance is not a primary requirement. The following rates apply to forged carbon steel flanges with standard raised face (RF) finish, suitable for use with ASME B16.5 Class 150 flanged joints.
| Size (NB) | DN (mm) | Slip-On (SORF) | Weld Neck (WNRF) | Blind (BLRF) | Socket Weld (SWRF) |
|---|---|---|---|---|---|
| 1/2″ | 15 | Rs. 120 – 140 | Rs. 160 – 185 | Rs. 110 – 125 | Rs. 140 – 160 |
| 3/4″ | 20 | Rs. 155 – 175 | Rs. 210 – 240 | Rs. 140 – 160 | Rs. 185 – 210 |
| 1″ | 25 | Rs. 195 – 220 | Rs. 270 – 310 | Rs. 175 – 200 | Rs. 240 – 270 |
| 1.5″ | 40 | Rs. 310 – 350 | Rs. 420 – 470 | Rs. 270 – 310 | Rs. 370 – 420 |
| 2″ | 50 | Rs. 420 – 470 | Rs. 560 – 630 | Rs. 360 – 410 | Rs. 490 – 550 |
| 3″ | 80 | Rs. 650 – 750 | Rs. 870 – 990 | Rs. 550 – 630 | Rs. 770 – 870 |
| 4″ | 100 | Rs. 900 – 1,050 | Rs. 1,200 – 1,380 | Rs. 760 – 880 | Rs. 1,060 – 1,200 |
| 6″ | 150 | Rs. 1,500 – 1,800 | Rs. 2,000 – 2,400 | Rs. 1,200 – 1,400 | Rs. — |
| 8″ | 200 | Rs. 2,400 – 2,800 | Rs. 3,200 – 3,700 | Rs. 1,850 – 2,150 | Rs. — |
| 10″ | 250 | Rs. 3,500 – 4,000 | Rs. 4,600 – 5,300 | Rs. 2,700 – 3,100 | Rs. — |
| 12″ | 300 | Rs. 5,000 – 5,800 | Rs. 6,500 – 7,500 | Rs. 3,800 – 4,400 | Rs. — |
4. Class 300 Price Premium over Class 150
ASME B16.5 Class 300 flanges are rated for approximately 2.5 times the pressure of Class 150 flanges at ambient temperature (740 psi vs 285 psi for carbon steel). The higher pressure rating requires a thicker cross-section, greater bolt circle diameter, and heavier flange body — all of which increase material consumption, forging time, and machining cost. The following table shows the typical Class 300 premium as a percentage over Class 150 prices for the same size, material, and flange type. This premium varies somewhat by size, with larger sizes generally showing a slightly lower percentage premium because the absolute material cost increase is proportionally less significant.
| Size | CS A105 Premium | SS304 Premium | SS316 Premium | Typical Weight Increase |
|---|---|---|---|---|
| 1/2″ – 1″ | +35-45% | +35-45% | +35-45% | +40-50% |
| 1.5″ – 3″ | +30-40% | +30-40% | +30-40% | +35-45% |
| 4″ – 6″ | +30-35% | +30-35% | +30-35% | +35-40% |
| 8″ – 12″ | +25-35% | +25-35% | +25-35% | +30-40% |
How to Use the Class 300 Multiplier
To estimate a Class 300 flange price, multiply the Class 150 price from the tables above by the applicable premium factor. For example, a 4″ SS304 SORF Class 150 costs approximately Rs. 3,100-3,500. With a Class 300 premium of +35%, the estimated Class 300 price is: Rs. 3,300 x 1.35 = Rs. 4,455 (use the midpoint). This is an approximation — actual Class 300 pricing depends on specific supplier inventory and current raw material costs. For accurate quotes on Class 300 or Class 600 flanges, send your size and quantity list via email or WhatsApp.
5. Bulk Order Discount Schedule
Bulk flange procurement in India follows a tiered discount structure based on order volume and total value. Indian suppliers and stockists typically offer progressive discounts as order quantities increase, reflecting the reduced per-unit overhead for procurement, handling, and logistics. The following discount schedule represents standard industry practice for 2026 and applies to orders of a single size, material, class, and flange type. Mixed orders across multiple sizes may qualify for volume-based pricing at the supplier’s discretion, with the total order value being the primary determinant.
| Order Quantity | Discount Range | Typical Application | Payment Terms |
|---|---|---|---|
| 1 – 9 pieces | List price (no discount) | Maintenance replacement, small projects | Standard terms |
| 10 – 49 pieces | 5 – 8% off list | Medium projects, plant maintenance | Standard or advance |
| 50 – 199 pieces | 10 – 15% off list | Large projects, EPC contracts | Advance preferred |
| 200 – 999 pieces | 15 – 20% off list | Mega projects, turnkey plants | Advance + LC |
| 1,000+ pieces | 18 – 25% off list | Annual contracts, ONGC/IOCL tenders | Annual rate contract |
| Project > Rs. 10 Lakh | Negotiable (20-30%) | Government infrastructure, Jal Jeevan | Bank guarantee + LC |
Bulk Buying Strategy for 2026
For project procurements, consolidate your flange requirement across all piping specifications into a single Bill of Materials (BOM) and request a blanket quote from 2-3 verified suppliers. This approach yields the highest aggregate discount (typically 18-22%) because suppliers can optimize raw material procurement and production scheduling. Request separate line-item pricing for each size/type so you can compare rates accurately. Always specify certification requirements (ASTM material test report, third-party inspection if needed) and delivery schedule upfront to avoid post-order cost disputes.
6. Raw Material Cost Breakdown (June 2026)
Understanding the raw material cost component of finished flange prices is essential for evaluating quotes and negotiating with suppliers. Raw material typically accounts for 55-70% of the finished flange price for stainless steel grades and 60-75% for carbon steel, with the balance covering forging, machining, surface finishing, testing, certification, overhead, and margin. The following table shows the current raw material prices that form the base cost of flange production in India, sourced from primary mills and stockists in Mumbai, Ahmedabad, and Ludhiana.
| Material | Price Per Kg (INR) | Primary Cost Drivers | Current Trend |
|---|---|---|---|
| SS 304 Raw Material | Rs. 200 – 230 | Nickel (8-10.5%), Chromium (18-20%) | Stable to slightly declining (-5% YTD) |
| SS 316 Raw Material | Rs. 270 – 320 | Nickel + Molybdenum (2-3%), higher Cr | Slight increase (+3-5% Q2 2026) |
| CS A105 Forging Billet | Rs. 65 – 85 | Carbon (0.25-0.35%), Mn (0.60-1.05%) | Stable |
| MS Plate (IS 2062) | Rs. 48 – 58 | Hot-rolled coil/plate, SAIL/Tata | Stable |
| Nickel (LME) | Rs. 1,650/kg ($16.50/lb) | Global demand, Indonesia supply | Declining (-16% from March 2026 peak) |
| Chromium (LME) | Rs. 110/kg | South African, Chinese supply | Stable |
| Molybdenum | Rs. 580/kg | Specialty alloying element | Rising (Feb 2026 surcharge alert) |
2026 Price Trend Alert: SS Prices Dropped Up to 16% in March 2026
Stainless steel prices in India experienced a significant correction in March 2026, with declines of up to 16% from earlier 2025-2026 highs, driven primarily by a sharp drop in nickel prices on the London Metal Exchange. This correction has brought SS304 raw material prices down to approximately Rs. 200-230/kg from earlier levels of Rs. 240-260/kg. For buyers with upcoming project requirements, the current price environment represents a favorable procurement window, though prices are expected to stabilize or recover modestly in H2 2026 as infrastructure spending accelerates.
7. Flange Type Cost Comparison (Same Size, Class 150, SS304)
The choice of flange type significantly impacts the total piping cost, not only through the flange price itself but also through installation labor, welding cost, and long-term maintenance requirements. The following comparison uses a 4-inch Class 150 SS304 flange as the reference point, showing the relative cost of each flange type. This data helps project engineers and procurement teams optimize their flange selection for cost-effectiveness without compromising safety or reliability.
| Flange Type | Indicative Price (4″ CL150) | Relative Cost | Installation Cost | Best Application |
|---|---|---|---|---|
| Slip-On (SORF) | Rs. 3,100 – 3,500 | 1.0x (baseline) | Low (fillet weld both sides) | General piping, economy |
| Weld Neck (WNRF) | Rs. 4,000 – 4,500 | 1.3x | Moderate (butt weld, bevel prep) | High-pressure, critical service |
| Blind (BLRF) | Rs. 2,500 – 2,800 | 0.8x | N/A (no pipe weld) | Line termination, blanking |
| Socket Weld (SWRF) | Rs. 3,300 – 3,700 | 1.05x | Low (fillet weld) | Small bore, high-pressure |
| Threaded (NPT) | Rs. 3,800 – 4,300 | 1.2x | Lowest (no welding) | Instrument air, small lines |
| Lap Joint (LJF) | Rs. 3,200 – 3,600 | 1.0x + stub end cost | Low | Stainless, frequent dismantling |
| Plate Flange | Rs. 2,800 – 3,200 | 0.9x | Low (fillet weld) | Low-pressure, non-critical |
8. Mild Steel Flange Price List (IS 2062 / MS Table E)
Mild steel (MS) flanges, typically produced from IS 2062 Grade E250 plate material per IS 4503 (Table E), represent the most economical flange option available in the Indian market. These flanges are widely used in water supply, fire fighting, HVAC, and low-pressure utility piping where corrosion resistance is not a primary concern. MS flanges are available from stockists across India at prices significantly below forged carbon steel (ASTM A105) and stainless steel flanges. The following rates are for MS Table E flanges with standard dimensions.
| Size (NB) | Slip-On / Table E | Blind / Table E |
|---|---|---|
| 1/2″ (15NB) | Rs. 29 – 40 | Rs. 25 – 35 |
| 3/4″ (20NB) | Rs. 39 – 52 | Rs. 33 – 45 |
| 1″ (25NB) | Rs. 53 – 68 | Rs. 45 – 58 |
| 1.5″ (40NB) | Rs. 95 – 120 | Rs. 78 – 100 |
| 2″ (50NB) | Rs. 135 – 170 | Rs. 110 – 140 |
| 3″ (80NB) | Rs. 290 – 360 | Rs. 230 – 290 |
| 4″ (100NB) | Rs. 420 – 530 | Rs. 340 – 430 |
| 6″ (150NB) | Rs. 750 – 950 | Rs. 580 – 740 |
| 8″ (200NB) | Rs. 1,350 – 1,700 | Rs. 1,050 – 1,350 |
| 10″ (250NB) | Rs. 2,100 – 2,600 | Rs. 1,600 – 2,000 |
| 12″ (300NB) | Rs. 3,100 – 3,900 | Rs. 2,400 – 3,000 |
9. Applicable Standards and Specifications
| Standard | Scope | Applicable Materials |
|---|---|---|
| ASME B16.5 | Pipe flanges and flanged fittings NPS 1/2″ to 24″, Class 150-2500 | All forged CS, SS, alloy steel |
| ASME B16.47 Series A | Large-diameter flanges NPS 26″ to 60″, Class 150-900 | All forged and cast materials |
| ASTM A105 / A105N | Forged carbon steel piping components | Carbon steel (ambient to elevated temp) |
| ASTM A182 F304/F316 | Forged or rolled SS pipe flanges | SS304, SS316, SS321, SS347 |
| IS 4503 | Steel pipe flanges (Indian standard) | MS Table E, Table D, Table C |
| IS 2062 | Hot-rolled low/medium carbon steel (plate material for MS flanges) | Grade E250, E300, E410 |
| EN 1092-1 | European flange standard (PN 6 to PN 400) | All materials, metric dimensions |
18%GST Rate (HSN 7307)
Rs. 250-620SS Flange Price Per Kg
Rs. 90-180CS Flange Price Per Kg
Up to 25%Bulk Order Discount
Need Flange Quotes for Your Project?
Send your complete size-wise flange requirement list with material grade, pressure class, and quantity for same-day quotation.
✉ Email: [email protected] ☎ WhatsApp Your Requirement10. Frequently Asked Questions
What is the current price of SS304 flanges in India in 2026?
In June 2026, SS304 (ASTM A182 F304) flanges in India range from approximately Rs. 310 per piece for a 1/2 inch Class 150 slip-on flange to Rs. 15,500 per piece for a 12 inch Class 150 weld neck flange. Per kilogram, SS304 flanges cost between Rs. 250 and Rs. 500 depending on size, with smaller sizes having a higher per-kg rate due to forging and machining overhead. Class 300 SS304 flanges carry a 30-40% premium over Class 150 for the same size.
How much more expensive are SS316 flanges compared to SS304?
SS316 (ASTM A182 F316) flanges typically cost 15-25% more than equivalent SS304 flanges of the same size, class, and type. The premium is driven by the molybdenum content (2-3% in SS316 vs trace amounts in SS304) and higher nickel content, both of which increase raw material cost. For example, a 4 inch Class 150 SORF flange costs approximately Rs. 3,100-3,500 in SS304 compared to Rs. 3,800-4,200 in SS316. In March 2026, SS316 prices saw a sharper increase due to rising molybdenum surcharges.
What is the price difference between Class 150 and Class 300 flanges?
Class 300 flanges cost approximately 30-50% more than Class 150 flanges of the same size and material. The premium reflects the thicker cross-section, heavier weight, and more demanding machining tolerances required for the higher pressure rating. For example, a 6 inch SS304 weld neck flange costs approximately Rs. 4,900-5,500 in Class 150 compared to Rs. 7,000-8,000 in Class 300. The weight increase is typically 40-60%, which is the primary cost driver.
How much discount can I get for bulk flange orders in India?
Bulk flange orders in India typically qualify for the following discounts based on order quantity and value: 10-50 pieces of the same size and class: 5-8% discount on the list price; 50-200 pieces: 10-15% discount; 200-1,000 pieces: 15-20% discount; Above 1,000 pieces or project orders exceeding Rs. 10 lakh: 18-25% discount. Additional factors that improve pricing include consolidated material procurement (reducing raw material cost), advance payment terms (2-5% additional discount for 100% advance), and long-term supply agreements with annual volume commitments.
What is the GST rate on flanges in India?
Flanges fall under HSN code 7307 (Tube or pipe fittings of iron or steel) and attract a GST rate of 18% in India. This applies to all types of flanges regardless of material (carbon steel, stainless steel, alloy steel), manufacturing method (forged, cast, plate), or pressure class. Import duties on flanges vary: basic customs duty is typically 7.5-10%, plus social welfare surcharge of 10% on the duty amount. For project imports under specific notifications, concessional duty rates may apply.
Which flange type is the most economical for piping systems?
Slip-on flanges (SORF) are the most economical type for piping systems, typically 20-35% cheaper than weld neck flanges of the same size, class, and material. Blind flanges are moderately priced (a solid disc with no bore), and socket weld flanges (SWRF) are priced similarly to slip-on but are limited to smaller sizes (typically 1/2 inch to 4 inch). Threaded flanges (NPT) are the most expensive per unit for small sizes due to precision thread machining. For budget-sensitive projects, slip-on flanges with standard raised face (RF) finish offer the best combination of low cost, easy installation, and reliable sealing.
What factors affect flange prices in the Indian market?
Flange prices in India are influenced by five primary factors: (1) Raw material cost, which accounts for 55-70% of the finished flange price and is driven by nickel, chromium, and molybdenum prices on the LME; (2) Size and weight, with per-kg rates decreasing for larger sizes due to forging efficiency; (3) Pressure class, where Class 300 costs 30-50% more than Class 150; (4) Manufacturing method, with forged flanges costing more than cast or plate flanges but offering superior mechanical properties; (5) Order volume, where bulk orders of 100+ pieces can secure 10-15% discounts. Additionally, certification requirements (MTC 3.1, third-party inspection), surface finish (RF vs FF), and special testing (PMI, hydrostatic) add 3-8% to the base cost.
What is the price of carbon steel A105 flanges per kg in India?
ASTM A105 carbon steel flanges in India currently range from Rs. 90 to Rs. 180 per kilogram, depending on size and pressure class. Per piece, A105 flanges range from Rs. 120 for a 1/2 inch Class 150 slip-on flange to approximately Rs. 5,500-6,000 for a 12 inch Class 150 weld neck flange. Carbon steel flanges are significantly more affordable than stainless steel, typically costing 3-5 times less per kilogram than SS304 and 4-6 times less than SS316, making them the standard choice for non-corrosive and ambient-temperature piping applications.