Kalpataru Piping Solutions is a leading carbon steel valve manufacturer and exporter headquartered in Mumbai, India. We supply a comprehensive range of carbon steel valves engineered to withstand the demanding pressure, temperature, and corrosion conditions of oil & gas, refinery, power generation, petrochemical, and water treatment industries worldwide.
Our carbon steel gate valves, globe valves, check valves, ball valves, butterfly valves, and needle valves are manufactured from premium carbon steel alloys — ASTM A216 WCB, ASTM A105, ASTM A182 F11/F22/F5/F91, and ASTM A352 LCB/LCC — and tested in full compliance with API 598, API 600, API 602, and ASME B16.34. Every valve ships with an EN 10204 Type 3.1 or 3.2 mill test report (MTR) and a comprehensive third-party inspection dossier.
With over two decades of piping solutions expertise, Kalpataru has exported valves to more than 50 countries including the UAE, Saudi Arabia, the USA, Germany, Singapore, and Australia. Our in-house machining, NDE, and hydrostatic test facilities ensure every carbon steel valve meets the tightest dimensional and metallurgical tolerances before shipment.
- What Is a Duplex Steel Ball Valve?
- Duplex Grade Classification
- Duplex Steel Ball Valve Specifications
- Types of Duplex Steel Ball Valves
- Duplex Steel Ball Valve Dimensions & Weight Chart
- Chemical Composition of Duplex Steel Ball Valve
- Mechanical Properties of Duplex Steel Ball Valve
- Applications of Duplex Steel Ball Valves
- Quality Standards & Certifications
- Related Products from Kalpataru Piping Solution
- Frequently Asked Questions — Duplex Steel Ball Valve
Technical Data
Carbon Steel Valve Types
Kalpataru manufactures the full spectrum of industrial valves in carbon steel, covering every flow-control function from on/off isolation to throttling, non-return, and multi-turn regulation.
Valve Type | Standard / Design Code | Size Range (NPS) | Pressure Class | End Connections | Typical Application |
|---|---|---|---|---|---|
Carbon Steel Gate Valve (Cast) | API 600 / ASME B16.34 | ½–36 | 150–2500 | RF, RTJ, BW | Oil & gas isolation |
Carbon Steel Gate Valve (Forged — API 602) | API 602 / ASME B16.34 | ½–2 | 800–2500 | SW, NPT, BW | High-pressure forged lines |
Carbon Steel Globe Valve (Cast) | BS 1873 / ASME B16.34 | ½–36 | 150–2500 | RF, RTJ, BW | Throttling, flow regulation |
Carbon Steel Globe Valve (Forged) | API 602 / BS 5352 | ½–2 | 800–2500 | SW, NPT, BW | Instrument & utility service |
Carbon Steel Check Valve (Swing) | API 6D / ASME B16.34 | ½–36 | 150–2500 | RF, RTJ, BW | Non-return, pipeline |
Carbon Steel Ball Valve | API 6D / ASME B16.34 | ½–36 | 150–2500 | RF, RTJ, BW | Tight shutoff, fast operation |
Carbon Steel A105 Ball Valve (Instrumentation) | ASME B16.34 | ¼–2 | 1500–2500 | SW, NPT | Instrument/sample lines |
API 6D / TAPPI TIS 405-8 | 2–48 | 150 | Wafer/Lugged | Slurry, pulp & paper | |
ASME B16.34 | ¼–2 | 800–2500 | NPT, SW | Fine-flow metering | |
Carbon Steel Butterfly Valve | API 609 / ASME B16.34 | 2–48 | 150–300 | Wafer, Lug, ANSI Flange | Large-diameter shutoff |
Carbon Steel Plug Valve | API 599 / ASME B16.34 | ½–24 | 150–2500 | RF, RTJ, BW | Multi-port routing |
Carbon Steel Y-Strainer | ASME B16.34 | ½–16 | 150–2500 | RF, SW, NPT | Pipeline debris protection |
Carbon Steel Manifold Valve | ASME B16.34 | ¼–1 | 1500–6000 psi | NPT, SW | Instrument manifolds |
All types are available in actuated versions (pneumatic, electric, or hydraulic) on request. Contact our team for bespoke sizing, trim, or end-connection requirements.
Carbon Steel Valve Material Grades
Selecting the correct carbon steel alloy for a valve is critical to service life, pressure containment, and regulatory compliance. Kalpataru stocks and fabricates valves across the full ASTM/ASME carbon steel family.
Cast Carbon Steel Grades
ASTM Grade | UNS | Type | Min. Tensile (MPa) | Min. Yield (MPa) | Elongation | Service Temp. | Typical Use |
|---|---|---|---|---|---|---|---|
A216 Gr. WCB | J03002 | Carbon steel cast | 485 | 250 | 22% | −29°C to +425°C | General-purpose valves, Class 150–2500 |
A216 Gr. WCC | J02503 | Carbon steel cast | 485 | 275 | 22% | −29°C to +425°C | Higher yield WCB replacement |
A216 Gr. WC1 | J12524 | C-½Mo cast | 485 | 275 | 22% | up to +510°C | Elevated-temp steam service |
A217 Gr. WC6 | J12062 | 1¼ Cr-½Mo cast | 485 | 275 | 20% | up to +565°C | Refinery, high-temp steam |
A217 Gr. WC9 | J21890 | 2¼ Cr-1Mo cast | 585 | 380 | 20% | up to +595°C | Heavy-wall high-temp service |
A352 Gr. LCB | J03003 | Low-temp C steel | 450 | 240 | 24% | −46°C to +345°C | Cryogenic & low-temp pipelines |
A352 Gr. LCC | J02505 | Low-temp C steel | 485 | 275 | 22% | −46°C to +345°C | Low-temp replacement for WCB |
Forged Carbon Steel Grades
ASTM Grade | UNS | Form | Min. Tensile (MPa) | Min. Yield (MPa) | Elongation | Service Temp. | Typical Use |
|---|---|---|---|---|---|---|---|
A105 | K03504 | Forged C steel | 485 | 250 | 22% | −29°C to +425°C | Socket weld / threaded valves |
A105N | K03504 | Normalised forging | 485 | 250 | 22% | −29°C to +425°C | NACE sour-service valves |
A182 Gr. F1 | K02501 | C-½Mo forging | 485 | 275 | 20% | up to +510°C | High-temp forged valves |
A182 Gr. F11 | K11597 | 1¼Cr-½Mo forging | 485 | 275 | 20% | up to +565°C | Refinery forged valves |
A182 Gr. F22 | K21590 | 2¼Cr-1Mo forging | 585 | 415 | 20% | up to +595°C | Very high-temp forged valves |
A182 Gr. F91 | K90901 | 9Cr-1Mo-V forging | 585 | 415 | 20% | up to +649°C | Ultra-high-temp power plant |
A350 Gr. LF2 | K03011 | Low-temp forging | 485 | 250 | 22% | −46°C | Cryogenic forged valves |
Chemical Composition — ASTM A216 WCB (Mass %)
Element | C | Mn | P | S | Si | Cr+Mo+V+Ni+Cu |
|---|---|---|---|---|---|---|
WCB Max. | 0.30 | 1.00 | 0.040 | 0.045 | 0.60 | ≤1.00 (each) |
Kalpataru sources mill-certified material only, with full traceability from melt to finished valve. All forgings and castings are supplied with NACE MR0175/ISO 15156 compliance documentation on request.
Pressure-Temperature Ratings for Carbon Steel Valves
All Kalpataru carbon steel valves are pressure-rated in accordance with ASME B16.34 and, where applicable, API 600 / API 602. The P-T ratings below apply to ASTM A216 WCB (Group 1.1 per ASME B16.34) — the most widely specified cast carbon steel grade for general-purpose valves.
ASME B16.34 — ASTM A216 WCB P-T Ratings (Group 1.1)
Pressure Class | 150# | 300# | 600# | 900# | 1500# | 2500# |
|---|---|---|---|---|---|---|
Max. Working Pressure @ −29°C to +38°C | 19.6 bar (285 psi) | 51.1 bar (740 psi) | 102.1 bar (1480 psi) | 153.2 bar (2220 psi) | 255.3 bar (3705 psi) | 425.5 bar (6170 psi) |
Max. Working Pressure @ +260°C | 14.8 bar (215 psi) | 38.6 bar (560 psi) | 77.2 bar (1120 psi) | 115.8 bar (1680 psi) | 193.0 bar (2800 psi) | 321.7 bar (4665 psi) |
Max. Working Pressure @ +425°C | 11.0 bar (160 psi) | 28.6 bar (415 psi) | 57.2 bar (830 psi) | 85.8 bar (1245 psi) | 143.0 bar (2075 psi) | 238.3 bar (3455 psi) |
Max. Temperature | +425°C | +425°C | +425°C | +425°C | +425°C | +425°C |
Min. Temperature (standard) | −29°C | −29°C | −29°C | −29°C | −29°C | −29°C |
Note: For low-temperature service below −29°C, specify ASTM A352 LCB (rated to −46°C) or A352 LCC. For temperatures above +425°C, use A217 WC6 (up to +565°C) or WC9 (up to +595°C).
Forged Carbon Steel — ASTM A105 P-T Ratings (ASME B16.34, Group 1.1)
Pressure Class | 800# | 1500# | 2500# |
|---|---|---|---|
Max. Working Pressure @ +38°C | 138 bar (2000 psi) | 255 bar (3705 psi) | 425 bar (6170 psi) |
Max. Temperature | +425°C | +425°C | +425°C |
Min. Temperature | −29°C | −29°C | −29°C |
Valve Size vs. Available Pressure Classes
NPS Size Range | Available Classes |
|---|---|
½” – 1½” (forged) | 800, 1500, 2500 |
½” – 2” (forged, small bore) | 150–2500 |
2” – 24” (cast, standard) | 150, 300, 600, 900 |
2” – 36” (cast, large bore) | 150, 300 |
26” – 60” (special) | 150 |
Kalpataru engineers can issue project-specific P-T curves for non-standard alloys, trim combinations, or service fluids on request.
Design Standards, Codes & End Connections
Applicable Design & Manufacturing Standards
Standard | Scope |
|---|---|
ASME B16.34 | Valves — Flanged, Threaded and Welding End (primary design code) |
API 600 | Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries |
API 602 | Gate, Globe, and Check Valves for Sizes DN 100 and Smaller (Forged Steel) |
API 6D | Specification for Pipeline and Piping Valves (ball, gate, check, plug) |
API 608 | Metal Ball Valves — Flanged, Threaded and Butt-Welding Ends |
API 609 | Butterfly Valves — Double Flanged, Lug- and Wafer-Type |
API 599 | Metal Plug Valves — Flanged, Threaded and Welding Ends |
BS 1873 | Specification for Steel Globe and Globe Stop and Check Valves |
BS 5352 | Specification for Steel Wedge Gate, Globe and Check Valves (small bore) |
API 598 | Valve Inspection and Testing (shell, backseat, seat test) |
ASME B16.10 | Face-to-Face and End-to-End Dimensions of Valves |
ASME B16.5 | Pipe Flanges and Flanged Fittings NPS ½ through NPS 24 |
ASME B16.47 | Large Diameter Steel Flanges NPS 26 through NPS 60 |
MSS SP-55 | Quality Standard for Steel Castings |
NACE MR0175 / ISO 15156 | Materials for H₂S (sour) service |
End Connection Types
End Connection | Symbol | Applicable Standard | Notes |
|---|---|---|---|
Raised Face Flange | RF | ASME B16.5 / B16.47 | Most common; Class 150–2500 |
Ring Type Joint | RTJ | ASME B16.5 | High-pressure (Class 600+); groove for R, RX, BX ring |
Butt Weld | BW | ASME B16.25 | Seamless piping systems; radiographic weld joint |
Socket Weld | SW | ASME B16.11 | Small bore (NPS ½–2); forged valves |
Threaded (NPT) | FNPT/MNPT | ASME B1.20.1 | Utility, instrument lines |
Full Face Flange | FF | ASME B16.5 | Cast iron mating flanges; Class 125/150 |
Groove / Victaulic | GE | Manufacturer std. | Fire protection, HVAC |
Bonnet Design Types
Bonnet Type | Code | Typical Application |
|---|---|---|
Bolted Bonnet | BB | Standard gate, globe valves; easy field maintenance |
Pressure-Seal Bonnet | PSB | Class 900–2500 high-pressure; self-energising seal |
Welded Bonnet | WB | Non-maintainable; cryogenic or clean-room service |
Screwed Bonnet | SB | Small-bore utility service |
Union Bonnet | UB | Forged, small bore; quick-access inspection |
Kalpataru can supply valves with extended bonnets for insulated pipelines, and low-temperature extensions for cryogenic service down to −46°C. All bonnet-to-body bolting uses ASTM A193 B7 / A194 2H studs and nuts as standard, with A320 L7 / L7M available for low-temperature or sour service.
Industrial Applications of Carbon Steel Valves
Carbon steel valves are the backbone of global process piping infrastructure. Their combination of high tensile strength, wide pressure-temperature range, weldability, and cost-effectiveness makes them the preferred choice across virtually every heavy industry.
Oil & Gas — Upstream, Midstream & Downstream
In upstream production, carbon steel gate valves and ball valves provide reliable wellhead and manifold isolation in high-pressure sour-gas environments (NACE MR0175). Midstream pipeline operators specify ASTM A216 WCB check valves to prevent backflow in trunk and distribution lines. Downstream refineries rely on API 600 WCB gate valves in class 300–2500 for crude distillation, vacuum, FCC, and hydrocracker unit block-valve service.
Power Generation
Coal, gas, and nuclear power stations use A217 WC6 and WC9 globe valves for main steam and reheater throttling service at temperatures up to +595°C. A105 forged globe valves and gate valves handle boiler feedwater, attemperator, and drain lines. Cast-steel check valves protect feed pumps against reverse rotation.
Petrochemical & Chemical Processing
Ethylene crackers, ammonia plants, methanol synthesis, and polymer processing plants specify carbon steel valves rated to API 600 and ASME B16.34 for high-temperature, high-pressure hydrocarbon and ammonia streams. A105N forged valves are selected where NACE MR0175 compliance is required in sour or H₂S-containing streams.
Water Treatment & Distribution
Municipal water works, desalination plants, and irrigation systems use large-bore (NPS 4–36) WCB gate valves and resilient-seated butterfly valves for on/off and throttling service in potable water, raw water, and effluent mains. Carbon steel knife-edge gate valves handle sludge and slurry in wastewater treatment.
Marine, Offshore & LNG
A352 LCB and LCC carbon steel valves are specified for sub-zero ambient service on offshore platforms, LNG loading arms, and regasification terminals. Their minimum design temperature of −46°C makes them a cost-effective alternative to stainless steel for non-cryogenic cold-service duties.
HVAC & Building Services
Carbon steel ball valves and gate valves are widely used in large commercial HVAC systems, district heating networks, and industrial cooling water circuits where steel piping is preferred over copper or plastic.
Duplex 2205 (UNS S31803/S32205) and super duplex 2507 (UNS S32750) differ primarily in alloy content and corrosion resistance. Super duplex grades have higher chromium (25–26%), molybdenum (3.5–5%), and nitrogen (0.24–0.32%) content, giving a PREN > 40 versus 33–38 for standard duplex. Super duplex ball valves are used in the most aggressive chloride environments — seawater, brine, chlorine, and HF service — where standard duplex may pit or crevice corrode. Both grades outperform 316L significantly in corrosive service.
Kalpataru’s duplex stainless steel ball valve range covers Class 150, 300, 600, 800, 900, 1500, and 2500 per ASME B16.34, and 1000 WOG / 2000 WOG for screwed end designs. The actual pressure-temperature rating depends on the specific grade, operating temperature, and connection type. Contact our technical team for derating calculations at elevated temperatures..
Kalpataru supplies duplex ball valve with flanged ends (ASME B16.5, Class 150–2500), threaded ends (NPT per ASME B1.20.1, BSPT per BS 21), socket weld ends (ASME B16.11), and butt weld ends (ASME B16.25). We can also supply valves with combined end connections (e.g., flanged one end, butt weld the other) to customer specifications.
Yes. We supply complete actuated valve packages including pneumatic (double-acting and spring-return), electric quarter-turn, and hydraulic actuators, along with solenoid valves, positioners, limit switches, and junction boxes. Actuated duplex steel valves are available pre-assembled, tested, and tagged for direct installation.
You can request our current duplex steel ball valve price list by sending your inquiry to our sales team with the required grade, size, pressure class, end connection, and quantity. We respond within 24 hours with a detailed quotation and delivery timeline. Bulk project inquiries receive priority response with volume-based pricing.
Get Your Duplex Steel Ball Valve Quote Today
Kalpataru Piping Solution is your trusted duplex steel ball valve manufacturer and supplier in Mumbai, India. Whether you need a single valve for a replacement or 500 pieces for a new offshore project, we deliver on time with full certifications.
- Email: info@kalpatarupipingsolution.com
- Phone: +91 22-66337137
- Location: Mumbai, Maharashtra, India