Technical Datasheet & Specifications
| Parameter | Specification |
|---|---|
| Product Name | Alloy 20 Valve (UNS N08020 / CN7M) |
| Specification | Alloy 20 (Carpenter 20) Gate / Globe / Ball / Check, Class 150/300, Sulfuric Acid Service |
| Category | Corrosion Resistant Valves |
| Standard | ASME B16.34, API 600, API 602, API 603, API 598 |
| Applications | Sulfuric Acid Service, Mining & Pickling, Pharmaceutical, Chemical Processing |
| Parameter | Specification |
|---|---|
| Body Material | Alloy 20 (Carpenter 20) -- ASTM A351 CN7M (cast, UNS J95150) / B473 N08020 (wrought) |
| Trim (Disc/Ball/Gate) | Alloy 20 (CN7M / N08020) |
| Seat | Alloy 20 / PTFE / RPTFE |
| Stem | Alloy 20 (B473 N08020) |
| Gasket | PTFE / Spiral wound PTFE-filled |
| Bolting | Alloy 20 / ASTM A193 B8M |
| Standard | ASME B16.34, API 600, API 602, API 603, API 598 |
| Alternative Materials | Available as Gate, Globe, Ball, and Wafer Check patterns; Hastelloy / Monel upgrades on request |
| Parameter | Specification |
|---|---|
| Valve Size Range | 1/2" to 24" (DN15 – DN600) |
| Pressure Rating | Class 150 / 300 (PN16 / PN25) |
| Shell Test Pressure | Hydrostatic 3.1 MPa (450 psi) |
| Seat Test Pressure | Hydrostatic 2.2 MPa (320 psi) |
| End Connection | Flanged RF per ASME B16.5 / Screwed / Socket Weld |
| Face-to-Face | ASME B16.10 |
| Operation | Alloy 20 (high Cr-Ni-Mo with copper) resists pitting, crevice corrosion, and stress-corrosion cracking in hot sulfuric acid -- supplied as gate, globe, ball, or wafer check for acid and mining service |
| Test | Requirement |
|---|---|
| Shell Test | 1.5 x Rated Pressure (min) |
| Seat Test | 1.1 x Rated Pressure (min) -- Bubble-tight zero leakage |
| Back Seat Test | 1.1 x Rated Pressure (where applicable) |
| Hydrostatic Test | Water at ambient temperature |
| Pneumatic Test | Available on request |
| NDT | 100% MPI/DPT on machined surfaces (if specified) |
| PMI | Positive Material Identification available |
| Visual Inspection | MSS SP-55 / Project specification |
| Dimensional Check | As per drawing / standard |
| Marking | MSS SP-25 / Project specification -- Size, Class, Material, Heat No., Tag No., Serial No. |
| Standard | Description |
|---|---|
| API 600 / BS 1414 | Steel Gate Valves -- Flanged and Butt-Welding Ends |
| API 623 / BS 1873 | Steel Globe Valves -- Flanged and Butt-Welding Ends |
| API 594 / BS 1868 | Check Valves -- Flanged, Lug, Wafer and Butt-Welding |
| API 608 | Metal Ball Valves -- Flanged, Threaded and Welding End |
| API 609 | Butterfly Valves -- Double Flanged, Lug and Wafer Type |
| API 6D | Pipeline Valves (Ball, Check, Gate, Plug) |
| ASME B16.34 | Valves -- Flanged, Threaded and Welding End |
| ASME B16.5 | Pipe Flanges and Flanged Fittings |
| ASME B16.10 | Face-to-Face and End-to-End Dimensions of Valves |
| ASME B16.25 | Buttwelding Ends |
| MSS SP-25 | Standard Marking System for Valves |
| MSS SP-55 | Quality Standard for Steel Castings |
| ISO 5208 | Pressure Testing of Metallic Valves |
| API 598 | Valve Inspection and Testing |
| API 607 / ISO 10497 | Fire Test for Soft-Seated Quarter-Turn Valves |
| BS EN ISO 15848-1 | Fugitive Emission Testing (Class B) |
| Document | Availability |
|---|---|
| Material Test Certificate (MTC) | EN 10204 3.1 (standard) / 3.2 (on request) |
| Factory Test Report | Hydrostatic shell test + seat test |
| NDT Report | MPI / DPT / RT / UT (as specified) |
| PMI Report | Positive Material Identification |
| Fire Safe Certificate | API 607 / ISO 10497 (where applicable) |
| Fugitive Emission Certificate | BS EN ISO 15848-1 Class B (where applicable) |
| Third-Party Inspection | TUV / SGS / BV / Lloyds (client cost) |
| Calibration Certificate | Pressure gauges, instruments |
| Packing List | Per shipment |
| Commercial Invoice | With HS code, value, Incoterms |
| Bill of Lading | As per shipment terms |
Supreme Enterprise
Industrial Valves & Engineering Solutions
4th Floor, Survey No. 235/A and 247/A, E/401,
Nr. Bhattha School, Gyaspur,
Ahmedabad, Gujarat 382405, India
Branch: Mehta House, Relief Road, Ahmedabad 380001
GST: 24AFAFS5839J1ZQ • IEC: AFAFS5839J
Email: info@supremevalves.in
Phone: +91 97732 78770
Web: www.supremevalves.in
The Alloy 20 Valve (UNS N08020 / CN7M) is designed, manufactured, and tested in accordance with ASME B16.34, API 600, API 602, API 603, API 598. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is Alloy 20 (Carpenter 20) -- ASTM A351 CN7M (cast, UNS J95150) / B473 N08020 (wrought). Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in 1/2" to 24" (DN15 – DN600) with Class 150 / 300 (PN16 / PN25). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.