Technical Datasheet & Specifications
| Parameter | Specification |
|---|---|
| Product Name | 254 SMO Monoflange Double Block & Bleed Valve |
| Specification | Monoflange DBB Instrument Valve, 254 SMO (6Mo), Block-Block-Bleed |
| Category | Instrumentation -- Monoflange DBB |
| Standard | ASME B16.34, IEC 61518, NACE MR0175, API 598 |
| Applications | Instrumentation, Transmitter Hookups, Chloride/Sour Service, Offshore Platforms |
| Parameter | Specification |
|---|---|
| Body Material | 254 SMO Super Austenitic Stainless Steel (UNS S31254 / 6Mo) |
| Isolation Configuration | Primary block (OS&Y needle / ball) + secondary block + bleed (DBB) |
| Stems | 254 SMO / SS316 anti-tamper, non-rotating tip |
| Gland Packing | PTFE / Graphite, fire-safe |
| Bonnet Seals | Metal-to-metal + Graphite (fire-safe API 607) |
| Bolting | ASTM A193 B8M / B7M |
| Standard | ASME B16.34, IEC 61518, NACE MR0175, API 598 |
| Alternative Materials | Duplex 2205, Super Duplex, Alloy 625, and SS316 monoflange bodies available on request |
| Parameter | Specification |
|---|---|
| Valve Size Range | 1/2" to 2" instrument × flanged process connection |
| Pressure Rating | Class 150 to Class 900 |
| Shell Test Pressure | Hydrostatic 7.7 MPa (1125 psi) |
| Seat Test Pressure | Hydrostatic 5.6 MPa (815 psi) |
| End Connection | Flanged process × NPT / OD-tube / flanged instrument (per hookup) |
| Face-to-Face | Compact monoflange |
| Operation | Replaces conventional flanged spool plus block-block-bleed valve manifolds with a single forged monoflange -- 254 SMO 6Mo body for superior chloride pitting and sour-service resistance |
| 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 254 SMO Monoflange Double Block & Bleed Valve is designed, manufactured, and tested in accordance with ASME B16.34, IEC 61518, NACE MR0175, API 598. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is 254 SMO Super Austenitic Stainless Steel (UNS S31254 / 6Mo). 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 2" instrument × flanged process connection with Class 150 to Class 900. 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.