Fully Welded Ball Valve

African Valve, a Fully Welded Ball Valve Supplier in Algeria, supplies fully welded ball valves with a welded body construction designed to provide a robust pressure boundary and reduce external body-joint leakage paths. These valves are commonly selected for long-distance pipelines, buried pipelines, natural gas transmission, petrochemical facilities, LNG infrastructure and other applications where a compact and durable valve construction is required.

Fully welded ball valves can be supplied in floating or trunnion-mounted configurations, with different pressure classes, materials, seat arrangements and operating methods depending on the service and project requirements.

Technical Specifications

Materials & Components

• Body: ASTM A105, ASTM A350 LF2, ASTM A216 WCB, ASTM A352 LCB, ASTM A182 F304, ASTM A182 F316, Duplex and Super Duplex Stainless Steel, depending on the design
• Ball: Stainless steel, Duplex, Super Duplex and other suitable alloys
• Stem: AISI 316, AISI 410, 17-4PH and Duplex Stainless Steel options
• Seat: PTFE, RPTFE, reinforced PTFE, PEEK, nylon or metal seats, depending on service requirements
• Seat Spring: Stainless steel or alloy steel
• Stem Seal: PTFE, graphite or low-emission packing
• Bearing: Stainless steel, PTFE-based composite or bronze, where applicable
• Bolting: ASTM A193 B7, B8 or B8M with compatible ASTM A194 nuts, where applicable
• Coating: Epoxy, fusion-bonded epoxy

Testing & Standards

The standards applicable to a fully welded ball valve depend on its construction, pressure rating, materials, end connections and intended service. Depending on the design, relevant requirements may include API 6D, ISO 14313, ASME B16.34, ASME B16.10, ASME B16.5, ASME B16.25, API 598 and ISO 5208.

Where fire-safe performance is required, the valve can be designed and tested to the applicable fire-testing standard, such as API 607 or API 6FA, subject to the specific valve construction and project specification.