Design and Construction: API Manual of Petroleum Measurement Standards, Chapter 4.2 Proving Systems, ASME B31.4, ASME B31.3 Radiography: 100% in accordance with API 1104 Hydrotest: 1.5 times design pressure with chart recording Inspection Flanges: Match bored, dowel pinned and O-ring groove for metal to metal seat Materials: Pipe –  ASME, ASTM, API Flanges and threaded fittings – ASME, ASTM, MSS Weld fittings – ASME, ASTM, MSS Studs – ASME, ASTM Nuts – ASME, ASTM Gaskets – Spiral Wound O-Rings – Viton Calibration: Water draw method, repeatability within 0.02 percent per API Chapter 4.9 and Chapter 12.2.4. Internal Coating: Crude, refined products – SP-5 and air dried epoxy Condensate – SP-5 and baked on phenolic LNG’s - SP-5 and baked on phenolic External Coating: SP-6 with epoxy / urethane Standard Equipment and Trim: Four way diverter valve with Viton seals and differential pressure device Detector switches – Mag-Tek® M-6, SS construction with Viton seals Valve actuator – Electric Class I Group D Div II or manual handwheel Sphere – Inflatable polyurethane, nitrile, or neoprene with accessories (pump and sizing ring) Quick opening closure, hinged or davit type Thermometers and SS thermowells Pressure device with isolation valves Pressure relief valve Drain valves Semi-skid beam supports See Prover Bulletins MPD-112 and PDS-118 for assistance. Bidirectional Provers Typical Prover Specifications All materials and equipment selected for Weamco provers are of the highest quality and consistency. Selection is based on proven industry standards. 2350 Industrial Road, Sapulpa, OK 74066 • Main: 918-445-1141 • Bulletin BDP-112 Toll Free: 800-331-3790 • Fax: 918-445-4617 • 5-19 Page 2 of 2