STANDARD API 600 ISO 10434 - Gate ValveFlanged and Butt-welding Ends, Bolted Bonnet BS 1873 - Steel Globe valves. BS 1868 Steel Check valves. ASME B16.34 Flanged, Threaded, and Welding End ASME B16.10 Face to face and end to end dimensions. API 598 Valve inspection and testing ASME B16.25 Butt welding ends ASME B16.5- Flanges and Flanged Fittings APPROVALS BONETTI low pressure Gate Globe and Check valves are manufactured in accordance to ISO 9001:2008 and approved according - Pressure Equipment Directive 9723ES (PED) - Indian Boiler Regulations-1950 ACTUATED VALVES