Production Standard:
Design:API 600
Face to face: ANSI B 16.10
Connection Flanges: ANSI B 16.5
Connection Butt Weld: ASME B16.25
Inspection/Testing: API598

Produc Description:
Full Bore
OS&Y, Outside Screw and Yoke
BB,Bolted Bonnet
PSB,Pressure Seal Bonnet
Flexible Wedge,Fully Guided
Size: 1.1/2" to 48"
Pressure: 150LB 300LB 600LB 900LB 1500LB 2500LB
Material: Inconel 600(A494/A743 CY-40 Class 2)
Trim:Inconel 600
Operate:Handwheel,Gearbox,Penumatic Actuator,Electric Actuator

For the Class 2, the Heat Treatment shall heat to 1040°C minimum,
hold for sufficient time to heat castings to temperature,
quench in water or rapid cool by other means so as to develop
acceptable corrosion resistance

Inconel material is very good for high temperature service.
Good resistance to strongly corrosive media and
atmosphere to +800°F (+425°C).