GP 62-01 (5.3.3 and 9.10) Pig launcher / receiver valves

What is a crucial requirement for lubricated balanced plug valves to be used in pig launcher/receiver systems?

• Resistance to high velocities

• Regular reinjection of lubricant

• Soft seating design

• Low-cost maintenance

What type of valve should be used for launcher isolation to ensure positive isolation regardless of line pressure?

• Soft seated ball valve

• Metal seated trunnion mounted ball valve

• Tungsten carbide-coated expanding gate valve

• Globe valve

What is an essential characteristic of expanding type gate valves used for launcher isolation?

• Unidirectional

• Soft seated

• Bidirectional

• Low-pressure rating

What is a crucial consideration for soft seated ball valves in pig trap kicker and vent valve applications, especially concerning their function during throttling?

• Ability to withstand high velocities

• Resistance to abrasion

• Cost-effectiveness

• Throttling capabilities

What is a key consideration for pig trap kicker valves and vent valves, especially on gas service?

• Low cost

• Withstanding high velocities

• Soft seated design

• Throttling capabilities

In LP applications with a Class 600 or lower rating, what type of valve may be used if the service is clean?

• Soft seated ball valve

• Metal seated gate valve

• Triple offset butterfly valve

• Globe valve

Which type of valve is recommended for primary pipeline isolation in pig launcher/receiver systems?

• Soft seated ball valve

• Metal seated gate valve

• Triple offset butterfly valve

• Lubricated balanced plug valve

Which valve type is NOT recommended for isolating receivers that can be reverse pigged?

• Tungsten carbide-coated slab gate valve

• Soft seated ball valve

• Ball valve

• Soft seated gate valve

In the blowdown sequence for gas service, what should be depressurized first?

• The space between the valves

• The pig trap

• The pipeline

• The valve seats

What is recommended for receiver drain valves to ensure abrasion resistance?

• Soft coated plugs

• Tungsten carbide-coated balls

• Soft seated ball valves

• Metal seated gate valves