Course 347: Valve Maintenance and Piping System Protection

Covers maintenance and operation of gate, globe, ball, plug, check, and special-purpose valves. Details actuators and various accessories. Explains valve selection based on application. Describes methods of protecting piping systems.

Lesson 1 - Valve Maintenance

Topics:

Threaded, welded, brazed, and flanged connections; Installing and repairing gate, globe, angle, ball, plug, and check valves

Learning Objectives:

• Discuss the factors that affect the selection of valve materials.
• Describe the various methods of connecting valves to piping.
• Identify the various types of common valves and the operating characteristics of each.
• Explain general maintenance and repair procedures for different types of valves.

Lesson 2 - Special Valves

Topics:

Installation and repair of butterfly, diaphragm, pop safety, relief, pressure-reducing, pressure-regulating, and quick-opening valves

Learning Objectives:

• Identify several types of special valves and the operating characteristics of each.
• Discuss the installation, maintenance, and repair of special valves.

Lesson 3 - Actuators and Accessories

Topics:

Actuator installation, maintenance, and repair; Bourdon tube, bimetallic, and bellows gauges; Flowmeters; Rotating unions; Accumulators

Learning Objectives:

• Explain the function and operation of a valve actuator
• Identify various types of valve actuators and describe the installation, maintenance, and repair of each.
• Discuss the operating characteristics of various accessories, including gauges, meters, accumulators, and air receivers.

Lesson 4 - Valve Selection

Topics:

Valve applications, materials, and identification; Soldered, threaded, and flanged valve connections; Tool selection; Valve positioning

Learning Objectives:

• Name the five major uses of valves in piping systems and identify the types of valves best suited for each.
• Identify and explain the factors that determine the selection of a valve for a given application.
• Identify various valve markings and symbols.
• Describe several types of valve-to-pipe connections.
• Discuss the selection and proper use of tools in valve installations.
• Explain the importance of the correct installation of valves in well-chosen locations.

Lesson 5 - Piping System Protection

Topics:

Installing and maintaining insulation; Steam tracers; Protection from freezing and corrosives; Active and passive protection; Inspection; Supports

Learning Objectives:

• Describe the methods by which heat transfer occurs.
• Discuss the methods of tracing process lines.
• Explain the various methods of protecting piping systems from heat, cold, and corrosion.
• Discuss the installation, inspection, and maintenance of insulation and other forms of piping system protection.