Unit 317 L.05 Gas Pipework

Include jointing techniques that can be used

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Identify pipework materials suitable for use on gas supply

Gas Pipe

Open Ended

What are some key considerations when installing an emergency control valve (AECV) to a gas supply system?

Open Ended

Describe the main features and installation requirements of a flexible connector for flueless appliances, according to BS 669 Part 1:1989.

Multiple Choice

Which of the following is NOT a requirement for a flexible connector used to connect flueless appliances such as cookers?

• It must include a spring loaded valve for isolation and disconnection.

• It must be subjected to excess force such as tight bends.

• It must not be subjected to excess heat above 70°C.

• It must incorporate a bayonet style connector.

Multiple Choice

Why is it important to secure a cooker with a chain when connecting gas hoses to appliances that may need to be moved?

• To prevent the cooker from being pulled further than the limit of the gas hose.

• To keep the cooker stable during cooking.

• To ensure the gas hose remains straight.

• To avoid accidental disconnection of the gas hose.

Access the quiz allocated to you on Wayground (gas pipework)

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​Using your MS Teams

Open Ended

Explain the purpose of Regulation 9(1) in relation to emergency controls for gas supply installations.

Fill in the Blanks

An emergency control is a suitable valve fitted in an accessible location which can be used to turn off the gas to the

property.

Multiple Choice

Which of the following statements best describes the requirement for emergency control valves in domestic gas systems?

• Emergency control valves must be fitted at the supply to the gas meter and be easily accessible.

• Emergency control valves can be installed anywhere in the property.

• Emergency control valves are only required for commercial properties.

• Emergency control valves should be hidden for safety.

Multiple Choice

Which of the following is a requirement for installing an emergency control valve (ECV) according to the guidelines shown?

• The lever must turn off the supply when in the downward position.

• The lever must turn off the supply when in the upward position.

• The lever must be installed horizontally.

• The lever must be painted red.

Open Ended

Why is it important for the emergency control valve (ECV) to be accessible and able to move fully to the off position without restriction?

Multiple Choice

According to the images, under which circumstances are additional emergency controls required for gas supply?

• When the meter installation is more than 6 metres from the property.

• When the meter installation is less than 6 metres from the property.

• When the gas supply is only used by one person.

• When the gas supply is not used in flats.

Open Ended

What steps should be taken if gas continues to escape after shutting off the supply, according to Regulation 9 of the GSIUR?

Fill in the Blanks

Regulation 9 of the GSIUR requires a notice to tell the consumer to shut off the supply of gas if there is a gas

in the premises.

Multiple Choice

Which of the following is NOT listed as an objective for confirming the integrity of gas pipework installations?

• Check that conditions within the gas system will allow safe commissioning.

• Know how to use the correct tools and equipment.

• Install gas pipework up to 50mm diameter.

• Tightness testing procedures to confirm the integrity of the installed pipework installation.

Multiple Choice

Which regulations apply to domestic gas tightness test procedures?

• GSUIR Regulation 22 and 23

• IGEM/UP/1B Edition 3

• IGEM/UP/2 Edition 2

• BSI Regulation 10

Multiple Choice

When and why might we carry out a tightness test?

• After alteration to, replacement of, or re-use of existing installations

• Only after a gas leak is confirmed

• Only when installing new appliances

• Only during annual inspections

Open Ended

Describe situations where tightness testing may apply even if gas appliances are not connected or are isolated.

Multiple Select

Which of the following equipment can be used for measuring pressure during gas soundness testing?

• U gauge (water gauge or U-tube manometer)

• Digital thermometer

• Electronic pressure gauge

• Barometer

Fill in the Blanks

A water gauge should be filled and zeroed using

.

Open Ended

Explain why it is important to ensure both sides of a water gauge are level at 0mbar before taking a reading.

Multiple Choice

According to IGE/UP/1B, what is the required accuracy for electronic pressure gauges?

• 0.5 mbar

• 0.1 mbar

• 1.0 mbar

• 0.25 mbar

Multiple Choice

Which of the following is a reason electronic gauges are preferred over water gauges when commissioning differential pressures on modern appliances?

• Electronic gauges are less expensive

• Electronic gauges are more accurate

• Electronic gauges are easier to install

• Electronic gauges are more durable

Open Ended

List the types of installation pipework covered by the IGE/UP/1B specifications and procedures for systems with a Maximum Operating Pressure (MOP) of 75mbar or less.

Open Ended

What is the purpose of the 'let by test' in gas supply systems, and what does perceptible movement in the gauge indicate?

Multiple Choice

Which of the following conditions must ALL be met for the tightness test procedure to apply to a section of pipework according to IGE/UP/1B?

• MOP at the outlet of the ECV not exceeding 2 bar, operating pressure at the outlet of the meter of 21mbar, nominal bore no greater than 35mm, maximum rated capacity of 16m³/h, maximum installation volume of no more than 0.035m³

• MOP at the outlet of the ECV exceeding 2 bar, operating pressure at the outlet of the meter of 21mbar, nominal bore no greater than 35mm, maximum rated capacity of 16m³/h, maximum installation volume of no more than 0.035m³

• MOP at the outlet of the ECV not exceeding 2 bar, operating pressure at the outlet of the meter of 21mbar, nominal bore no greater than 35mm, maximum rated capacity of 20m³/h, maximum installation volume of no more than 0.035m³

• MOP at the outlet of the ECV not exceeding 2 bar, operating pressure at the outlet of the meter of 25mbar, nominal bore no greater than 35mm, maximum rated capacity of 16m³/h, maximum installation volume of no more than 0.035m³

Fill in the Blanks

Fill in the blank: The formula to calculate the total system volume for carrying out the tightness test is Total m³ = Mv + Pv +

.

Open Ended

Reflecting on today's lesson about gas pipework and valves, what is one key safety consideration you learned when working with gas installations in domestic or small commercial premises?

Multiple Choice

What is the purpose of installing an additional emergency control valve (AECV) in a gas supply system?

• To regulate the flow of gas during normal operation

• To provide a shut-off mechanism in case of emergency

• To increase the pressure in the gas pipework

• To connect multiple gas appliances