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Flange Specifications in ANSI/ASME Standards

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Flange Specifications in ANSI/ASME Standards

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Questions and Answers

Which ANSI/ASME standard covers the requirements for steel flanges from NPS 26 through NPS 60?

ANSI/ASME B16.1

ANSI/ASME B16.5

ANSI/ASME B16.24

ANSI/ASME B16.47 (correct)

Which ANSI/ASME standard specifies the requirements for cast iron pipe flanges and flanged fittings?

ANSI/ASME B16.5

ANSI/ASME B16.1 (correct)

ANSI/ASME B16.42

ANSI/ASME B16.24

What is the maximum pressure rating for non-ferrous flanges according to the text?

150 psi

900 psi

300 psi

2500 psi (correct)

What is the requirement when 150 psi steel flanges are bolted to Class 125 cast-iron flanges?

The raised face on the steel flange shall be removed Signup and view all the answers

When are lapped flanges permitted to be used according to the text?

Only above ground Signup and view all the answers

What is the requirement for connecting raised-face flanges to flat-faced cast iron, ductile iron or non-ferrous material flanges?

Raised-face flanges shall not be joined to flat-faced cast iron, ductile iron or non-ferrous material flanges Signup and view all the answers

Which of the following is NOT an acceptable material for gaskets?

Teflon Signup and view all the answers

Which standard should non-metallic flange gaskets comply with?

ANSI/ASME B16.21 Signup and view all the answers

What should be done when a flanged joint is separated?

The gasket should be replaced Signup and view all the answers

Which of the following statements about gas meter location is NOT true?

Gas meters can be located where they will be subjected to extreme temperatures Signup and view all the answers

What is required to protect gas meters?

All of the above Signup and view all the answers

When is a line pressure regulator required to be installed?

When the gas supply pressure exceeds the maximum allowable inlet pressure of the appliance served Signup and view all the answers