Pipefitter Blueprint and Drawing Interpretation 5

Question 1

On a piping drawing, the letters 'CL' with a centerline symbol (⊄) dimension refer to:

Accepted Answer

Centerline-to-centerline measurement

Answer

CL with the centerline symbol denotes a measurement taken from centerline to centerline of two pipe runs or structural members.

Question 2

A revision triangle with the number '3' in it appears next to a weld symbol on a drawing. What does this tell you?

Accepted Answer

That portion of the drawing was changed in revision 3

Answer

A revision triangle (delta) with a number indicates that area of the drawing was modified during that revision level.

Question 3

What does 'SMLS' mean when listed in a pipe specification on a drawing?

Accepted Answer

Seamless pipe

Answer

SMLS is the standard abbreviation for seamless pipe, meaning the pipe is manufactured without a longitudinal weld seam.

Question 4

On an isometric drawing, an 'anchor' symbol at a pipe support means:

Accepted Answer

The pipe is fully restrained in all directions at that point

Answer

An anchor support restrains the pipe against movement and rotation in all directions, serving as a fixed point in the piping system.

Question 5

A drawing callout reads '4" SCH 80 × 3" SCH 80 ECC RED FF.' What does 'FF' indicate?

Accepted Answer

Flat-face flange end

Answer

FF stands for flat-face, describing the flange facing type on the eccentric reducer, which mates flat against another flat-face flange.

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