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TitlePipe Fitter Trainee
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Page 1

PIPE FITTER TRAINING MODULE

1 PIPE FITTER MATHEMATICS

TOPICS

1.1 LINEAR MEASUREMENTS

1. PIPE FITTER MATHEMATICS

1.2 CONVERSION OF UNITS

1.3 BASIC GEOMETRY

1 4 BASIC TRIGONOMETRIC/ SOLID MENSURATION1.4 BASIC TRIGONOMETRIC/ SOLID MENSURATION

1 6 SOLVING FOR ROLLING OFFSET

1.5 SOLVING FOR SIMPLE OFFSET 45 °

1.6 SOLVING FOR ROLLING OFFSET

1.7 SOLVING FOR 90° ELBOW L.R.
1.8 SOLVING FOR 45° ELBOW

EEI CORPORATION
Page 1 of 57

Page 2

1.1 LINEAR MEASUREMENTS

ENGLISH SYSTEM

1
16

3
16

5
16

7
16

9
16

11
16

13
16

15
16

1 2

1
8

2
8

3
8

5
8

6
8

7
8

1 2 3 4 5 28 3029 31

1211

mm

inch

METRIC SYSTEM

1 2 3 4 5 28 3029 31mm

METRIC SYSTEM

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Page 28

1.6 SOLVING FOR ROLLING OFFSET

R

FORMULA :

A

ROLL

A = ROLL 2 + SET 2

TRAVEL

E

SET TRAVEL = A x 1.414

RUN = A x 1
AN

GL
E

RUN 1.414 = cosecant of angle of
NOTE :
1.414 cosecant of angle of

45 ° fitting
1 = cotangent of angle of 45 °

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fitting

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Page 29

1.6 SOLVING FOR ROLLING OFFSET

EXAMPLE :

The roll of a 45 ° offset is 8 in. and the set is 15 in. Find
the len gth of the travel and run.

FORMULA :

g

A = ROLL 2 + SET 2 A = 8 2 + 15 2 = 17 in.

TRAVEL = A x 1.414

RUN = A x 1

TRAVEL = 17 x 1.414 = 24 1 / 32 in.

RUN = 17 x 1 = 17 in.

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RUN A x 1 RUN 17 x 1 17 in.

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Page 56

3. STANDARD TRADE SYMBOLS

PIPE JOINT SYMBOL

- WELDED JOINT

- SOLDERED

- BELL & SPIGOT

- SCREWED

- FLANGE

- SOCKET WELD

- BUTT WELD

EEI CORPORATION

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Page 57

3. STANDARD TRADE SYMBOLS

VALVES

- BALL VALVE - CONTROL VALVEBALL VALVE

- GLOBE VALVE

- CHECK VALVE

CONTROL VALVE

- DIAPHRAGM VALVE

- PLUG VALVE

- GATE VALVE

- NEEDLE VALVE

- BUTTERFLY VALVE

- 3 WAY VALVE

- SAFETY RELIEF VALVE

- 3 WAY VALVE

- ANGLE VALVE

EEI CORPORATION

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