Page 108 - CITS - Welder - Trade Theory

WELDER - CITS

Development drawing for pipe Elbow joint

Objectives : At the end of this lesson you shall be able to
• develop and layout the pattern for 90° elbow joining two equal diameter pipe by parallel line method.

Develop the pattern for a 90° elbow of equal diameter pipes by parallel line method.

Draw plan as shown in Fig 1.
Below this, draw the front elevation as shown in Fig 2.
Fig 1 Fig 2

Divide the circle in the plan into twelve equal parts and number the points 0 to 12 as shown in Fig 3.

Fig 3

Draw the perpendicular line from these points towards the front view and number 1 to 12 as shown in Fig 4.

Fig 4

Development drawing for pipe “T” joint

Objectives : At the end of this lesson you shall be able to
• develop and layout the pattern for 90° “T” pipe of equal diameter by parallel line method.

Develop the pattern for a 90° “T” pipe of equal diameter by parallel line method:
Draw the front view as shown in Fig 1.

Draw the side view as shown in Fig 2

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CITS : C G & M - Welder - Lesson 14-26 CITS : C G & M - Welder - Lesson 14-26