Equal Reducing Rubber 90 Degree Elbow

Page 125

Equal Reducing Rubber

90 Degree Elbow

Information Required: Small Pipe Diameter,

Large Pipe Diameter, Insulation Thickness

Step 1: Draw a 90-degree angle

Step 2: Square the fittin from weld to weld

using a framing square. Using that

measurement, swing an arc to form cut-line

A.

Step 3: Multiply the OD of the small pipe

(insulation included) by Pi and then divide

by 2 and add one inch. Mark this easy

recent on the vertical line using cut-line A as

a starting point. Label this point 1.

Step 4: Multiply the OD of the large pipe

(insulation included) by Pi and then divide

by 2, and then add one inch. Mark this

measurement on the horizontal line using

cut-line A as a starting point. Label this

point 2.

Step 5: Draw a line from point 1 to point 2

and divide that line into 2 equal parts. Label

the division point 3.

Step 6: At point 3 draw a 0- degree line

perpendicular to line 1-2 to an interesting

point on the extended vertical line. This

point is Apex B.

Step 7: Set dividers from the apex B point to

number 1 and draw an arc to number 2 to

form cut-line B.

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