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Radius Bend (Duct) - eCollege

TRADE OF Industrial Insulation PHASE 2 Module 5 Ductwork & Vessels unit : 2 Radius Bend (Duct) Produced by In cooperation with subject matter expert: Michael Kelly SOLAS 2014 Module 5 unit 4 Industrial Insulation Phase 2 Radius Bend (Duct) Revision , August 2014 Table of Contents Introduction .. 1 unit Objective .. 2 Measuring and Sketching .. 3 Measuring Finding the Radius of a Rectangular Duct Bend .. 3 3D Sketching Isometric Projection .. 3 First and Third Angle Orthographic Projection .. 3 Calculation of Insulation Allowances .. 3 Area Calculation for Sheet Size .. 4 Use of Manufacturers Data Sheets .. 4 Marking Out and Fabrication.. 5 Marking-Out Techniques and joint Selection for Large Radius Bends5 Pattern Development Parallel Line Development.

The choice of joints or seams selected, will depend on the knowledge and skills of the operator. Large radius bends are generally marked out on a sheet using a set of trammel points. Refer to module 1 – unit 3 – section 1.0 – Hand tools. 2.2 Pattern Development – Parallel Line Development See Module 2 – Unit 3 – Parallel Line ...

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