This article is about how to do pipe insulation with cold and hot method.
EQUIPMENT AND PIPE INSULATION PROCEDURE
(i) All insulation materials shall be stored, mixed, thinned and applied in accordance with the manufacturer’s printed instructions.
(ii) All conflicts between the method statement and manufacturer’s instructions shall be brought to the attention of Contractor for resolution.
(iii) Insulation material shall not be applied over wet surfaces.
(iv) Insulation material section shall be trimmed as required to achieve tight fit without voids.
(v) Fabricated or preformed insulation shall fit curvature of the surface to be insulated.
(vi) If applying single layer insulation other than hinged pipe covering the circumferential butt joints of each half section shall be staggered.
(vii) If applying multi layer Insulation material each layer shall be staggered to the longitudinal and circumferential joint of the layer beneath.
(viii) Each layer of insulation shall be held in place separately.
(ix) Insulation shall be applied as single layer for thickness less than 90mm.
(x) All insulation shall be free from cracks, voids and gaps. All cracks, voids etc greater than 3mm shall be refitted not filled.
(xi) Vessels and tanks shall be insulated with blanket insulation.
(xii) Installed insulation shall have the required permanent or temporary protection applied before the conclusion of days work.
(xiv) Insulation material shall be handled and disposed of in accordance with applicable federal, state, and local laws and regulations
(xv) SS piping & Equipment shall be insulated with SS wire mesh blankets to avoid bi – Metallic corrosion
(xvi) Piping’s, Equipment’s & Vessel shall be tested & inspected as required by relevant specification prior to installation of insulation.
(xvii) Removable or flexible type insulation shall be used in areas where access for frequent maintenance is necessary
(xvii) Name plates shall not be insulated and shall be attached with extended brackets to give adequate clearance for full insulation thickness.
Types of Insulation
1. Hot Insulation
The Hot insulation installation will cover the following two major categories in this Project
Hot Insulation for Piping & Hot Insulation for Equipment
Hot Pipe insulation Procedure for Piping
The hot Pipe insulation of piping shall have mainly 6 activities.
(i) All Pipe insulation materials shall be protected from rain and moisture.
(ii) Pipe insulation sections shall be trimmed as required to achieve close fit to avoid major void and gaps.
(iii) All hot piping insulation shall be done with mineral fiber (blanket/section)
(iv) All piping insulation with single layer less than or equal to 8” shall be installed by preformed pipe section.
(v) Sectional Pipe insulation shall be sized to eliminate gaps and voids between surfaces and the insulation.
(vi) Sectional Pipe insulation shall be applied so all end joints are staggered.
(vii) Pipe insulation shall be secured with SS wire or Bands spaced at max. 250mm.
(viii) For vertical piping Pipe insulation the support ring will install directly above all elbows, flanges or flanged valves. Additional support will install at every 6425 mm of uninterrupted length.
(ix) Elbow 4” and over shall be insulated with mitered cut.
(x) Pipe insulation shall terminate at a distance of (bolt length+25mm) flanges and valves occur.