BS 5970:2001

$215.11

Code of practice for thermal insulation of pipework and equipment in the temperature range of -100°C to +870°C

Published By	Publication Date	Number of Pages
BSI	2001	126

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Categories: 91.100.60 - Thermal and sound insulating materials, BSI

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PDF Pages	PDF Title
1	BRITISH STANDARD
2	Committees responsible for this British�Standard
3	Contents
7	1 Scope 2 Normative references
8	3 Definitions 3.1 finishing materials 3.2 coating 3.3 paint 3.4 polymeric plastics compound 4 Exchange of design data 4.1 Information to be supplied by the purchaser
10	4.2 Information to be supplied by the manufacturer or contractor 4.3 Drawings and documentation
11	5 Factors affecting planning and programming 5.1 Because insulation contractors’ operations on site are dependent upon the progress of other c… 5.2 Examples of factors that could affect the insulation contractor’s work are as follows: 6 Typical characteristics of insulating materials and systems 6.1 Thermal conductivity
12	6.2 Physical forms 6.3 Bulk density 6.4 Suitability for service temperature
13	Table 1 — Typical insulating materials for use at temperatures higher than ambient
15	Tabel 2 — Typical insulating materials for use at temperatures below ambient 6.5 Thermal expansions
16	6.6 Resistance to compaction 6.7 Resistance to water vapour penetration and to water absorption 6.8 Mechanical strength, resilience and durability 6.9 Fire and explosion hazards
18	6.10 Resistance to vermin, fungus and moulds 6.11 Health hazards
19	6.12 Removal and replacement 6.13 Heat capacity 6.14 Freedom from objectionable odour 6.15 Corrosion
23	6.16 Chemical resistance 6.17 Maintenance requirements
24	7 Selection of thermal insulating materials 7.1 General 7.2 Types available
25	7.3 Typical properties of thermal insulating materials
26	7.4 Typical dimensions 7.5 Applicability of thermal insulating materials
29	8 Selection of securing materials 8.1 General 8.2 Adhesives
31	Table 3 — Insulation bonding adhesives for pre-formed sections and slabs
34	8.3 Mechanical securements
35	8.4 Combination 8.5 Insulation hangers 9 Selection of vapour barriers 9.1 General
37	Table 4 — Typical values for water vapour permeance
38	Table 5 — Water vapour permeance conversion table
40	9.2 Vapour barriers for use over insulation applied to surfaces below dew-point 9.3 Vapour barriers for use over insulation applied to surfaces below dew-point for short periods 10 Selection of finishing materials, including ultimate treatment of finish 10.1 General 10.2 Classification of finishing materials
41	10.3 Reasons for use of finishing materials 10.4 Typical uses for finishing materials
42	10.5 Finishes for refrigeration work 10.6 Finishes to improve fire protective properties 10.7 Finishes for use over pipes in enclosed spaces, ducts, subways and beneath buildings 10.8 Ultimate treatment of finish
43	10.9 Identification of the contents of a system 11 Selection of thermal insulating systems 11.1 Optimum effectiveness
44	11.2 Extent of system 11.3 General 11.4 Control factors
46	12 Site considerations — Basis and method of presenting schedule of work 12.1 Well before work at site begins, the purchaser should provide the contractor with a clear pr… 12.2 The purchaser and contractor should clearly understand their responsibilities regarding supp… 12.3 Where areas of plant to be insulated are to be left bare for a period,�e.g.�to make provisio… 12.4 Where the satisfactory application of insulating and finishing materials is likely to be dep… 12.5 In order that the contractor can operate on an efficient and economical basis, complete sect… 12.6 The contractor’s tender and purchaser’s subsequent requisition should contain a clear descri… 12.7 If a contractor is called upon to repair or modify previously completed work, the purchaser … 12.8 Before work at site is commenced, the purchaser and contractor should be in complete agreeme… 13 Packaging and transport to site 13.1 Methods of packing 13.2 Protection against crushing 13.3 Packing of plastic compositions and finishing compositions or cements
47	13.4 Methods of identification of packages 14 Labour and supervision 15 Provision of storage space, protection and safety during storage 15.1 Space should be provided for the contractor to store insulation and ancillary materials. 15.2 All materials should be stored in a dry atmosphere undercover and inspected at periods not e… 15.3 Stock rotation should be employed i.e. first in, first out. 15.4 Cartons or packs containing slab insulation should be stored flat. 15.5 Bags containing mattress insulation should be stacked flat and not more than four high. 15.6 Sheet metal should be delivered as single sheets or in bundles, dependent on the type of han… 15.7 Sheet edges should be examined at least monthly to see�if any discoloration has taken place…. 15.8 When storage for longer than�3�months is contemplated, the supplier should be consulted for … 15.9 Adhesives, coatings and mastics should be stored undercover in a dry atmosphere at a tempera… 16 Provision of power, water, light, heat and accommodation for personnel 16.1 Power and water
48	16.2 Light and heat 16.3 Accommodation and storage 17 Provision of access equipment 18 Responsibility for studs, cleats, etc. 19 Observance of site safety and security regulations 19.1 The purchaser should notify the contractor of any local site safety and security regulations. 19.2 If other work is proceeding on site, a safe working area should be defined and agreed, from … 20 Protection of adjacent equipment and surfaces 21 Clearing waste material from site 22 Health considerations
49	23 Methods of application and practical consideration 23.1 Insulating materials should be kept dry in store and during erection. 23.2 Apart from certain load-bearing materials, most types of insulating materials should be supp… 23.3 In order to maintain the thermal efficiency of the systems, all insulating materials, howeve… 23.4 Where the main insulation consists of pre-formed, or flexible material, all edges or ends sh… 23.5 As a general rule insulation work should be carried out with the plant off�load. In certain … 23.6 Before any section of the insulation work on piping, vessels or ductwork is commenced, all h… 23.7 The junction between removable and permanent insulation should be so arranged as to be readi… 23.8 One of the chief problems, when insulating complicated plant, is to provide for adequate acc… 23.9 The plant designer should allow a minimum clearance of�50�mm beyond the full extent of therm… 23.10 Where pipe banks against walls or ceilings are involved, the designer should envisage the s… 24 Surface preparation and accessories 24.1 Surface preparation 24.2 Attachments
51	24.3 Insulation supports
52	24.4 Securement 24.5 Reinforcement
53	25 Cold insulation�— Application for systems operating in the temperature range (100�ºC to ambien… 25.1 General
54	25.2 Adhesives and fastenings 25.3 Typical erection methods
56	25.4 Pipework and fittings 25.5 Vessels and large curved surfaces
57	25.6 Storage tanks 25.7 Air�conditioning ductwork operating below ambient temperature
59	25.8 Flat and irregular surfaces (including machinery) 26 Hot insulation�— Application for systems operating in the temperature range�above ambient to�8… 26.1 General Table 6 — Expansion gaps
60	26.2 Pipework
64	26.3 Vessels and large curved surfaces
67	26.4 Air ducts and gas flues
72	26.5 Flat and irregular surfaces (including machinery)
73	27 Indoor finishes and their methods of application 27.1 Sheet metal
75	Table 7 — Thickness of metal cleading
76	Table 8 — Compatibility between screws/rivets and cleading material 27.2 Aluminium foils and laminates 27.3 Mastic and coating finishes
77	27.4 Hard-setting composition, self-setting cement and gypsum plaster 27.5 Non-metallic sheet
78	27.6 Textile fabrics
79	28 Weather�resistant finishes 28.1 Sheet metal 28.2 Non-metallic sheet 28.3 Self�setting cement
80	28.4 Weatherproofing compounds
81	28.5 Roofing felt and wire netting 29 Ultimate treatment of finish painting 30 Inspection and testing 31 Maintenance recommendations 31.1 General
82	31.2 Inspection, maintenance and sealing of insulation containing asbestos 31.3 Stripping old asbestos�containing insulation 32 Guarantees 33 Design considerations 33.1 Reasons for insulation
83	33.2 Application 33.3 Economic thickness
84	33.4 Conditions at the point of delivery
85	33.5 Protection of personnel
86	33.6 Thermal efficiency 33.7 Insulation against freezing 33.8 Protection against surface condensation
87	Figure 1 — Typical thermal conductivity values for insulating materials used at above and below ambient temp…
88	Figure 2 — Typical contraction/expansion joints for insulated pipework (for use at 5 °C or colder)
89	Figure 3 — Linear thermal movement of various materials between temperatures of +20 °C and –100 °C
90	Figure 4 — Typical compression/support joint (for use at 5 °C or colder)
91	Figure 5 — Typical cleading and/or insulation support for vertical pipework — Spacing of joints (hot insulat…
92	Figure 6 — Typical cleading and/or insulation support for vertical pipework — Support arrangements (hot insu…
93	Figure 7 — Typical methods of insulating vertical vessels
94	Figure 8 — Typical methods of insulating horizontal vessels
95	Figure 9a — Typical insulation supports for vessels
96	Figure 9b — Typical insulation supports for vessels
97	Figure 10 — Method of supporting cleading
98	Figure 11 — Saturation vapour pressure against temperature over ice
99	Figure 12 — Vapour barriers — Maximum values for water vapour permeance
100	Figure 13 — Typical hanger in direct contact with pipe (not for pipes operating below ambient temperature)
101	Figure 14 — Typical hanger incorporating load-bearing insulation (for pipes operating above or below ambient …
102	Figure 15 — Typical roller support incorporating load-bearing insulation (for pipes operating above or below …
103	Figure 16 — Typical support for circular ducting incorporating load-bearing insulation (for pipes operating a…
104	Figure 17 — Typical support for rectangular ducting incorporating load-bearing insulation (for pipes operatin…
105	Figure 18 — Typical method for insulating vessels with conical bottoms
106	Figure 19 — Typical proprietary support inserts
107	Figure 20 — Typical arrangement showing termination of insulation adjacent to the tank bottom
108	Figure 21 — Typical arrangement showing termination of insulation adjacent to the tank roof
109	Figure 22 — Typical method of staggering insulation sections on a straight pipe (applies where pipe sections …
110	Figure 23 — Typical method of insulating a valve where metal cladding is not required
111	Figure 24 — Typical method of insulating branches of vessel for cold work showing layered junction
112	Figure 25 — Typical valve box
113	Figure 26 — Typical flange box
114	Figure 27 — Typical method of insulating manhole (cold work)
115	Figure 28 — Insulation of large valves using closed cell flexible insulants
117	Figure 29 — Typical method indicating the extent of insulation on vessel skirt
118	Figure 30 — Typical method of insulating expansion bellows Figure 31 — Typical method of insulating flexible pipe
119	Figure 32 — Typical method of insulating steam traced pipe
120	Figure 33 — Detail of inverted collar at manhole
121	Figure 34 — Insulated support plate for metal cleading — 150 mm square
122	Figure 35 — Typical joints in sheet metal
123	Figure 36 — Typical expansion joint between hot vessel and self-setting cement covering

Additional information

Status	Withdrawn
Title	Code of practice for thermal insulation of pipework and equipment in the temperature range of -100°C to +870°C
Replaces	BS 5970:1992
Publisher	BSI
Committee	B/540/7
Pages	126
Publication Date	2001-12-21
Withdrawn Date	2012-09-30
Replaced By	BS 5970:2012
ISBN	0 580 33318 3
Standard Number	BS 5970:2001
Descriptors	Pipework systems, Pipes, Thermal insulation, Thermal insulating materials, Temperature
ICS Codes	91.100.60 - Thermal and sound insulating materials

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BS 5970:2001

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