• There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

BS 5493:1977

Current
Current

The latest, up-to-date edition.

Code of practice for protective coating of iron and steel structures against corrosion
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-10-1977

Foreword
Code drafting committee
Section one. General
1. Scope
2. References
3. Use of the code
3.1 General
3.2 Use by the experienced specifier
3.3 Use by the non-technical specifier
3.4 Specification requirements
Section two. Factors influencing the choice of
protective systems
4. General
4.1 Recognition of the problems
4.2 Questions related to design, use and site
      requirements
4.3 Questions relating to coating system
5. Environment
5.1 Classification of types
5.2 Identification of relevant types
6. Life required of coating
6.1 Definition
6.2 Categories
6.3 Assessment of life requirement
7. Design of the structure
8. Fabrication
8.1 General
8.2 Faying surfaces of friction-grip joints
8.3 Fasteners
8.4 Procedure for welds
9. Facilities for application of coatings
10. Classification and characteristics of protective
    coatings
10.1 Classification
10.2 Characteristic advantages of metal and paint
      coatings
10.3 Other coatings
10.4 Application facilities
10.5 Effects of delays during application
10.6 Costs
11. Characteristics of metallic coatings
11.1 Zinc coatings (othern than zinc-rich paints)
11.2 Sprayed-metal coatings
11.3 Metal-plus-paint systems
12. Characteristics of paint systems (including metallic
    zinc-rich paints)
12.1 General
12.2 Zinc-rich paints
12.3 Drying-oil-type paints
12.4 One-pack chemical-resistant paints
12.5 Two-pack chemical-resistant paints
12.6 Bituminous coatings
13. Characteristics of some other protective systems
13.1 Powder coatings
13.2 Grease paints
13.3 Wrapping tapes and sleeves
13.4 Protection of steel by cement and allied products
13.5 Cathodic protection
14. Surface preparation
14.1 General
14.2 Degreasing
14.3 Removal of scale and rust
14.4 Attention to detail
Section three. Specifications and technical requirements
15. Introduction
15.1 The scope of this section
15.2 The need for specifications
15.3 The prime function of a Specification
15.4 Responsibilities in preparing a Specification
15.5 The communicative value of a Specification
15.6 Schedules
15.7 Details
15.8 Definition and allocation of responsibilities
16. Surface preparation
16.1 Degreasing
16.2 Removal of rust and scale
17. Coating system
18. Stripe coats
19. Control of thickness of paint coating
20. Control of thickness of metal coating
20.1 Galvanizing
20.2 Sprayed metal
21. Materials
21.1 Availability
21.2 Control of materials
21.3 Preparation for use
22. Application of protective coatings
22.1 General
22.2 Painting
22.3 Galvanizing and metal-spraying
22.4 Wrapping
22.5 Mastics and sealants
23. Working conditions
23.1 General
23.2 Temperature
23.3 Humidity
23.4 External conditions
23.5 Contamination of prepared surfaces and wet film
23.6 Shop conditions
23.7 Lighting
23.8 Hot conditions
23.9 Health and safety
24. Handling, transport, storage and erection
24.1 Selection of coating systems
24.2 Methods of preventing damage
24.3 Storage of coated steelwork
24.4 Responsibilities for preventing damage
25. Treatments for connections and other special areas
25.1 General requirements
25.2 Bolts
25.3 Surfaces of connections joined by bolts
25.4 Welded work
25.5 Clearance for coatings
26. Manhole and joint cover plates, pipe couplings and
    other small items
27. Machined and bearing surfaces
28. Steel in contact with other materials
28.1 Coating system
28.2 Steel embedded in concrete
28.3 Steel in contact with timber
28.4 Steel in contact with other metals
28.5 Steel in contact with or near rain-washed concrete
28.6 Steel near to surfaces subject to treatment with
      road (de-icing) salts
29. Surfaces inaccessible on completion
30. Ancillary equipment
31. Use of desiccants
32. Remedial work
32.1 General
32.2 Defects resulting from unsatisfactory application
32.3 Defects resulting from inferior preparation,
      materials or workmanship
32.4 Early degradation of coatings
32.5 Other remedial measures
33. Specifications for maintenance coatings
33.1 Factors for consideration
33.2 Compatibility of maintenance with original system
33.3 Location of different treatments
33.4 Coating schedule
34. Final check
Section four. Inspection
35. Introduction
36. Duties of the Inspector
37. Levels of inspection
38. Inspection schedule
39. Inspection record and reports
40. Inspection organization
41. Measurement of film thickness
41.1 Methods available
41.2 Procedure
41.3 Calculations
42. Sampling of materials
43. Inspection guide
Section five. Maintenance
44. The need for maintenance
45. Basic considerations of maintenance procedure
46. Factors affecting decisions on maintenance
46.1 Condition of coatings
46.2 Variability of deterioration according to location
46.3 Factors affecting deterioration
46.4 Type and use of structure
47. Factors affecting choice of procedure
47.1 Environment
47.2 Constraints on site
48. Organization
48.1 Labour
48.2 Inspection
48.3 Conduct of work on site
49. Choice of maintenance method
50. Choice of procedures
51. Surface preparation
51.1 General
51.2 Factors appropriate to use of different methods
      on site
52. Application
53. Standards of preparation
54. Standards of application
54.1 General
54.2 Brushing
54.3 Roller-coating
54.4 Spray application
55. Recommendations for coatings
55.1 General
55.2 Previously painted steelwork
55.3 Previously metal-coated steelwork with or without
      additional coating
Section six. Safety and health
56. Legislation
57. Operational hazards
58. General hygiene
Numerous appendices
Numerous tables
Numerous figures
Index

Guidance on how to specify a chosen protective system, how to ensure its correct application and how to maintain it. Does not include specific recommendations for ships, vehicles, offshore platforms, specialized chemical equipment, cladding materials, plastics coatings, cement-mortar linings or weathering steels.

This code classifies recommended methods of protection against corrosion of iron and steel structures exposed to environments commonly encountered. It describes the various methods in detail and gives guidance on how to specify a chosen protective system, how to ensure its correct application, and how it should be maintained.

The code does not include specific recommendations for ships, vehicles, offshore platforms, specialized chemical equipment, or cladding materials; nor does it include detailed recommendations for plastics coatings or cement-mortar linings.

For steel of 5mm thickness or less the recommendations of DD 24 may be preferred.

For some situations, weathering steel may be an alternative to ordinary structural steel with applied coatings. No detailed recommendations on the use of weathering steels are given in this code and when their use is contemplated, advice should be sought from the steel industry.

Committee
STI/21
DevelopmentNote
Supersedes 75/12246 DC (11/2003) Inactive for the new design. (10/2007) Reviewed and confirmed by BSI, February 2015. (01/2015)
DocumentType
Standard
Pages
124
PublisherName
British Standards Institution
Status
Current
SupersededBy
Supersedes

BS 8216:1991 Code of practice for use of sprayed lightweight mineral coatings used for thermal insulation and sound absorption in buildings
BS 873-7:1984 Road traffic signs and internally illuminated bollards Specification for posts and fittings
BS ISO 15686-1:2011 Buildings and constructed assets. Service life planning General principles and framework
BS 5395-3:1985 Stairs, ladders and walkways Code of practice for the design of industrial type stairs, permanent ladders and walkways
BS 6779-3:1994 Highway parapets for bridges and other structures Specification for vehicle containment parapets of combined metal and concrete construction
BS 8210:1986 Guide to building maintenance management
BS 5950-9:1994 STRUCTURAL USE OF STEELWORK IN BUILDING - PART 9: CODE OF PRACTICE FOR STRESSED SKIN DESIGN
14/30268442 DC : 0 BS 5930 - CODE OF PRACTICE FOR GROUND INVESTIGATIONS
BS 5395-1:1977 Stairs, ladders and walkways Code of practice for the design of straight stairs
BS 7195(1989) : 1989 GUIDE FOR PREVENTION OF CORROSION OF METALS CAUSED BY VAPOURS FROM ORGANIC MATERIALS
BS 5385-4:2009 Wall and floor tiling Design and installation of ceramic and mosaic tiling in special conditions. Code of practice
BS 5385-4:1992 Wall and floor tiling Code of practice for tiling and mosaics in specific conditions
BS 6150:1991 Code of practice for painting of buildings
BS 5930:2015+A1:2020 Code of practice for ground investigations
BS 8558:2015 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages. Complementary guidance to BS EN 806
BS 5930(1999) : 1999 CODE OF PRACTICE FOR SITE INVESTIGATIONS
BS 5385-4:2015 Wall and floor tiling Design and installation of ceramic and mosaic tiling in specific conditions. Code of practice
BS 1722-12:1999 Fences Specification for steel palisade fences
BS 4211:1994 Specification for ladders for permanent access to chimneys, other high structures, silos and bins
BS 1722-8:1997 Fences Specification for mild steel (low carbon steel) continuous bar fences and hurdles
BS 8202-1:1995 Coatings for fire protection of building elements Code of practice for the selection and installation of sprayed mineral coatings
BS 8000-12:1989 Workmanship on building sites Code of practice for decorative wallcoverings and painting
BS 6374-4:1984 Lining of equipment with polymeric materials for the process industries Specification for lining with cold curing thermosetting resins
BS 1722-13:1978 Fences Chain link fences for tennis court surrounds
02/107760 DC : DRAFT DEC 2002 BS 4211 - SPECIFICATION FOR PERMANENTLY FIXED LADDERS
BS 4479-1:1990 Design of articles that are to be coated General recommendations
BS 6751:1986 Guide for protection of machine tools intended for use in extreme environmental conditions
BS 7361-1:1991 Cathodic protection Code of practice for land and marine applications
BS 4479-7:1990 Design of articles that are to be coated Recommendations for thermally sprayed coatings
BS 6579-3:1988 Safety fences and barriers for highways Specification for components for tensioned rectangular hollow section beam (100 mm x 100 mm) safety fence
AWS C2.23M/C2.23 : 2003 SPECIFICATION FOR THE APPLICATION OF THERMAL SPRAY COATINGS (METALLIZING) OF ALUMINUM, ZINC, AND THEIR ALLOYS AND COMPOSITES FOR THE CORROSION PROTECTION OF STEEL
NACE 12/AWS C2.23M/SSPC CS- 23 : 2016 SPECIFICATION FOR THE APPLICATION OF THERMAL SPRAY COATINGS (METALLIZING) OF ALUMINUM, ZINC, AND THEIR ALLOYS AND COMPOSITES FOR THE CORROSION PROTECTION OF STEEL
NACE 12 : 2003 SPECIFICATION FOR THE APPLICATION OF THERMAL SPRAY COATINGS (METALLIZING) OF ALUMINUM, ZINC, AND THEIR ALLOYS AND COMPOSITES FOR THE CORROSION PROTECTION OF STEEL
BS 6651:1999 Code of practice for protection of structures against lightning
BS 5628-3:2001 Code of practice for use of masonry Materials and components, design and workmanship
BS 5306-2:1990 Fire extinguishing installations and equipment on premises Specification for sprinkler systems
BS 6949:1991 Specification for bitumen-based coatings for cold application excluding use in contact with potable water
BS 873-2:1984 Road traffic signs and internally illuminated bollards Specification for miscellaneous signs
BS 5950-5:1998 STRUCTURAL USE OF STEELWORK IN BUILDING - PART 5: CODE OF PRACTICE FOR DESIGN OF COLD FORMED THIN GAUGE SECTIONS
BS 4485-3:1988 Water cooling towers Code of practice for thermal and functional design
BS 6180:1999 Barriers in and about buildings. Code of practice
BS 6579-1:1988 Safety fences and barriers for highways Specification for components for tensioned corrugated beam safety fence on Z posts
BS 4975:1990 Specification for prestressed concrete pressure vessels for nuclear engineering
BS 5950-2:1992 Structural use of steelwork in building Specification for materials, fabrication and erection: hot-rolled sections
BS 4076:1989 Specification for steel chimneys
BS 6180:2011 Barriers in and about buildings. Code of practice
BS 5908:1990 Code of practice for fire precautions in the chemical and allied industries
BS 4508-1:1986 Thermally insulated underground pipelines Specification for steel cased systems with air gap
BS 4092-1:1996 Specification for domestic front entrance gates Specification for metal gates
BS 2594:1975 Specification for carbon steel welded horizontal cylindrical storage tanks
BS 3416:1991 Specification for bitumen-based coatings for cold application, suitable for use in contact with potable water
BS 6700:1997 Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages
BS 4008:1991 Specification for cattle grids
BS 6779-1:1998 Highway parapets for bridges and other structures Specification for vehicle containment parapets of metal construction
BS 4485-4:1996 Water cooling towers Code of practice for structural design and construction
BS 6767-1:1999 Transportable accommodation units Recommendations for design and construction of the basic unit
BS 6700(2006) : 2006 DESIGN, INSTALLATION, TESTING AND MAINTENANCE OF SERVICES SUPPLYING WATER FOR DOMESTIC USE WITHIN BUILDINGS AND THEIR CURTILAGES - SPECIFICATION
09/30172555 DC : 0 BS ISO 15686-1 REV - BUILDINGS AND CONSTRUCTED ASSETS - SERVICE LIFE PLANNING - PART 1: GENERAL PRINCIPLES AND FRAMEWORK
BS 6349-6:1989 Maritime structures Design of inshore moorings and floating structures
BS 8301:1985 Code of practice for building drainage
BS 6374-1:1985 Lining of equipment with polymeric materials for the process idustries. Specification for lining with sheet thermoplastics
BS 3632:1981 Specification for park homes (mobile homes)
BS 8002:1994 Code of practice for earth retaining structures
BS 6579-5:1986 Safety fences and barriers for highways Specification for open box beam safety fence (single height)
BS 8000-13:1989 Workmanship on building sites Code of practice for above ground drainage and sanitary appliances
15/30293166 DC : 0 BS 5385-4 - WALL AND FLOOR TILING - PART 4: DESIGN AND INSTALLATION OF CERAMIC AND MOSAIC TILING IN SPECIFIC CONDITIONS - CODE OF PRACTICE
BS 5400-9.2:1983 STEEL, CONCRETE AND COMPOSITE BRIDGES - BRIDGE BEARINGS - SPECIFICATION FOR MATERIALS, MANUFACTURE AND INSTALLATION OF BRIDGE BEARINGS
BS 3690-2:1989 Bitumens for building and civil engineering Specification for bitumens for industrial purposes
BS 466:1984 Specification for power driven overhead travelling cranes, semi-goliath and goliath cranes for general use
BS 1564:1975 Specification for pressed steel sectional rectangular tanks
11/30228295 DC : 0 BS 8558 - GUIDE TO THE DESIGN, INSTALLATION, TESTING, OPERATION AND MAINTENANCE OF SERVICES SUPPLYING WATER FOR DOMESTIC USE WITHIN BUILDINGS AND THEIR CURTILAGES - COMPLEMENTARY GUIDANCE TO BS EN 806
BS 6765-4:1987 Leisure accommodation vehicles. Caravans Specification for undergear
BS 5950-7:1992 STRUCTURAL USE OF STEELWORK IN BUILDING - SPECIFICATION FOR MATERIALS AND WORKMANSHIP: COLD FORMED SECTIONS
BS 6270-3:1991 Code of practice for cleaning and surface repair of buildings Metals (cleaning only)
05/30095368 DC : DRAFT FEB 2005 BS 6150 - PAINTING OF BUILDINGS - CODE OF PRACTICE
BS 6367:1983 Code of practice for drainage of roofs and paved areas
05/30131954 DC : DRAFT APR 2005 BS 5628-3 - CODE OF PRACTICE FOR THE USE OF MASONRY - PART 3: MATERIALS AND COMPONENTS, DESIGN AND WORKMANSHIP
07/30043552 DC : 0 BS 5385-4 - WALL AND FLOOR TILING - PART 4: DESIGN AND INSTALLATION OF CERAMIC AND MOSAIC TILING IN SPECIAL CONDITIONS - CODE OF PRACTICE
BS 1139-4:1982 Metal scaffolding Specification for prefabricated steel splitheads and trestles
BS 8558:2011 Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages. Complementary guidance to BS EN 806
DEFSTAN 05-39/1(1975) : 1975 SAFETY REQUIREMENTS FOR THE DESIGN, ERECTION AND MAINTENANCE OF LAND BASED MASTS, TOWERS, TURNTABLES, ANTENNA SUPPORTING, AND RELATED STRUCTURES
BS 6374-3:1984 Lining of equipment with polymeric materials for the process industries Specification for lining with stoved thermosetting resins
BS 5502-21:1990 Buildings and structures for agriculture Code of practice for selection and use of construction materials
BS 8200:1985 Code of practice for design of non-loadbearing external vertical enclosures of buildings
10/30212801 DC : 0 BS 6180 - BARRIERS IN AND ABOUT BUILDINGS - CODE OF PRACTICE
BS 8000-15:1990 Workmanship on building sites Code of practice for hot and cold water services (domestic scale)
BS 6180:1982 Code of practice for protective barriers in and about buildings
BS 7773:1995 Code of practice for cleaning and preparation of metal surfaces
I.S. 325-2:1995 CODE OF PRACTICE FOR USE OF MASONRY - PART 2: MASONRY CONSTRUCTION
BS 853(1990) : 1990 AMD 8979 SPECIFICATION FOR VESSELS FOR USE IN HEATING SYSTEMS - CALORIFIERS AND STORAGE VESSELS FOR CENTRAL HEATING AND HOT WATER SUPPLY
BS 853-1(1996) : 1996 SPECIFICATION FOR VESSELS FOR USE IN HEATING SYSTEMS - CALORIFIERS AND STORAGE VESSELS FOR CENTRAL HEATING AND HOT WATER SUPPLY
AWS TSS : 1985 THERMAL SPRAYING: PRACTICE, THEORY, AND APPLICATION
BS 8010-2.8:1992 Code of practice for pipelines. Pipelines on land: design, construction and installation Steel for oil and gas
15/30299694 DC : 0 BS 8558 - GUIDE TO THE DESIGN, INSTALLATION, TESTING AND MAINTENANCE OF SERVICES SUPPLYING WATER FOR DOMESTIC USE WITHIN BUILDINGS AND THEIR CURTILAGES - COMPLEMENTARY GUIDANCE TO BS EN 806
BS 6767-1:1992 Transportable accommodation units Recommendations for design and construction
BS 6374-2:1984 Lining of equipment with polymeric materials for the process industries Specification for lining with non-sheet applied thermoplastics
SSPC-CS 23.00 : 2016 SPECIFICATION FOR THE APPLICATION OF THERMAL SPRAY COATINGS (METALLIZING) OF ALUMINUM, ZINC, AND THEIR ALLOYS AND COMPOSITES FOR THE CORROSION PROTECTION OF STEEL
BS 7262:1990 Specification for automatic safe load indicators
BS 6579-4:1990 Safety fences and barriers for highways Specification for components for tensioned rectangular hollow section beam (200 mm x 100 mm) safety fence
BS 7021:1989 Code of practice for thermal insulation of roofs externally by means of sprayed rigid polyurethane (PUR) or polyisocyanurate (PIR) foam
ISO 15686-1:2011 Buildings and constructed assets — Service life planning — Part 1: General principles and framework
BS 6150(2006) : 2006 PAINTING OF BUILDINGS - CODE OF PRACTICE
BS 8081:1989 Code of practice for ground anchorages
BS 3632:1995 Specification for residential park homes
BS 3632:2005 Residential park homes. Specification
BS 5930:2015 Code of practice for ground investigations
BS 5950-4:1994 STRUCTURAL USE OF STEELWORK IN BUILDING - PART 4: CODE OF PRACTICE FOR DESIGN OF COMPOSITE SLABS WITH PROFILED STEEL SHEETING

BS 4921:1988 Specification for sherardized coatings on iron or steel
BS 1133-6(1966) : 1966 PACKAGING CODE - TEMPORARY PROTECTION OF METAL SURFACES AGAINST CORROSION (DURING TRANSPORT AND STORAGE)
BS 3382-1&2(1961) : 1961 SPECIFICATION FOR ELECTROPLATED COATINGS ON THREADED COMPONENTS - CADMIUM ON STEEL COMPONENTS - ZINC ON STEEL COMPONENTS
BS 3294-1:1960 Specification for the use of high strength friction grip bolts in structural steelwork. General grade bolts
BS 4164:2002 Specification for coal-tar-based hot-applied coating materials for protecting iron and steel, including a suitable primer
BS 7079-C2(1989) : 1989 AMD 8661 PREPARATION OF STEEL SUBSTRATES BEFORE APPLICATION OF PAINTS AND RELATED PRODUCTS - METHOD FOR THE GRADING OF SURFACE PROFILE OF ABRASIVELY BLAST CLEANED STEEL USING A COMPARATOR
BS 8110-3(1985) : 1985 STRUCTURAL USE OF CONCRETE - PART 3: DESIGN CHARTS FOR SINGLY REINFORCED BEAMS, DOUBLY REINFORCED BEAMS AND RECTANGULAR COLUMNS
BS 8110-2:1985 STRUCTURAL USE OF CONCRETE - PART 2: CODE OF PRACTICE FOR SPECIAL CIRCUMSTANCES
BS 2091:1969 Specification for respirators for protection against harmful dusts, gases and scheduled agricultural chemicals
BS 6150:1991 Code of practice for painting of buildings
BS 1706:1990 Method for specifying electroplated coatings of zinc and cadmium on iron and steel
BS 2569-2:1965 Specification for sprayed metal coatings Protection of iron and steel against corrosion and oxidation at elevated temperatures.
BS 4479:1969 Recommendations for the design of metal articles that are to be coated
BS 7298:1990 Schedule of requirements and recommendations for cards to be used in electronic funds transfer at point of sale (EFT-POS)
BS 5950-3.1(1990) : 1990 STRUCTURAL USE OF STEELWORK IN BUILDING - PART 3: DESIGN IN COMPOSITE CONSTRUCTION - SECTION 3.1: CODE OF PRACTICE FOR DESIGN OF SIMPLE AND CONTINUOUS COMPOSITE BEAMS
BS 2523:1966 Specification for lead-based priming paints
PD 6484:1979 Commentary on corrosion at bimetallic contacts and its alleviation
BS 2569-1:1964 Specification for sprayed metal coatings Protection of iron and steel by aluminium and zinc against atmospheric corrosion
BS 5228:1975 Code fpr practice for noise control on construction and demolition sites
BS 2451:1963 Specification for chilled iron shot and grit
BS 7079-C1(1989) : 1989 AMD 8652 PREPARATION OF STEEL SUBSTRATES BEFORE APPLICATION OF PAINTS AND RELATED PRODUCTS - SURFACE ROUGHNESS CHARACTERISTICS OF BLAST CLEANED STEEL SUBSTRATES - SPECIFICATION FOR SURFACE PROFILE COMPARATORS FOR THE ASSESSMENT OF ABRASIVE BLAST-CLEANED SURFACES
BS 3698:1964 Specification for calcium plumbate priming paints
BS 534:1990 Specification for steel pipes, joints and specials for water and sewage

View more information
£340.00
Excluding VAT

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.