BUILDING STEEL STRUCURE PROTECTIVE METHOD AND COLOR CODE

Table of Contents

1.      SCOPE 3

2.      standard 3

3.      scope of application 3

4.      PAINTING scheme.. 4

5.      shop PAINTING and field painting.. 4

6.      PAINTING  application.. 5

This document is written for the purpose of receiving approval about Building steel members protective method and color code to the Client. Details are not included in this document, must comply with the terms of the structural specification. (SUT1-Z05-C01-4-001)

1.         SCOPE

All structural steel members are required corrosion protection and some areas are required fire protection.

The color code and painting specification defines the Architectural steel members final finish color for EfW (Energy-from-Waste) @ Sakra.

        The list of components in this color code may not be identical with the scope of supply.

2.           STANDARDS

Protective woks for Building Structural steelwork as Refer to structural specification

The standards color code is based on the following standards:.

RAL 840-HR and RAL-GL

3.           SCOPE OF APPLICATION

3.1    Corrosion Resistant Metallic Surfaces

If Stainless Steel, Aluminum, Hot Dip Galvanized or other corrosion resistant surface not to

be painted then this color code does not apply. If the specific steel member dose require to aesthetic reason, such surfaces to be painted then this color code shall be applied.

  

         The color code does not define whether a surface is it painted.

It defines the color of final paint provided the surface is to be painted.

3.2    Surfaces not to be painted

Unless otherwise specified the following surfaces shall not be painted and shall be protected

from accidental coating during painting of adjacent ferrous surfaces.

(a)      Plastic, rubber, aluminum, stainless steel, high alloy steel and non-ferrous

                        Material.

(b)       Galvanized structures and items. (IF Required, Refer to structural specification)

(c)       Surfaces of steel structures embedded or in contact with concrete or mortar,

(d)       Friction surfaces to be connected with high tensile strength bolts.

(e)    Pins and rollers Contact parts and cutting part.

(f)    Weld zone on site.

4.           PAINTING SCHEME

4.1    General Requirements

4.1.1 The storage, mixing and application of the paints shall be carried out strictly in

accordance to fulfilling the requirements of this specification.

4.1.2 The thinner of all coatings shall only be carried out when absolutely necessary, and

then only in accordance with the paint manufacturer’s instructions.

4.1.3 The painted surfaces shall be allowed to dry and cure in accordance with the paint

manufacturer’s recommendation and this specification. All coatings shall be used within the manufacturer’s ‘Open Pot Life’ period and the required drying time between coats allowed in all cases. Under no circumstances shall the ‘Pot Life’ be extended by the addition of new paint or other media.

4.1.4 Inadequate dry film thickness will necessitate the application of a further coat/s of

Paint to provide the full minimum dry film thickness specified

4.1.5 Aluminum paint shall not be applied to any steel or Iron surface.

4.2    Painting System

4.2.1 Painting systems shall be listed in the attached Table I " Protective method for

Building Steel Structure".

4.2.2  In case painting system in attached Table I is not applicable due to special

environment, the same to be taken up with CUSTOMER.

4.3    Final Finish Color

Final coat color shall be visually checked in accordance with attached Table II "Final

Finish Colour". The color shall be determined in accordance with Munsell No, Ral No.

BS No. etc.

5.           SHOP PAINTING AND FIELD PAINTING

5.1    Shop Painting

Ensure all of the Works comply with the relevant requirements of the Standards and Codes listed below or referenced in the body of the Civil & Structural Specification.

5.1.1  In case painting system in the attached appendix 1 Table I and appendix 2 Table II

cannot be applied because of a special type, catalogue products or any other reason, CONTRACTOR's practice is to be applicable subject to prior written approval.

5.1.2     The following surfaces shall be painted with anti-corrosive paint in CONTRACTOR's shop for corrosion protection during transportation and storage.

5.1.3      Paints to be used shall be obtained only from approved paint manufacturers as per list of vendors for the project. the technical data to show equal or superior quality shall also be provided by CONTRACTOR for Client’s approval prior to painting.

5.2    Field Painting

5.2.1     In case the area more than 10% painted up to primer coating by CONTRACTOR is damaged during handling of Steel Structure, all of the area painted shall be cleaned by the original preparation method whichever is applicable and will be re-primer-coated prior to installation.

5.2.2     For the galvanized surface, in case the damaged is less than 10%, the surface shall be prepared "Near White" by power tool and inorganic zinc-rich primer shall be applied for repairing. If the damaged area is above 10%, the whole item shall be re-galvanized.

5.2.3     Unless otherwise specified steel structures shall be painted up to finish coats or full coats with due surface preparation in accordance with the attached Table I and II.

5.2.4     When field touch-up painting with surface preparation is required, "adequate" cleaning by power tool shall be applied.

5.2.5     Brush or roller method shall normally be applied to field painting and airless spray method in special case.

5.2.6     CONTRACTOR shall fully protect all surfaces from damage and contamination, and shall provide the necessary protection from dust, paint droppings, paint mist, other contaminants during the execution of painting work. Especially, the particular care to protect all stainless steel surfaces from zinc paint must be exercised.

5.2.7     In case of defective painting and non-conformance to this specification, CONTRACTOR shall be responsible to repaint.

6.           PAINTING APPLICATION

6.1    Surface Preparation

6.1.1     The following works shall be carried out prior to surface preparation.

(1)         Removal of slag, fluxes and splatters adhered to weld area and steel surface;

(2) Removal of grease and machine oil with cleaning solvent, etc. Prior to solvent cleaning, soil, cement, spatters, salts or may other foreign matter shall be removed by scrapping or wire brushing.

(3)  Removal of excessive rust and dirt.

6.1.2     Minimum requirement of surface preparation for each painting system, are shown in the Appendix 1 Table I and Appendix 2 Table II attached.

6.1.3     After completion of surface preparation, surfaces to be painted shall be kept to prevent the adherence of detrimental foreign matters until starting of painting work.

6.1.4     Contractor shall carry out abrasive blasting work in a protected area with necessary facilities to prevent carrying-over of abrasive blasting material to the other area.

6.2    Painting Procedure

6.2.1     Paint material shall be thoroughly mixed immediately prior to application. Mixing shall be made by means of mechanical stirrers, paddle mixers, can vibrators or can shakers. All coating material shall be mixed by solvent proof mechanical stirrer for a sufficient time in order for proper mixing of one or two packs paint and bring the material to a uniform consistency. Sticks shall not be used.

6.2.2     The first layer of the primer shall be applied immediately after completion of surface preparation in order to avoid the occurrence of rust. When rusting occurs after completion of surface preparation and before painting, CONTRACTOR shall be responsible to re-do the work.

6.2.3     No painting operation shall be done without main contractor’s prior approval in the following weather conditions at the working area:

(1) When rain, fog or mist;

(2) When weather is expected to become adverse before painting has been dried;

(3) When dust effects adversely due to strong wind;

(4) When ambient temperature is 5° C or below;

(5) When relative humidity is 85% or more;

(6) When surface temperature to be painted is high and defects like air bubbles is expected to appear in the paint film;

(7) At night times;

(8) When steel temperature is not 3°C above dew point.

6.2.4     Prior to fabrication or installation, painting shall be applied to parts, which are not accessible after fabrication or installation.

6.2.5     In case of multi-component type paint, blending ratio, method and pot life time shall be observed strictly to manufacturer's specification.

6.2.6     Each coat shall be painted in the order of the specified type of paints. Subsequent coat shall be painted after checking the dryness and film thickness of previous coat. All defects shall be repaired before next coat is applied. It is recommended to use different color shades for each primer, mid/intermediate coat. Final finish coat shall however be as per Appendix 1 Table I.

6.2.7     Painting work shall be carefully done and a stripe coat shall be applied at all edges, corners, crevices, rivets, bolts and nuts, welds and other complex shapes.

6.2.8                In the following cases, painting shall be repaired:

(1)   When find detrimental film such as loose, crack, brittle or non adherent film or discoloration.

(2)   If the painting thickness is thinner than the thickness of minimum dry film, extra painting work is needed to meet more than thickness of minimum dry film. The subsequent coat is performed after complete drying of surface.

(3)   The partial surface treatment and maintenance painting for Worn or damaged parts during transportation and construction are the responsibility of the field painting. Maintenance painting is used the same or similar one that we had already performed painting at the shop. When using a similar paint, the approval document of contractor must be acquired.

Appendix 1 Table I: Protective method for Building Steel Structure

ITEM	CLASSIFICATION	NO.	PRIMER/PAINT ETC.	NO.OF COAT	AVERAGE THICKNESS	METHOD OF APPPLICATION (B-Brush, R-Roller, A-Airless Spray)
1. Main Building    Column, Beam and Bracing	Internal	1st	a) ZINC Silicate primer	1At shop	25 μ	B.R.A
		1st	b) Epoxy Primer	1At shop	40 μ	B.R.A (Touch Up)
		2nd	c) High Build Epoxy Coating reinforced with micaceous iron oxide	1At shop	125 μ	A
		3rd	d) Polyurethane Finish	1At shop	50 μ	A
2. Main Building    Column, Beam	External	1st	a) ZINC Silicate primer	1At shop	25 μ	B.R.A
		1st	b) Epoxy Primer	1At shop	40 μ	B.R.A (Touch Up)
		2nd	c) High Build Epoxy Coating reinforced with micaceous iron oxide	1At shop	125 μ	A
		3rd	d) Polyurethane Finish	2 At shop	2 X 50 μ	A
3. Transformer Room Steel Column	Internal	1st	a) ZINC Silicate primer	1At shop	25 μ	B.R.A
		1st	b) Epoxy Primer	1At shop	40 μ	B.R.A (Touch Up)
		2nd	c) High Build Epoxy Coating reinforced with micaceous iron oxide	1At shop	125 μ	A
		3rd	d) Polyurethane Finish	1At shop	50 μ	A
5. Steel Structure Fire protection	Internal	1st	ZINC Silicate primer	1At shop	25 μ	B.R.A
	Apply part of Vermiculite Fireproofing Spray or Both side covered with 2hr Fire Rate Board only.

    

Appendix 2 Table Ⅱ: Final finish colour.

Sr.	Service	Color	RAL NO./ BS 5252
1.	Main Building Steel Structure (Fire Protection)	White Aluminum (Vermiculite Spray)	9006
2.	Main Building Steel column & Beam	Grey White (Polyurethane Paint)	9002
3	Main Building Purlin & Transformer Room Beam and Purlin	White Aluminum (Hot dip galvanized Coating)	9006
4	Vermiculite Fireproofing Spray	Grey line	-
5	External Main Building Steel column & Beam	Separate Exterior color scheme rendering will be submitted for approval
6	Handrails (Non Stainless) and kick plates	Signal yellow w/   jet black	1003 / 9005
7	Unguarded edges of platforms and pits	Signal yellow	1003
8	Fire hose locations hydrants, pumps and sirens	Flame red	3000
9	Emergency stop bars, levers and buttons	Signal yellow	1003
10	Fire Exit Signs	Flame red	3000
11	Safety Showers, Eye wash fountains	Signal Green	6032