Firesteel 47-4 and 47-4 EXT Product Data Sheet No. 375

Transcription

1 TM Firesteel 47-4 and 47-4 EXT Product Data Sheet No. 375 The Ultimate Water Based Coatings for Structural Steel Protection Features: Internal and External Steel Protection 30 or 60 Minutes Fire Resistance Extremely Competitive Loadings Water Borne Fast Drying Times Under Typical Site Conditions No Top Seal for Internal Applications Single Coat Application For The Majority Of Steel Sizes

2 What is Firesteel? Firetherm Firesteel 47-4 and 47-4 EXT are water borne acrylic based thin-film intumescent coatings to provide 30 or 60 minutes fire protection to structural steel and cast iron. For internal applications, Firesteel 47-4 can be applied without the need for a top seal. Firesteel 47-4 EXT is a more durable coating that, with a suitable top seal, protects steels subjected to external weather elements. Firesteel 47-4 and 47-4 EXT Description Firesteel 47-4 and 47-4 EXT are water borne intumescent coatings applied by brush, roller or spray to provide either 30 or 60 minutes fire protection to structural steels. Firesteel is environmentally friendly, halogen and solvent free with no noticeable odour. Firesteel 47-4 and 47-4 EXT dry exceptionally quickly and this, combined with a capability to tolerate high build coating without it sagging, makes it particularly suitable for fast track construction. How it Works Products are Intumescents, which in the presence of heat expand several times its original volume to form an insulating char. The expanded coating forms a thick durable layer that insulates structural steel from the heat of even the most severe fire and its associated turbulent air currents. Loadings and Quantity Like all fire protection to structural steel, the thickness of product applied the loading varies depending upon the period of fire resistance required and the Hp/A value of the steel member involved. The Hp/A value can be quickly obtained from Firetherm s Technical Manual that also includes the surface area per metre of most common steel sizes to help in estimating the quantity of coating required. Refer to loading tables (page 4) for actual paint thickness and coverage. Briefly, the HP/A value of a steel member is an expression of its ability to absorb heat. The larger its surface area as a ratio of its mass, the quicker heat will be absorbed and the greater the HP/A factor. LOW SURFACE AREA LOW Hp/A HIGH SURFACE AREA HIGH Hp/A Firetherm can, upon request, supply Firesteel SpeedCalc, a Windows based programme for calculation of loadings and quantities required. EXPANSION SUBSTRATE All products have been independently fire resistance tested by Warrington Fire in accordance with the requirements of BS476 Pt Fire resistance to structural steel. Page - 2 -

3 Firesteel Application Instructions 1 Before commencing work, please read Firesteel Health & Safety notes see page Application Conditions Firesteel is a water-borne product but despite this, it has a very high tolerance of adverse site conditions. It is fast to dry even in low air movement conditions. Air movement will speed up the drying times. Coated surfaces must be protected from exposure to water. Ensure that the minimum temperature at the time of application is at least 5 C on a rising thermometer with an RH of 80% or lower. Steel temperature should be at least 3 C above dew point. Check the steel by touch to see if there is any condensation or water on it. If there is - stop and wait for the steel to warm up. 3 Steel Preparation All steel should be blast cleaned to SA2 1/2 in accordance with BS7079 Part A1 and primed with a suitable primer. A very wide range of commonly used single pack and two pack primers have been tested under Firesteel 47-4 and 47-4 EXT. Contact Firetherm's Technical Department ( ) if unsure. Bituminous and chlorinated rubber primers are unsuitable because of their poor performance in fire conditions. Zinc rich primers will need a tie coat before application. Check the over-coating times on epoxy primers by referring to the steel fabricators. If primer is found to be over-cured, under-cured or cured at temperature extremes beyond manufactures specification, contact manufacturer for advice. When incorrectly cured, epoxy primers have excess gloss patches, light abrasion is required in order to improve mechanical/chemical adhesion of the intumescent. 4 Application Firesteel may be applied by brush, roller or spray. Do not dilute. Stir well before use as this will slightly loosen the product. When applied by brush, the finish will have pronounced brush marks which would be acceptable if the area were at high level, or unlikely to be seen. Rolling will leave an even texture which may be more acceptable and spraying will leave a smooth even finish which is highly decorative. Firesteel has been developed to provide an excellent finish with a minimum of operator input. Maximum Wet application per coat: By brush 0.5mm (500 microns) = 0.36mm dry film thickness. By spray 1.4mm (1400 microns) = 1.008mm dry film thickness. 5 Spray Specification Firetherm recommends an airless spray system such as a Graco King 56:1 pressure ratio. However, other systems may be suitable such as airless electrical or petrol powered machines for example a Graco Ultra 1595, Graco GM5900 or Graco GM The following are general recommendations for spray equipment and may vary dependent on site conditions: Hose Diameter: 10 mm (3/8") Max hose length: 30m Fan angle: degrees Tip Size: thou Operating pressure: 3000 psi min. Filter size: 30 mesh 6 Monitoring Wet Film Thickness Firetherm provides a wet film gauge to monitor paint thickness during application. Press the teeth of the gauge into the wet paint, holding the gauge at right angles to the surface. The last wet tooth denotes the wet film thickness in microns. Keep the gauge clean and do not let paint dry on it. 7 Measuring Dry Film Thickness Ensure the surface to be measured is hard dry. Check by trying to make an impression in the paint film. Use a magnetic gauge such as an Elcometer "Banana Gauge" or an electronic instrument. Subtract primer film thickness from reading and topseal if used. Firetherm can provide this service if required for a nominal charge. 8 Drying Time In still air conditions the following drying times can be achieved with an RH of 70%. 500 Microns Wet Touch Dry Re-Coatable Film / Handleable 10 C 6 hours 16 hours 20 C 4 hours 8 hours 25 C 3 hours 4 hours 1000 Microns Wet Touch Dry Re-Coatable/ Film /Handleable 10 C 12 hours 24 hours 20 C 4-6 hours 12 hours 25 C 4 hours 8 hours Please note: The above are for guidance only, other factors will have effects. Air movement will considerably improve the above performance. 9 Top Seal Firetherm offers a range of top seals in gloss or semi-gloss available in colours from BS4800 and RAL 250Hr ranges. These top seals are ideal for unheated areas, aggressive environments or external situations. Page - 3 -

4 30 Minutes 3-sided beam Minutes 4-sided beam & column Firesteel 47-4 and 47-4 EXT Loading Tables 30 Minutes hollow sections , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Minutes 3-sided beam Minutes 4 sided beam & column * * 4 sided beam limited at 230 HP/A 60 Minutes Hollow Section Page - 4 -

5 Primer Compatibility Firesteel is applied to clean, dry, primed steels. Extensive primer compatibility tests have been undertaken on single and two pack products commercially available. Please contact Firetherm Technical Department for compatibility of applied primer with Firesteel. Top Seals Firesteel 47-4 does not require over-coating, however where a finish colour has been specified or in situations of harsher environments Firetherm will supply a top seal in a range of colours. For external steels, Firesteel 47-4 EXT requires a special top seal which protects the steel from exposed weather conditions. Firetherm will supply a top seal in a range of colours. Contract Support All Firetherm Products are supported on site by Fire Engineers who are experienced in the areas of Fire Engineering, paint application and post application inspection. Please contact Firetherm Technical Department for further information. Product Data Approvals BS476 Pt. 21:1987 Fire resistance to structural steel at Warrington Fire. Application Method Roller, brush or airless spray - typically a Graco King 56:1 pressure ratio with 21 thou tip. Colour Off-white Flash Point Not applicable % Solids /Specific Gravity Product Solids Specific Gravity Firesteel % 1.38 Firesteel 47-4 EXT 72% VOC 29 gm/litre Packaging Firesteel 47-4 and 47-4 EXT are single pack products supplied in 5 and 20 litre tubs. It can be supplied in 200 litre drums for larger projects or export. Shelf life 6 months. Certification Firesteel 47-4 and 47-4 EXT have been fully tested to BS476: Part 21:1987 fire resistance to structural steel at Warrington Fire. Fire Test references: WF149203, , WFRC Specification Wording Apply Firesteel (47-4, 47-4 EXT) onto suitably primed steelwork at a loading to achieve (30, 60 minutes) fire protection strictly in accordance with Firetherm s application instructions. Page - 5 -

6 Product Safety Data Notes Firesteel 47-4 / 47-4 EXT 1) IDENTIFICATION OF PRODUCT AND MANUFACTURER Product: Firesteel 47-4 and 47-4 EXT Intumescent Coatings are an aqueous acrylic based emulsion with inert fillers to provide fire protection to steel. No component labelled as dangerous under EEC directives criteria. Company: Firetherm, Unit F, Acorn Industrial Park, Crayford Road, Crayford Kent DA1 4FT, England. Tel: +44 (0) ) COMPOSITION: HAZARDOUS INGREDIENTS Non-hazardous: Prolonged exposure to the product may produce minor skin irritation. 3) HAZARD IDENTIFICATION Prime Hazards: None. 4) FIRST AID MEASURES Eye contact: Flush with copious quantities of fresh water for 15 minutes. Skin contact: Discard contaminated clothing. Wash skin with soap and water. Inhalation: May cause irritation. Remove patient to fresh air. Ingestion: Ingestion of small quantities of Firesteel 47-4 or 47-4 EXT is unlikely to cause significant reaction. Do not induce vomiting because of the risk of fluid entering the lungs. Wash out mouth and give plenty of water to drink. Seek medical attention. 5) FIRE FIGHTING MEASURES Firesteel 47-4 and 47-4 EXT are non-flammable but packaging can burn. Suitable extinguishing media: Water spray, dry powder, foam and carbon dioxide. Unsuitable Extinguishing media: None Special exposure hazards: None 6) LEAK AND SPILL PROCEDURE If dry, dispose of as non hazardous waste. If wet, absorb with sand, earth or non-flammable absorbent material and dispose of after curing as non hazardous waste. Method of clean up: Take up mechanically. 7) HANDLING AND STORAGE Do not eat or drink during use. Observe good industrial hygiene. Store for short periods on work site in unopened containers between 5 C and 25 C clear of the ground. 8) PERSONAL PROTECTION & EXPOSURE CONTROLS Rubber gloves, a light dust mask and goggles should be worn. 9) PHYSICAL DATA Appearance: Off-white liquid. Odour: None Ph: 8.5 Specific gravity Firesteel 47-4: 1.38 at 20 C Specific gravity Firesteel 47-4EXT: at 20 C Solubility: Miscible with water. 10) STABILITY & REACTIVITY DATA Chemically stable Not reactive with other substances. Shelf life 6 months stored internally between 5 C and 25 C. 11) TOXICOLOGICAL No data. There are no hazardous components. 12) ECOLOGICAL INFORMATION Do not allow to enter drains because of the danger of blockage. Otherwise non hazardous. 13) WASTE DISPOSAL Dispose of as general waste at an approved waste site suitable for building waste, observing local regulations. 14) TRANSPORT INFORMATION Not classified as hazardous. CHIP 3 not applicable. 15) REGULATORY INFORMATION Non-hazardous. 16) OTHER INFORMATION To be used as a protective coating against fire attack to structural steel. Conforms to EEC Directive 91/155/EEC and 93/112/EC. TM Page - 6 -