Dripgrip Roof Fixing L Bolts
Use of polycoated roofing accessories is an established practice in India, now. But, correct use of these accessories to fight corrosion and leakage through J/L roofing hooks needs customer education.
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Incorrect pre-treatment : GALVANISING :
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When we supplied these hooks earlier, the pretreatment given was GALVANISING before polymer coating the bolts. But, it was quite an unfriendly & non-cohesive surface for polymer coating. More glazed the galvanising, worse it was for polymer coating. We learnt from the feed back by our numerous customers that this treatment of galvanising is hardly suitable for corrosion resistance in the longer run. For over two years, we conducted trials and produced a quasi-monolithic polymer coating. This coating gives enhanced peel off force and abrasion resistance and malleability to the coat. Movement of purlins due to wind pressures, though insignificant, causes rupture of coating exposing the mother surface, giving rise to corrosion. As pioneers, in polymer coated roofing accessories, we decided to give a perfect system& NOT a workable system.
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Patented Product :
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Now, we have successfully invented a better surface preparation than G.I. for effective polymer coating, without compromising on corrosion resistance as observed in G.I. As a result of our research, we have perfected a process of Zinc-Phosphating the bolts instead of Galvanising before Polymer coating. The process has Patent No. 204161 Dtd. 12/01/2007. Our many esteemed customers have conducted extensive and destructive trials on these bolts. In both cases the results are astonishing. The comparison of Zinc - Phosphated Polymer coated bolts and Galvanised Polymer coated bolts, is enclosed.
Destructive test can be taken on our Zinc, Phosphated bolt and GI Polymer coated bolt by using a small hammer and a razor blade. It reveals that on razor cutting, coating on our Zinc-Phosphated bolt CAN NOT be peeled off, whereas coating of G.I. bolt will EASILY BE PEELED OFF LIKE A BANANA SKIN. On hammering, the coating it is locally dented but the coating is not removed like G.I. coated bolt. Life of these ZnPh Polycoated bolts is enormously high to that of G.I. polycoated bolts.
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Universal NAGGING Problem :
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NAGGING problem of LEAKAGE is universal irrespective of geographical location and type of industry. To fight this problem, our DRIPGRIP accessories are made from Special Virgin Polymers added with special UV Stabilizers, to resist Ozone/Ultra violet effect and Temperature factors. Its performance conforms to ASTM E-179: 81.
DRIPGRIP accessories consist of Thrust Washer instead of G.I. Washer, Polymer Washer (for sealing), Polymer Cap with skirting covering G.I. nut. With this information, as customer education, wise choice is the right product DRIPGRIP for any roof work. Inclusion of this in standard specifications instead of mere Polymer coated bolts for roofing will give right value of this choice. Various Industrial Units & Consultants of worldwide repute have included in their New Standards. There is hardly anything in the world that A MAN cannot make a little worse and sell a little cheaper. Those who consider PRICE only are this man LAWFUL PREY.
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Type of Industries :
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Heavy use of corrosive chemicals :
like High Factories, Heat Treatment Shop, Fertilisers
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Petroleum & Petrochemicals :
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Ports & Ware housing Food storage & Sugar Ware houses
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Breweries & Sugar Industries
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Atomic Plants
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`DRIPGRIP J/L Bolt System
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This system will consist of
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a) Polymer Coated J/L Hook
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DRIPRIP Bolts
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b) G.I. Nut,
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c) Thrust Washer for G.I. Washer
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DRIPRIP Accessories
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d) Polymer Washer (for sealing)
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e) Polymer Cap
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DRIPRIP Accessories are used to avoid DRIPPING leakages
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- The Steel of the Bolt should conform to IS 1367 : 1985
- The Threads of the bolt should be “ROLLED and NOT CUT Threaded.
Bar Stock Dia. for 3/8 B.S.W. threading - 8.0 + 0.2 mm.
Bar Stock Dia. for 5/16 B.S.W. threading - 7.0 + 0.2 mm
- These Zinc-Phosphated bolts should conform to PATENT No. 204161 Dtd. 12/01/2007.
- The uncoated portion of the bolts should be treated with non-phenolic oil/s for effective corrosion resistance
- The uncoated portion of the bolts should be treated with non-phenolic oil/s for effective corrosion resistance
- Polymer accessories like, Washer, Thrust Washer & Cap should be made from properly blended Polymers to resist seasoning, hardening and cracking due to weather, Ultra Violet rays, Ozone effect etc
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A) DRIPRIP Polymer Coated Bolts - J/L Hooks
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The thread rolled, galvanised J/L bolts, after pretreatment, are coated with the Virgin Polymer, under a Special manufacturing process, developed by us, Thermo-Electro Fusion. The finished product is tested to ASTM B-117 modified test.
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The finished product conforms to following parameters :
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Coating Thickness
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0.5 mm min
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Temperature Resistivity
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60O C max
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Inert to
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Normal Acid & Alkaline fumes at 70O C. Salt Water, Sultry weather, at 95% R.H. at 35O C. Performance conforming to ASTM B-117, Modified Lab. Test). (Batch Tests, as per our Certificates.)
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Abrasion Resistance
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Suitable to resist Purlin movements due to Wind Pressure.
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Permisible Values
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| Abrasion Resistance : |
Weight Loss : 20 to 25 mg. / 100 gms.
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| Peel off Force |
2.5 to 3 Kg. / cm2 using 62.5 kgf beam
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a) Polymer Washer
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Made from Special Virgin Polymers
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b) Thrust Washer/Flat Washer, replacing G.I. washer
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resist External corossion, Ozone/Ultra
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c) Polymer Cap
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violet effect and Temperature factors
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Performance conforming to ASTM E-179: 81
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Representative list of major works where " DRIPRIP" J/L Bolt System is used extensively.
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Sr.No
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Name of the Project where our Order Placed by product is used
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Order Placed by
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1
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Indira Gandhi Air Port, Delhi
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Mittal & S.K.B.Builders E.I.L
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2
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Bongaigaon Refinery & Petro-chem Ltd
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Mechfab, Guwahati E.I.L
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3
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NALCO, Angul
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Bridge & Roof Co. Kolkata E.I.L
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4
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Indian Petro.Corpn.Ltd.,Dahej,Gujarat
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R.S.B. Project
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5
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Gujarat Alkalies & Chem.Dahej,Gujarat
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Atcon & Nila Bauart
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6
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Narmada Chem.Petro.Ltd.,Bharuch,Gujarat
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Navdeep & Bright Const
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7
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United Phosphorus Ltd.,Zagdia,Gujarat
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Ami Builders
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8
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G.S.F.C.Ltd. Baroda, Gujarat
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Direct by GSFC
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9
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Rama Newsprint & Paper, Surat, Gujarat
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Direct by Rama Paper
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10
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Reliance Ind.Ltd.,Surat, Gujarat
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Lloyds Insulations
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11
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Essar Steels Ltd.,Surat, Gujarat
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Jay Constructions
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12
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Atul Ltd., Valsad, Gujarat
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Direct by Atul
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13
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Hindustan Zinc Ltd.,Udaipur, Raj
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Arihant Const
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14
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Rama Phosphate, Udaipur, Raj
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Direct by Rama
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15
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Gajambuja Cement, Saurashtra
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Direct
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16
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Gajambuja Cement, Rasayani, Maharashtra
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Direct
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17
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Gajambuja Cement, Surat, Gujarat
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Direct
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18
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Excel Industries Ltd. Roha, Maharashtra
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Direct
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19
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Anshul Chemicals Ltd., Roha
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Direct
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20
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Godrej Apar Ltd., Shirwal, Maharashtra
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Rajmohan Roofings
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21
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South Asia Tyres, Aurangabad, Maharashtra
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Rajmohan Roofings Bhagwati Associates
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22
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EMCO Transformers, Thane, Maharashtra
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Direct
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23
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Morarji Legler, Nagpur, Maharashtra
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B.G.Shirke Bhagwati Associates
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24
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Premier Automobiles Ltd. Mumbai
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25
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L&T Glass Container, Sinner, Maharashtra
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L&T ECC, Mumbai
Bhagwati Associates
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26
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Nippon Denro Ispat, Wadkhal, Maharashtra
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L&T ECC, Mumbai
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27
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SPIC, Madras
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Altech, Madras
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28
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Madras Fertilizers Ltd., Madras
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L&T ECC, Madras
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29
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E.I.D.Parry, Karaikkal, Tamilnadu
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Direct
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30
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Tamilnadu News Print,Karur,Tamilnadu
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Direct
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31
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Seshasayee Paper, Erode, Tamilnadu
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Direct
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32
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DCW Ltd. Tuticorin, Tamilnadu
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Walters Engg.& M.Ramu
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33
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Guwahati Airport, Guwahati
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JG Enggrs.,Assam Govt.
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34
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Calicut Airport, Calicut
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DTM Const.
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35
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Indian Rare Earths, Chawra, Kerla
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Direct
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36
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Kerala Minerals & Metals,Chawra, Kerla
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Direct
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37
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Travancore Titanium, Trivandrum, Kerla
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Direct
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38
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Mysore Paper Mills, Bhadrawati, Kerla
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Direct
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39
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Jindal Vijainagar Steel,Torangallu
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Direct
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40
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HINDALCO Industries, Renukoot, A.P
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Direct
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41
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A.P.Rayons Ltd.,Kamalapuram, A.P.
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Direct
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42
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Grasim Industries Ltd., Nagda, M.P
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Direct
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