Chapter 27 Painting (Indian Railways Telecom Manual 2021) PDF

CHAPTER XXVII PAINTING 27.1 SECTION A- EQUIPMENT TO BE PAINTED Paint on equipment acts as a protective barrier between the equipment casing and the corrosive environment and it provides good aesthetic...

CHAPTER XXVII PAINTING 27.1 SECTION A- EQUIPMENT TO BE PAINTED Paint on equipment acts as a protective barrier between the equipment casing and the corrosive environment and it provides good aesthetics and ensures its long life. Normally the equipment should be procured with life-long painting which is achieved through modern painting techniques like Powder Coating etc. However in case it requires to be repainted, the same needs to be done before damage to the equipment (casing) takes place. 27.1.1 Items of equipment requiring painting (a) The following are the main items of telecommunication equipment that need regular painting: i. Antenna towers. ii. Emergency telephone socket posts and socket box. iii. Marking on OHE masts for the position of telecommunication cable joints. ( Normally Electrical department provides marking on OHE masts for the position of Emergency Socket post where available) iv. Battery stands. v. Telephone stands. vi. Train control telephone apparatus. vii. Modem stands. viii. Outdoor telecom items made of metallic case exposed to rains and direct heat. ix. Cable route marker x. Poles & Boards of passenger amenities boards (b) The following are the main items of telecommunication equipment that need occasional painting.  Control room equipment.  Way station control equipment.  Equipment racks and ladders 27.1.2 Colouring scheme (a) All wood work shall be finished with natural colour varnish. (b) As far as possible the original colour scheme adopted by the manufacturers may be followed in repainting. Where the same colours are not available, the repainting must be done with paints having colours near about the original. (c) Emergency telephone socket posts shall be painted with alternatively black and white paints for 15 cms length each. (d) Marking on OHE masts for the position of telecommunication cable joints and Emergency Socket post where available is to be of red paint. Indian Railways Telecom Manual - 2021 Page 360 27.1.3 Interval of painting: (a) The general principle for fixing intervals has been based on the following: (i) All wood work is polished once in 2 years. (ii) All outdoor equipment painted once in 3 years. (iii) All indoor equipment is painted once in 4 years. (b) The paintings on the emergency telephone socket posts and on OHE masts for cable joints and emergency socket where available shall be done once in a year (c) The above intervals may be suitably modified for any particular area after taking into account the corrosive effect of atmosphere and weather conditions. 27.1.4 Painting programme (a) Each SSE/JE shall be responsible to see that the telecommunication equipment under his charge is duly painted and clean. (b) Each SSE/JE shall draw out a schedule of painting for all the equipment under his charge. The quantities required shall be worked out on the basis of scale of paints to be fixed by the Sr.DSTE and work to be executed by an outsourcing agency. 27.1.5 Painting register – Each SSE/JE must maintain a painting register, one page or more being allotted to each equipment on his section. Record of the painting work done with dates of commencing and completing the work must be regularly entered in this register. 27.1.6 Inspection (a) Each SSE/JE must see that the outsourced painters are making satisfactory progress and that the painting work is in accordance with the instructions. (b) Each SrDSTE shall see that the painting programme is strictly adhered to and that it is completed in due time. He shall, during the course of his inspection, also see that all the equipment and apparatus is kept properly painted in accordance with the instructions. 27.2 SECTION B- GENERAL INSTRUCTIONS 27.2.1 Precautions Paints shall be stored in a cool dry place away from flame or naked light. All containers should be kept securely closed when not in use to avoid loss of material due to skinning and contamination. Paints, especially quick drying paints, shall not be left open to the atmosphere. 27.2.2 Mixing of paints Indian Railways Telecom Manual - 2021 Page 361  Paints from pigments and pastes must be prepared in accordance with standard specifications. Linseed oil turpentine shall not be added to ready mixed paints. Mixing of kerosene with paints is forbidden. 27.2.3 Painting of steel works (a) The surface of metal should be clean and free from dirt, scale, deteriorated old paint and rust and should be preferably dry before application of paint. Painting should be done preferably during dry weather. (b) For a new steel work, 3 coats of paints shall be applied. After the first two coats of an approved primer, the third paint of the specific colour and quality shall be applied. When repainting a structure, if the old paint does not show any signs of blistering, scaling or cracking, it need not be scraped off. It may be used as a foundation for the new coat. (c) When there are patches of blistering, scaling or cracking, these patches should be cleaned down to the steel and treated in a manner as recommended for a new structure. (d) The surface of metal should be cleaned by scrapping, chipping or scrubbing with brickbats. No chemical of any kind must be used. Old paint may be burnt, if necessary, and then scrapped off. (e) Paint should be applied with brushes and spread evenly, smoothly and as thin as possible. Rags or waste cotton should not be used for the application of paint. (f) Brushes should be thoroughly cleaned in proper driers after use. 27.3 SECTION -C PAINTING OF TELECOM TOWERS (a) Telecom Towers are to be painted as per requirement of Civil Aviation Regulations. Normally every telecommunication tower shall be painted with international orange and international white colors alternatively each with 5 meter band, starting with international orange at the top. (b) Repainting of Towers should preferably be done every five years or earlier depending on the conditions of the towers and climatic condition of the place. Before repainting work is undertaken, previous paint is to be scrapped taking care that galvanization of the members does not get affected. (c) In case telecom towers in the Railway Boundary are leased / used to any PSU/other agency, SSE/Telecom of section shall monitor the timely painting of the tower through such agencies. Any Deficiency noticed shall be conveyed to concerned agencies with information to Sr.DSTE for ensuring timely corrective action by such agencies. -x-x-x- Indian Railways Telecom Manual - 2021 Page 362