Pipeline Protection System -
Coal Tar Enamel:
Coal Tar Based Pipeline Coating
Coal Tar based thermoplastic polymeric coating produced from the
plasticization of coal tar pitch, coal and its distillates, followed
by the addition of inert fillers. This proven system provides
anti-corrosion protection to underground and off-shore MS pipelines.
It conforms to National and International Standards viz. IS-10221,
AWWAC-203 & BS-4164.
Primer: All Season
Chlorinate based synthetic primer modified and adjusted with
plasticizers and stabilizers in a blend of special solvents. It is
compatible with the Coal Tar Enamel being produced by RTP. It is
free flowing, fast drying and provides excellent bonding with the
metallic surface and the coating.
It conforms to National and International Standards viz. IS-10221,
AWWAC-203 & BS-4164 Standards.
Coal Tar Distillation Products -
Pitch is derived from the process of coal Tar at high temperature
using the latest technology under strict process and quality
control. The salient features are -
(a) Low Volatile content
(b) High fixed carbon
(c) Low ash content
(d) No mesophase
(e) Good wettability
(f) Good thermal stability during storage
Different Grade of Pitch -
1. Aluminum Grade Pitch - Used for the manufacture of pre-baked
and soderberg anodes.
2. Binder for Graphite Industry - Used as a binding agent for the
manufacture of high quality electrodes for electric arc furnace.
3. Special Pitches - Used as raw material for refractories, carbon
paste, paint, water proofing etc. Being manufactured to suit to
Napthalene Refined & Hot Pressed -
Recovered from coal tar and an improvement raw material for
intermediates of dyes and organic compound used in the chemical and
pharmaceutical process. It is used for the manufacture of Beta
Napthol, Phithalic Anhydride, Sulphonated Napthalene, Tanning
agents, Moth Balls and disinfectants for household use.
1. Light Creosote Oil - Used as solvents for paints, asphalt
2. Heavy Creosote Oil - Used for extraction of benzene from coke
oven gas and for manufacture of phenolic oil as disinfectant.
3. Anthracene Oil - Used as wood preservative oil, a feedstock for
the manufacture of carbon black and an important raw material for
the manufacture of coal tar enamel.
COAL TAR BASED PIPELINE COATING SYSTEM......
Product Data Sheet Coal Tar Enamel -
RTP Enamel is a thermoplastic polymeric coating produced from
plasticization of coal tar pitch, coal and its distillated followed
by addition of inert fillers. RTP Enamel is produced in accordance
with standards BS - 4164, AWWA C203 and IS-10221.
Salient Features -
® Permanent corrosion protection
® Resistance to soil bacteria and
® Low moisture absorption
® Good Electrical insulation
® Insolubility in hydrocarbon
® Excellent adhesion to metal
® Retention to form under soil
® Ease of application
® Good flexibility and temperature
® Resistance to Cathodic disbonding
® Inertness to soil chemicals
Application Methodology -
RTP enamel to be the broken into small pieces of approx. 2kgs and
loaded into the kettle. It is advisable to first melt the material
under slow firing till half the tank capacity and then to add new
material and start agitation periodically to avoid carbonization.
Enamel to be heated and maintained at application temperature.
Excessive heating to be avoided and it is very important to have a
temperature recorder fitted to the kettle which must be calibrated
time to time.
The maximum temperature of the enamel should never exceed 245C.
The left over material from the previous batch can be added to the
fresh material at the rate of 10% maximum per batch.
Material Consequent reuse of left out should not be avoided Enamel
should not be applied to primed pipe when metal temperature is below
7C and the pipe to be coated should be free from dust, dirt, oil and
® To be stored in clean
area to avoid contamination
® For bulk liquid storage the
temperature to be maintained from 180 C- 210 C.
Packaging and Shipping Information -
® Standard 250 kg MS
® Drums are marketed for easy
identification with grade and batch number.
® For overseas shipment, packed
drums loaded in containers or shipped as bulk cargo.
Health and Safety -
® Use of gloves and filler type
masks are recommended in the application area
® Eye protection glasses recommended
when enamel is applied in the event of contact wash eyes with cold
water and seek medical advice
® Cream to be applied to skin before
commencing work Ventillation must be adequate in area of application
® For fire protection use CO2 or dry
Product Data Sheet
RTP Primer - B is a chlorinated based synthetic primer, which is
modified and adjusted with plasticizers and a stabilizers in a blend
of special solvents. The all season RTP Primer - B is designed to
dry faster under all temperature conditions. Its quick drying
characteristic develops bond with RTP Enamel under most difficult
field conditions and permit pipe sections to be hot coat and rapped
eliminating primer contamination.
RTP Primer - B conforms to AWWA C203-2002 BS 4164/97 ISO -10221
All season primer and designed to dry faster under all temperature
Free flowing property permit coverage of 10-12 m2 per liter on new
pipe surface while old and rough pipe require 10% to 20% extra
coverage depending upon pipe surface.
It can be used for internal coating of pipes as it has no taste or
Application methodology -
Pipe Surface Preparation
Before applying RTP Primer - B, pipe surface prepration is of the
utmost importance. There are a number of suitable methods of pipe
cleaning including -
(a) Sand or grit blasting
(b) Mechanical scraping and wire brushing.
Each method has its own attractions.
Anhydrous Mudgun Mass
This mass is used in blast furnace for closing the blast furnace metal tap hole, it is used by the Mudgun Machine. This mass is supplied in cake shaped pieces, each weighing around 2 to 3 kgs approximately. lt is drilled in L to I & L/2 hr intervals. During drilling process it gives excellent tap hole length and is free from coke - rust. This mass can be used in every size/capacity of blast Furnaces. The special features of anhydrous Mudgun Mass are as follows:-
1. Adequate plasticity at room temp. there by allowing its application without prior heating.
2. Operation of Blast Furnace at a higher blast pressure ( 2 to SATM )
3. Low shrinkage and volume stability.
4. No drilling problem during Tap hole opening.
5. Excellent shelf life (4 weeks minimum )
6. Higher refractoriness.
7. Good resistance to material to oxidation and slag attack.
Hydrous Mudgun Mass
This mass is also used for closing the Tap hole of the blast furance . This is also used by the Mudgun Machine. It is supplied in coke shape in polythene packs. The mass is supplied in ready to use condition and no further processing is required bythe end user. During the drilling of tap hole of Blast Furnace, it is free from coke-rust and gives better tap hole length. The tap hole of the Blast Furnace is opened every 1 hr to 1 1/2% hr and then replenished periodically. The salient features are as given below:-
1. Taphole length achieved 1.6 to 2 mts consistently which increases the quality of hot metal per tap and hence productivity.
2. Full Mushroom is formed inside the furnace which results in turbulence free tapping and hot metal flow.
3. Good workability to facilitate extrusion.
4. Due to higher taphole length and mushroom formation, coke rust during tapping is avoided
5. Consistency coking out time to ensure adequate strength of extruded material.
6. Lower volatiles to minimize the flame and gas evolutions.
7. Better drillability which reduces opening time & avoids lancing
8. Good shelf of 3-4 weeks.
Anhydrous Trough Mass
This mass is used in main runner and side slag runner of the blast furnace. This is coarser powdered material of grain size 0 to 4 mm. This material gives enough strength after complete ramming and drying of the bed. This is a thermo sitting process, so computability increases after complete heating of the mabs. lt is suitable for various temperatures of liquid metal and its high quality ensures longer refractory life. This mass is supplied in ready to use condition and no further processing is required by the end user.
The salient features of the product are as follows:
1. Corrosion resistance from slag
2. Non-wettable to iron and slag
3. Thermal stability and shock resistance
4. Volume stability
5. Structural integrity