Adhesives - Nitobond EP, Nitotile, Fosroc Chemical Distributors

ShaliEnamel P / R

Coal Tar Enamel For Pipe Coating

Description

ShaliEnamel P / R (formerly known as Coal-tar Enamel Type 1 Plasticised Pitch) is coal tar based hot-pour pipe coating enamel coatings prepared by digesting bituminous coal in a solution of pitch and high boiling coal tar distillate modified by inert mineral filler. Coatings for ShaliEnamel P is produced purely out of coal tar, whereas coatings for ShaliEnamel R is produced by blending coal tar pitch.

Characteristics:

			Annexure - A	Gr BS 105/8	Gr BS 120/5	Gr AWWA Ty-1
Filler content by ignition, % by mass				25 – 35	25 – 35	25 – 35
Density at 25 OC, g/cm3				1.40 – 1.60	1.40 – 1.60	1.40 – 1.60
Softening Point (ring and ball, OC				105 – 116	120 - 130	104 – 116
Penetration (total moving mass), 10--1
mm
25 OC, 100 g				5 – 12	1 – 9	5 – 10
45 OC, 50 g				8 – 30	3 – 16	12 – 30
Flow time, seconds
	230 OC			9 – 16	-	-
	240 OC			-	9 – 24	-
Sag, Max, 24 hrs, Max, mm						1.6 @ 70 OC
	70 OC			1.50	-	1.6 @ 70 OC
	80 OC			-	1.50	-
Low temperature cracking and
disbanding
	-25 OC			None	-	-
	-20 OC			-	None	None @ -23.3
						OC
Bend at 0 OC
	First crack, min, mm
			Initial	15	-	-
			After heating	10	-	-
	Disbonded area, max, mm2
			Initial	3000	-	-
			After heating	5000	-	-
			After heating
Impact, 25 OC, max, mm2, disbanded
area				10000	-	10323
	Direct			-	-	3871
	Indirect
Peel, Initial & Delayed, max, mm
	40 OC			3.0	-	No peeling @
	50 OC			3.0	-	27 OC, 38 OC
	60 OC			3.0	3.0	49 OC, 60 OC
	70	O	C	-	3.0	& 71 OC
	70		C
Cathodic disbanding in 28 days, max,				5	5	-
mm
Electrical resistance, 10000 volts / mm				No breakdown	No breakdown	No breakdown
Recommended application temperature,				235 – 250	235 – 255	235 – 250
OC
Recommended pipe surface profile,				65 – 100	65 – 100	65 – 100
microns
Recommended DFT of synthetic primer,				15 – 30	15 – 30	15 – 30
microns
Recommended pipe pre-heating				40 – 50	40 – 50	40 – 50
temperature, OC
Recommended in service temperature,				-25 - +65	-5 - +80	-25 - +65
OC

Application

Corrosion protection of pipes for carrying crude, liquid or gases before pipes are buried under earth / sea.

Advantages

Excellent adhesion to metal, high electrical resistivity, good flexibility, temperature susceptibility and chemical stability.

Resistant to bacteria / marine organisms, root growth, back fill damage, petroleum products and water.
Cathodic disbonding resistivity

Application Methodology

Depending upon the size of the melting kettle, cut ShaliEnamel P / R into small pieces of approximately 1 to 5 kg each.

Fill the kettle up to 40% of its capacity.

Begin heating till the application temperature is attained. During heating, slowly add balance material upon reaching fluidity.

Stir occasionally to avoid carbonisation at the bottom of the kettle. This will prevent coking of the material and save considerably on fuel.

Consume the heated ShaliEnamel P / R within 3 hrs once the application temperature is reached. Enamel held at the application temperature for more than 3 hrs also to be rejected, if it is found off specification

Quantity of enamel remaining in the kettle on reheating should not exceed 10% of the fresh charge.

Maximum temperature of the kettle should never exceed 260 OC and enamel above this temperature should be rejected..

In the event of Plant breakdown, or any other reason, put off burner and bring down the enamel temperature to 180°C or lower keeping agitator on for a period not exceeding 8 hrs.

Apply ShaliEnamel P / R on cleaned and primed pipe when metal temperature is above 7 OC and care should be taken to ensure that the pipe is free from dust, dirt, oil and moisture.

Health & Safety

Use goggles, mask, nose cover and hand gloves during application
Clean hands with warm soap water after application

Packing

Available in 250 kg drum.

Storage

Keep in cool and dry place under shed away from heat.

Pipeline Coating