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A.C. Pressure Pipes :-

Hari AC Pressure Pipes are made from a careful blend of imported Asbestos Fiber generally imported from Canada & Russia, and high quality cement. Hari Pressure Pipes are manufactured on highly sophisticated and modern machines by skilled personnel.

Stringent quality control procedures at various stages ensure a consistently high standard product which even exceeds Is specifications.

Fibre Reinforcement :- The manufacture of Asbestos Cement Pressure Pipes exploits to the full, the strength , flexibility and indestructibility of the Asbestos Fibres. These fibers provide the reinforcement for the cement, the two materials make the perfect bond. The raw material is carefully processed and mixed by wet process which ensures uniform high quality of pipes. 

Easy to join easy to remove :- Hari Industries offers both CID joints and AC coupling for easy installation. Both these types of joints offer flexibility and ensure watertightness.

Certificate of Performance :- Hari Pressure Pipes are stamped with ISI mark as per IS : 1592 promising reliable performance and genuine long term economy. Our list of clients include various Govt. Departments all over the country, public and private undertakings. 

USES :-  AC Pressure Pipes enjoy multiple uses including the following

  • Agriculture

  • Irrigation

  • Lift Irrigation

  • Municipalities

  • Projects and colonies works with contractors.

  • Public Health Departments of various States.

  • Water Supply and sewage schemes.

  • Under drainage of lined canals

How to Store :-

Pipe must be stacked properly as shown, to avoid damage. The width and depth of the trench works should be as recommended in the diagram. The excavated soil should be dumped on the traffic side of the trench to form a protection. Space of about 0.5 meter should be left along the trench for workmen to move freely.

Product Facts :-  Hari AC Pressure pipes have a standard length of 4m. They are available in nominal Diameters of 80, 100, 125, 150, 200, 250 & 300 mm in Classes 10, 15 & 20.


Coupling and Joints :-

Hari AC Pressure Pipes can easily be joined together with AC Hydrotite Coupling or Cast Iron Detachable Joints.

Hari AC Hydrotite Coupling :-

Hari Hydrotite Joint Consists of a precision machined AC Hydrotite Coupling with three innner grooves fitted with one rubber 'O' ring in the centre and two scientifically designed rubber 'V' rings on either side. The 'O' ting ensures separation of the two pipes in the coupling and allows flexibility. The 'V' rings combine the principle of compression and hydrostatic sealing to ensure watertightness.


Laying and jointing of Pipes :-

  • Before laying, the pipes should be inspected to ensure that no damage has taken place in transit.

  • Clean the pipe ends the components of CID joints. The CID joint comprises a central collar, two flanges , two round rubber rings, bolts and nuts. The two rubber rings placed on the pipe ends and copressed between collar and flange , by means of steel bolts provide the necessary sealing. Since rubber rings for pipes of diameters 150 mm and below cannot be  placed on the pipes by stretching, an AC or wooden cone may be used for this purpose.When placed by the above method, the rubber ring will not be in the correct position. Hence it is  essential to make a site gauge as illustrated n the figure and the ring is brought to the correct position.

  • Insert the flanges on pipe ends. With the help of wooden cone  place the rubber rings on pipe ends and roll them to the correct position.

  • Place the central collar of the laid pipe close to the pipe to be joined . Centralise the collar, leaving a gap of about 5mm between the pipe ends.

  • Now position the rings to touch the collar end. Move the flanges close. Insert bolts in the flange holes and tighten them. The bolts should be tightened uniformly to ensure a leak proof joint.

  • After testing the pipeline , the trench should be filled up.

Note :- We can also provide ISI marked C.I. Detachable Joints, C.I. P/E Specials, C.I.D/F Fittings & Pipes.

S.L. No. NOM Dia.
Class - 10 Class - 15
External Dia
External Dia
i 80 9.5 99.5 9.5 99.5
ii 100 9.5 120.0 10.0 121.0
iii 125 9.5 145.0 11.0 147.0
iv 150 9.5 171.0 13.0 176.5
v 200 11.5 225.0 16.5 233.5
vi 250 12.0 276.5 17.0 284.5
vii 300 14.0 328.5 20.0 340.5


Tests and specifications :-

Hari A.C. Pressure pipe are manufactured and tested for strict conformity to Is 1592/89 G.G. Pipes Pvt. Ltd., Kaladera, Jaipur have got a sophisticated laboratory with the most modern equipment for testing A.C. Pressure pipes.

1. Hydradraulic Pressure Tightness Test :-
Every pipe is tested to he pressure corresponding to the class of pipe as given below :
Class of Pipe Test Pressure in Kg./cm2 Max. recommended Working Pressure Kg./cm2
10 10 5.0
15 15 7.5
20 20 10


The pipe is placed in a hydraulic press and the hydraulic pressure inside the pipe is progressively increased to the specified value and maintained for a minimum of 30 seconds. Pipes should not indicate any sweating on the outside.
2. Hydraulic Bursting Test :- Hari Pressure pipe are tested to satisfy a minimum unit bursting stress of 20 N/mm2 for sizes upto and including 300 mm diameter.
3. Transverse Curshing Stress :- The unit Transverse crushing stress arrived at from transverse crushing test shall not be less than 44 N/mm2.

4. Longiudinal Bending Test :- The unit longitudinal bending stress arrived at from longitudinal bending test shall not be  less than 24.5N/mm2. Only pipes of 150mm dia and less are tested for longitudinal bending strength increases considerably as the section modules increases and therefore need not be separately considered.


5. Hari A.C. Pressure Pipes also satisfy the following ratios between Bursting Pressures (BP), Hydraulic Test Pressures (TP) and Normal Hydraulic Working Pressures (WP)

Nominal Dia. BP/TP BP/WP
80 and 100 2.00 4.0
125 to 200 1.75 3.5
250 to 300 1.50 3.0