Flange Pipe types
|Available Pressure Ratings
|Welded Flange Pipes
|Flanges are welded on either or both ends of the barrel. As per customer requirement, flanges are sometimes welded on the barrel at a point other than the ends which are called Puddle flanges.
|Dia. 1100 mm. Length- up to 5.0 metres
|PN 10, PN 16 and PN25 (PN40 on request)
|Screwed Flange Pipes
|Flanges are screwed on the barrel instead of welding.
|Dia. 450 mm. Length- up to 5.0 metres
|PN 10 and PN 16
|‘As Cast’ Flange Pipes
|Cast as a single unit using advanced Lost Foam technology
|Dia. 80 to 600 mm
|PN 10, PN 16, PN25
Over-ground and exposed installations
Ideal for over-ground pipelines and crossovers (such as on pillars, over a canal or other water bodies, roads, bridges etc.)
Any vertical pipelines used in treatment plants, pump houses, elevated/overhead service reservoirs.
Interconnection and connection for accessories
In pump house and water and sewage treatment plants where, various units and accessories are inter-connected.
As a Restrained Joint
Flanged Joints are rigid but can act as a restrained joint, reducing the requirement of thrust blocks and external restraining devices.
As temporary installations
Applications where pipelines need to be disengaged or transferred from one location to the other.
Note: Flanged pipes are not meant for underground installation. Due to the risk of excessive bending moments being imposed, it is recommended that the flanged pipeline is NOT buried.
Stronger: Ductile Iron Flanged Pipes are much stronger because of its higher tensile strength and better impact resistance.
Higher factor of safety: It offers higher factor of safety against pressure fluctuations, water hammer and outside impacts.
Lighter to use: DI Flange Pipes are lighter compared to CI Flanged pipes, reducing handling and transportation cost.
Negligible breakages in transit and during handling: Does not break on sudden impacts. Loss due to transportation and handling are minimized.
Reduced pumping costs: The Pipes are centrifugally cement mortar lined. This results in a smooth inside surface which reduces friction loss.
Longer life and excellent corrosion resistance: Inside cement mortar lining does not allow corrosion of the internal surface. The external Zinc/Zinc Aluminium finished with Bitumen/Epoxy etc coatings offer robust protection against external corrosion.
Dimensional accuracy & better finish : Centrifugal casting of Flange Pipes ensures uniform wall thickness and excellent surface finish that cannot be achieved in green sand casting due to floating, shifting or deformation of the core