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STRAUB

With more than 50 years of experience, STRAUB has been offering solutions for establishing safe, durable and economical pipe connections. Its headquarters is located in Wangs, Switzerland. Read More

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Pipe Fittings and CouplingsView all

  • Pipe Couplings

    Straub lightweight and fully assembled grip-L and open-flex wrap-around couplings are available in diameters ranging from 1 to 120 inches. They have 316 stainless-steel construction and are effective in providing a leak-proof seal.

  • Pipe Fittings

About Straub

STRAUB Werke AG is a leading manufacturer of pipe couplings for the plumbing, chemical processing, HVAC and marine industries. The STRAUB Coupling catalogue includes stainless-steel grip-L couplings and open-flex wrap-around couplings. STRAUB pipe couplings are designed for handling pipe misalignments & vibrations, and extensively used in the shipbuilding, wastewater treatment and construction industries. These flexible and lightweight couplings come fully assembled and can be easily installed without using any special tools. STRAUB grip-L couplings are designed for light pipes and low-pressure applications, whereas STRAUB open-flex couplings can be used to join pipes made of steel, galvanised steel, stainless steel, PVC or copper. These couplings are available in diameters ranging from 1 to 120 inches and ensure a tight & leak-proof seal.

Things To Consider

Shipping

These STRAUB couplings are small in size and require compact packaging. Hence, they are delivered in packs consisting of several pieces. They are suitable for courier shipment and not air freight.

Major Trade Names

Metal-Grip Couplings

They join plain end pipes having axial restraint and provide pull out resistance to excess working pressure. As the internal pressure increases, the teeth inside the coupling's circumference create an...Read More 

OPEN-FLEX Couplings

They allow temporary or permanent repair of leaks due to pitting holes, weld joints and short cracks, thus minimising downtime. Their split gasket design allows installation without pipe disassembly.

REP-FLEX Couplings

These couplings allow the repair of broken pipes for preventing leakage of water. They are ideal for repairing steel, cast iron, fibre cement, ductile cast iron & PVC pipes on site.

COMBI-GRIP Couplings

They allow seamless transitions between metal and plastic pipes. They also compensate for pipes of varying outside diameter pipes and prevent axial movements. They have self-anchoring teeth for grippi...Read More 

STEP-FLEX Couplings

These couplings overcome large diameter differences between pipes. They compensate for diameters from 10 to 30 mm. They come with stainless steel strip inserts for protecting the sealing sleeve of the...Read More 

Straub Competitive Advantages

Conductivity Clips

These clips ensure continuous electric current between pipes when using grip type couplings. They are placed in between the grip type coupling and pipe surface. These easily grip the pipe surface as the coupling is tightened.

Fire Fences

These fire resistant couplings are used in locations like engine rooms, that are prone to fire hazards. They retain the gasket and pressure in case of fires and prevent the couplings from loosening.

Combi Grip

These grips ensure a tight connection and smooth transition between metal & plastic pipes. They also compensate for differences in outside diameters of pipes. Additionally, their self-anchoring design prevents the grip from moving / slipping in the case of differently sized pipes.

Frequently Asked Questions

Do STRAUB couplings offer axial flexibility?

Yes, STRAUB Flex & Open-Flex couplings offer axial flexibility in case the pipe ends move towards or away from each other. These couplings can accommodate pipe shifts while ensuring a leak-tight seal for the passing media.

Do these couplings require welding?

No, STRAUB couplings can be readily installed onto the pipes with simple tools and do not require welding for leak-tight seals. These couplings can be fixed just by screwing bolts onto the pipe using a torque wrench.

Are STRAUB couplings reusable?

Yes, Metal-Grip, Grip-L, OPEN-FLEX and Flex couplings from STRAUB are reusable as they have a wrap-around design.

What pipes are ideal for STRAUB couplings?

They are ideal for plain end pipes made from ductile iron, steel, stainless steel, PVC, FRP, CPP, CPVC, copper and concrete.

Do these couplings require lubrication?

No STRAUB couplings have built-in gaskets and do not require additional lubricants while installation.

What applications are these couplings suitable for?

They are ideal for vacuum, pressure and suction lines.

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