G-Range Hub Clamp Connectors

Designed to meet the requirements of plant operators.

Due to their efficiency, lightness and reliability, together with extreme qualities of leak tightness, the G-Range pipe connection offers significant benefits for use in industrial plant in a wide variety of applications. Although designed primarily for adverse pressure and temperature conditions, more modest applications can be considered due to ease-of-installation and assembly, particularly when compared with the alignment and tightening of standard flanges.

The G-Range pipe connection comprises: a pair of hubs for welding to the pipe (similar to a flange); a clamp set, which can be rotated around the hubs to suit the most practical positions; and a seal ring.

The seal ring is a modified cone ring giving excellent leak tightness properties under the most severe conditions of pressure and/or thermal shock.

On assembly the taper joint faces compress the seal ring radially. The sealing force is provided by the stored energy in the stressed seal ring, any internal pressure intensifies the sealing action.

Weight Saving

Using high strength alloy clamps and flush bore seal rings, minimum fluid seals areas and low make up loads are achieved allowing smaller and more compact units than flanges of equivalent pressure ratings.

Resistance to Pressure and Thermal Shock

Cold quench conditions and thermal cycling are the cause of most leakage problems, where conventional compressible type joints and seal materials are used. The flexibility of the seal ring compensates for this during thermal transient conditions.

High Pressure Containment

The higher the pressure, the more effective the G-Range connection becomes, as internal pressure intensifies the seal.

High Temperatures

The standard 'all-metal' seal ring is suitable for most applications – maximum temperatures are limited only by the connection materials selected.

Extreme Leak Tightness

The seals remain leak tight under the most arduous conditions of pressure, temperature and vacuum conditions, even after many thousand hours of operation.

Download the Destec G-Range Clamp Connectors PDF

Download the Destec G-Range Clamp Assembly Guide

Materials

Destec G-Range connections are supplied in these standard materials. Destec Seal Rings are supplied coated with either PTFE, Molybdenum Disulphide or Graphite, depending on the application. Special G-Range connections are manufactured in many materials including Duplex steels and Nickel-based alloys.

Other materials can be used. Please contact sales@destec.co.uk for further details.

Pipe Material	Carbon Steel / Carbon Manganese Steel		Stainless Steel 316 type	Duplex (22% Cr)	Super Duplex (25% Cr)
		up to 300˚C	over 300˚C
HUBS	A350-LF2 (modified)	A182-F316	A182-F316	A182-F51	A182-F53/F55
CLAMPS	A29-4140	A29-4140	A182-F304	A29-4140	A29-4140
STUDBOLTS	A193-B7	A193-B7	A193-B8	A193-B7	A193-B7
NUTS	A194-2H	A194-2H	A194-GR8	A194-2H	A194-2H
SEAL RINGS	AISI 4140	A564-630	A638-660	INC 718 or 725	INC 718 or 725

Seal Rings – Orifice, transition, blind.
Clamp Sets – Heavy duty, quick release.
Hubs:

Heavy Duty.
Nozzles.
Threaded.
Socket weld.
Reducing.
Enlarging.
Tees and Elbows.
Adaptors.

Many special connections, in a variety of materials, are manufactured to enhance the standard range, for example:

SHROUDED BORE
JACKETED
FLOW THROUGH JACKETED
EXTREME PRESSURE
QUICK RELEASE
REMOTELY OPERATED
HINGED VESSEL CLOSURES
ORIFICE CONNECTIONS

Destec will design special G-Range connections to meet customers' requirements.

Re-Usable Seal Rings

The 'all-metal' seal ring is elastic in design, and, on dismantling, reverts to its original form, ready for re-use. All seals of given size are interchangeable without any pre-fitting.

Special Connections

Existing troublesome flange joints can usually be converted on site to incorporate the Destec seal ring, as can vessel and heat exchanger closures. Destec seal rings are currently in use up to 2m diameter (2000mm).

For more information about our products and services call us on 01522 791721 or email us at sales@destec.co.uk

G-Range Hub Clamp Connectors

Making and Maintaining the right connection.

DESTEC ENGINEERING LTD

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