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	The Grayloc® connector has been a unique device for connecting piping systems for over 50 years. It seals through the elastic action of a reusable metal ring. It is lighter and stronger than a flange. No other make and break connection requires so little space. Maintenance time is reduced; spare parts inventory is lowered. The Grayloc® connector provides immediate savings in weight, space and fabrication time. The Grayloc® connector offers continuing advantages in maintenance costs and improved performance. It is truly a unique connection. It has become the recognized standard for clamp connectors.

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	The standard Grayloc^® assembly has two hubs arranged for butt welding to pipe. However, a complete line of other piping components is available, including socket weld and threaded hubs. Heavy duty connectors for oilfield and other applications are also available. Other equipment manufacturers (valves, pumps, compressors, vessel, etc.) are licensed to machine Grayloc^® hub profile/ seats integral to their products. A complete line of fittings is available in the Grayloc^® design for all nominal pipe sizes and service conditions.

Tension, Compression, Bending

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When manufactured from the same material as the pipe, the Grayloc^® connector surpasses the strength of the pipe and that of most other components. The rib of the seal ring prevents the seal lip from being crushed by over-tightening. While it acts as a positive stop during makeup, the rib also transfers compressive and bending loads from one hub element to another. The rib has bearing area ample to carry the most severe loading that the piping system can withstand.

Remotely Operated Connectors

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The Grayloc^® Remotely Operated Connector is a field-proven mechanical connector used in:

Hazardous environments
Personnel restricted areas
Automated (batch-type) operations

Metal to Metal Seal

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	A Grayloc® connector has three components: a metal seal ring, two hubs and a clamp assembly. The seal ring is a "T" in cross section. The leg of the "T" forms a rib that is held by the hub faces as the connection is made. The two arms form lip seals that create an area of sealing surface with the inner surface of the hub. The clamp fits over the two hubs and forces them against the seal ring rib.

Lighter & Smaller

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	Save valuable weight and space Compared to conventional ANSI or API ring joint flanges, the Grayloc^® connector is significantly lighter and smaller. Diameter of the clamp is less than that of a flange. The length of the weldneck is also shorter than that of a comparable flange, further reducing weight and space. The clamp may be rotated a full 360° around the hub to orient the bolts for most convenient tightening. As opposed to flanges, Grayloc^® connectors allow components, such as valves, to be installed with no regard to bolt hole alignment.

Engineering, Manufacturing, Quality & Field Service

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	The Grayloc^® Products Quality Assurance program in Houston complies with the ASME Section VIII Div. 1 and 2 Boiler and Pressure Vessel codes. ASME Certificates of Authorization for ASME Section VIII Div. 1 ("U") and 2 ("U2") are currently maintained. Since the mid 1960's Grayloc^® Products began supplying equipment in accordance with ASME Section I - Power Boiler Code, ASME Section III - Nuclear Power Plant Components Code, and ASME Section VIII - Unfired Pressure Vessel Code. ASME certification and quality systems for the design and manufacture have been continuously maintained.

Construction

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	Saves Time and Money ! ! ! In the fabrication of piping systems, less time is required to weld Grayloc^® hubs to the pipe since there are no bolt holes to align. There are only 4 bolts to tighten rather than 8 to 24 as on a conventional flange. The torque required to make up a Grayloc^® connection is less than that of a ring joint flange - as much as 75% less. Maintenance is considerably simplified by the fact that removing four bolts will free a connection.

Ultimate Connection

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Grayloc^® connectors have applications in a wide range of industries.

Oil and gas production
Petroleum refining
Chemical processing
Fossil and nuclear power generation

Aerospace manufacturing
Synthetic fuels processing
Coal gasification and liquefaction
Industrial gas manufacturing
Food processing
Environmental

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