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Quality Type Approval & Testing API 6FB FIRE TESTING - ASME B 31.3 CHAPTER IX GAS TEST The need for correct analysis of product performance is a prerequisite when specifying pipe connectors. Having successfully completed strain gauge testing under full load conditions, fire testing to API 6FB parts 1 and 2 and full gas testing under the conditions of ASME B 31.3 CHAPTER IX GAS at temperature plus bending, the G-LOK ® range of clamp connectors suits most applications. Independent testing and witnessing, resulting in Lloyds Register Type Approval, coupled with extensive Finite Element Analysis during the fire test programme, affords clients one of the most comprehensively tested clamp connector available. 3
G-LOK ® – The Advantages The G-LOK ® Connector is designed to offer the strength and sealing integrity of a welded joint and the versatility of a mechanical joint. It serves the same purpose as a bolted flange assembly, with the advantages of being more easily installed, lighter and smaller. A self-energized, pressure activated connection, the G-LOK ® clamp-type connector consists of four basic elements: • (1) Hub • (2) Clamps • (3) Seal • (4) Bolting G-LOK ® std free position The hubs are usually welded to pipe; the seal is installed and the bolting is tightened on the clamps to form a pipe connector that provides superior strength and leak integrity. The G-LOK ® is commonly used in service with temperatures of up to 650°C. The G-LOK ® also excels in high pressure applications, where working pressure of 30,000 psi is not uncommon. The G-LOK ® clamp has been designed for the optimum strength of a bolted connection. Since the bolts are perpendicular to the axis of the pipe, they do not receive direct bending and pressure loads. This system of clamping provides greater strength than ANSI or API G-LOK ® std made-up position flanges at a fraction of the seal size and weight as a result of this design. Less bolting torque is required for proper seating of the seal. The design of the connector provides considerable stored energy in the system G-LOK ® recessed free position when compared with ANSI or API flanges. This stored energy works to provide leak resistance during thermal cycling and maintains proper bolt loading. When properly installed, the G-LOK ® will usually provide greater bending and torsional strength than the connecting pipe. The full face contact of the connector resists bending and ensures rigidity not provided by other clamp-type connectors. The pressure and temperature limitations are determined only by the materials of construction. G-LOK ® recessed made-up position 4 G-LOK ® shrouded free position G-LOK ® shrouded made-up position HOW THE G-LOK ® CONNECTORS SEALS The seal ring in the G-LOK ® resembles a ”T” in cross section. The base of the ”T” is the rib that is held by abutting hub faces as the connection is made up. The top of the ”T” forms the lips that seal against the inner surfaces of the hubs. In the assembly of the connection, the clamps fit over the two hubs, and as they draw the hubs together the seal ring rib ensures proper seal alignment. As the hubs are drawn together by the clamp assembly, the seal ring lips deflect against the inner sealing surfaces of the hubs. This deflection elastically loads the lips of the seal ring against the inner sealing surface of the hub, forming the self-energized seal. Internal pressure reinforces this seal, so the sealing action of the G-LOK ® is both self-energized and pressure energized. G-LOK ® clamp connectors are interchangeable with other connectors designed and manufactured according to the same standard.
Page 1 and 2: CLAMP CONNECTORS
Page 3: LLOYD’S REGISTER QUALITY COMPANY
Page 7 and 8: Sizing Selection HOW TO SELECT THE
Page 9 and 10: Assembly and Disassembly DISASSEMBL
Page 11 and 12: Assembly and Disassembly 10 CLAMP S
Page 13 and 14: Assembly and Disassembly STANDARD C
Page 15 and 16: Other Configurations G-LOK ® conne
Page 17 and 18: Standard Hubs (mm) Designations The
Page 19 and 20: Standard Hubs (inch) 18 NPS SCH. G-
Page 21 and 22: Heavy Duty Hubs (mm) 20 NPS SCH. G-
Page 23 and 24: Heavy Duty Hubs (inch) 22 NPS SCH.
Page 25 and 26: Seal Ring (mm - inch) G-LOK ® seal
Page 27 and 28: Clamp (mm) G-LOK ® clamps are manu
Page 29 and 30: Pressure Temperature Rating - Carbo
Page 31 and 32: Pressure Temperature Rating Stainle
Page 33 and 34: Pressure Temperature Rating - Duple
Page 35 and 36: Pressure Temperature Rating - Super
Page 37: GALPERTI ENGINEERING AND FLOW CONTR

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