Metallic Expansion Joints - Thorburn Flex Inc

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THORBURN FLEXIBLE PIPING SPECIALIST TABLE OF CONTENTS GENERAL INFORMATION Why use Thorburn's metal bellows type expansion joints? .... 5 Accessories ......................................................................... 6-7 Standard flange data .............................................................. 8 Corrosion resistance reference table ................................ 9-11 Bellows material data & common metallurgical problems .... 12 How to interpret Thorburn's bellows design analysis documentation ..................................................... 13 Thorburn's metal bellows design elements ..................... 14-15 Thorburn expansion joints in piping systems ................. 16-17 Anchor, guide and support ............................................. 18-19 Pipe guide spacing table ...................................................... 20 Expansion joint standard symbols ....................................... 20 Thermal expansion data ...................................................... 21 Typical design specifications ........................................... 22-23 Salient building process ....................................................... 24 Specification data sheet for metal bellows expansion joint .. 25 Installation instructions ......................................................... 26 Safety and design recommendations ................................... 27 METALLIC FLEX CONNECTORS Metallic braided Flex connectors - Introduction .................... 28 Pump/compressor connector threaded and welded............. 29 "9617PA" flanged pump connector ....................................... 29 Typical metallic expansion joint applications for piping systems ............................................................. 30 SINGLE-FLEX Single-Flex Model "SF" ........................................................ 31 Hing-Flex Series "HF" .......................................................... 32 Gim-Flex Series "GF" ........................................................... 33 Single-Flex Model "SF" ........................................................ 34 Single-Flex Model "SF" - How to order ................................ 35 Single-Flex Model "SF" specifications ............................. 36-43 DUAL-FLEX Dual-Flex "DFU" ................................................................... 44 Dual-Flex "DFP" ................................................................... 45 Dual-Flex "DFT" .............................................................. 46-47 Dual-Flex Model "DF" ........................................................... 48 Dual-Flex - How to order ...................................................... 49 Dual-Flex specifications .................................................. 50-52 EXTRA-FLEX Extra-Flex Model "ESF/EFD" - Introduction .................... 53-55 How to order Extra-Flex ....................................................... 56 Extra-Flex Model "ESF/EFD" specifications .................... 57-63 COMP-FLEX Comp-Flex durable expansion compensators ...................... 64 Comp-Flex HPC Series ................................................... 65-66 PRESSURE BALANCED EXPANSION JOINTS Pressure balanced elbow exp. joints "PBES" and "PBEU" ..................................................... 67-68 In-line pressure balanced universal "IPBU" externally pressurized "IPBE" .......................................... 69 DUCTFLEX Ductflex round Series "SDF" - Introduction .......................... 70 Ductflex - How to order ........................................................ 71 Ductflex specifications ..................................................... 72-74 Angle flange data ................................................................. 75 Ductflex rectangular - Introduction .................................. 76-77 Ductflex rectangular Single-Flex specifications .................... 78 Ductflex universal Dual-Flex Series "DFRU" and "DFRV" .... 79 MINIATURE BELLOWS Miniature nickle metal bellows Series TMB .......................... 80 HOT-FLEX Heavy duty teflon lined metal expansion joint system ........ 81 Hot-flex “HF” construction details ....................................... 82 Page 4
THORBURN FLEXIBLE PIPING SPECIALIST WHY USE THORBURN'S METAL BELLOWS TYPE EXPANSION JOINTS? All piping or ducting systems are subjected to changes in their geometry due to various factors, some of which are: a) Thermal: i.e. • Startup to operating temp. • Variations in ambient temp. • Emergency or fault conditions b) Pressure: i.e. • Deformation, due to constant pressure • Deformation, due to pulsating pressure • Deformation, due to vibration c) Mechanical: i.e. • Movement of other equipment • Thermal growth in other equipment Where the incorporation of sufficient natural flexibility in such a piping or ducting becomes a problem, three basic alternative solutions are open to the systems analyst. 1) The expansion loop 2) The slip type expansion joint 3) Thorburn bellows type expansion joint 1) EXPANSION LOOPS The "loop" is the oldest method of dealing with pipe movement and probably the most expensive when one considers today's high costs of material and labour. In addition, pressure drops, heat loss, high anchor loading together with the large space requirement, can make this method economically unsound for the relatively small amount of movements that can be accommodated with the pipe loop. 3) HOW A THORBURN METALLIC BELLOWS WORKS Thorburn's metallic bellows is a flexible seal. The convoluted portion of an expansion joint is designed to flex when thermal movements occur in the piping system. The number of convolutions depends upon the amount of movement the bellows must accommodate or the force that must be used to accomplish this deflection. The convoluted element must be strong enough circumferentially to withstand the line pressure of the system, yet responsive enough longitudinally to flex. The longitudinal load (pressure thrust) must then be absorbed by some other type of device. These are usually anchors, tie rods, hinges, or Gimbal structures. Pressure thrust can be calculated by multiplying the effective area shown in the catalogue by the working pressure. 2) SLIP TYPE EXPANSION JOINTS Derived from the "Stuffing Box", the slip type expansion joint is an improvement on the Expansion Loop but is somewhat limited in its applications, being suitable for axial motion only. Small amounts of lateral or angular displacement will cause binding and eventually premature leakage. The design of this product is such that a regular examination and maintenance program must be introduced so that if leakage occurs, packing is tightened or replaced. In most cases the initial cost of the Slip type expansion joint greatly exceeds that of the Bellows expansion joint designed for the same application. Another factor to be considered is maintenance costs of Bellows type vs. the Slip type, as the bellows type requires no maintenance once correctly installed. Graphic illustration of Thorburn's tied universal expansion joint BELLOWS MOVEMENTS BELLOWS TYPICAL SHAPES Types of bellows movement Principle for operation of Toroidal shape, extremely Lyre shape, pressure a bellows corrugation pressure resistant resistant and flexible Collars Axial Angular Lateral Page 5
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THORBURN'S NON-METALLIC EXPANSION J
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Metallic Expansion Joints - Thorburn Flex Inc

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