Hosemaster - Metal Expansion Joints
Vendor: Hosemaster
Category: Metal Hose
Application:
Because expansion joints are designed to accommodate pressure and movements without the need for braid, they are capable of handling all three planes of movement: lateral, angular, and axial. Expansion joint movement and pressure bearing capabilities are determined by the number of convolutions, as well as material thickness, number of plies, and wall height specified by the product’s individual design. Multi-ply expansion joints are ideally suited for applications where vibration may be present. Additionally, multi-ply designs feature lower spring rates which reduces stress on piping components, and increases cycle life for a given installation.
Expansion Joint Types
Internal Liners
Comparison of Ratings, Features, and Available Options
| EJ Styles | Relative Movement Capability | Relative Spring Forces | Pressure Thrust on Piping System | Available Features | |||||||
| Axial | Angular | Lateral | Axial | Angular | Lateral | Internal Flow Liner Types | External Cover | Redundant Ply Design | End Connection Types | ||
| US Unrestrained Single |
↔ | ↔ | ↓ | ↔ | ↔ | ↑ | YES | SWTWFWSDTD | YES | YES | BBWEFFVFLJ |
| LS Limit Single |
↔ | ↔ | ↓ | ↔ | ↔ | ↑ | YES | SWTWFWSDTD | YES | YES | BBWEFFVFLJ |
| TS Tied Single |
— | — | ↓ | — | — | ↑ | NO | SWTWFWSDTD | YES | YES | BBWEFFVFLJ |
| HS Hinged Single |
— | ↔ | — | — | ↔ | — | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| SHS Slotted Hinged Single |
↔ | ↔ | — | ↔ | ↔ | — | YES | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| GS Gimbaled Single |
— | ↔ | — | — | ↔ | — | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| UU Unrestrained Universal |
↔ | ↔ | ↑ | ↔ | ↔ | ↓ | YES | SWTWFWSDTD | YES | YES | BBWEFFVFLJ |
| TU Tied Universal |
— | — | ↑ | — | — | ↓ | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| PBS Pressure-Balanced, Elbow, Single |
↔ | — | ↔ | ↔ | ↔ | ↑ | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| PBU Pressure-Balanced, Elbow, Universal |
↔ | — | ↑ | ↔ | ↔ | ↓ | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| PBI Pressure-Balanced, In-Line |
↔ | — | — | ↔ | — | — | NO | SWTWFWSDTD | YES | YES | WEFFVFLJ |
| EPS Externally-Pressurized Single |
↑ | — | — | ↔ | — | — | YES | FW | INCL | YES | WEFFLJ |
| EPD Externally-Pressurized Dual |
↑ | — | — | ↔ | — | — | YES | FW | INCL | YES | WEFFLJ |
Pre-Engineered Expansion Joint Types
Basic Bellows
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A bellows can be supplied without end fittings for field installation. The skirt (straight portion at each end of the bellows) can be sized to fit a flange or pipe. Please specify skirt length and attachment type when ordering. |
Unrestrained Single
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Example of an unrestrained single expansion joint used in a proper piping system to absorb axial pipeline expansion. |
Example of an unrestrained single expansion joint used in a proper piping system to absorb lateral deflection, as well as axial compression. |
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An unrestrained single expansion joint is best used when piping systems are equipped with proper guides and anchors to absorb axial, angular, and a small amount of lateral movement.
Limit Single
Example of a Limit Single expansion joint used in piping systems with main anchors. The limit rods prevent damage to the expansion joint and piping system by absorbing full pressure thrust.
A limit single expansion joint is best used when main anchors and guides are in the pipeline. It allows for some axial movement as well as lateral movement; however, the hardware protects the expansion joint from exceeding its design movements.
Tied Single
Example of a Tied Single expansion joint where the expansion joint is installed 90º to the thermal growth of the piping. Because of the rods, the expansion joint is able to absorb lateral movement only
A tied single expansion joint is best used in piping systems without a main anchor. It allows for lateral movement only while also restraining pressure thrust.
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |