612 Steel Double-End Expansion Joint
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Xylem's Smith-Blair 612 double-end expansion joint is a fitting with slip type joints and a slip pipe at each end to accommodate axial pipe movement. This design absorbs changes in pipe length due to concentrated pipe movement in a given area of pipe. The expansion joint is available in a variety of end types including plain ends beveled for welding and flanged, and can be customized to handle many applications. This 612 expansion joint must always be anchored to prevent the total pipe movement from accumulating in one end.
Key Product Features
- Meets applicable AWWA C221 Standards
- Compact in design and can be customized to handle many applications
- Available in a variety of end types: Plain ends beveled for welding and flanged
- Accommodates a large amount of axial pipe movement, relieving stress buildup in the pipeline
- Hard Chrome-Plated Slip Pipe helps:
- Ensure free movement
- Reduce friction and wear on the packing rings
- Resist scratching and scoring of the slip pipe surface
- Optional Limit Rods offer three important functions:
- Limits travel of slip pipe, preventing it from pulling out of the body
- When using two or more expansion joints, they activate the adjoining sleeve when the other has reached its full limit
- Is used to indicate the position of the slip pipe within the body to know where it is in the expansion/contraction cycle
- Generous Packing Provides:
- Great sealing between the body and the slip pipe
- Increased life of the packing before replacement is necessary
- The possibility of considerable tightening and adjustments in the future
- Designed to allow replacement of packing without taking the expansion joint out of service
Xylem's Smith-Blair 612 Double End Expansion Joint is a fitting with slip-type joints and a slip pipe at each end, designed for absorbing changes in pipe length due to concentrated pipe movement in a given area of pipe. The 612 accommodates a large amount of axial pipe movement, relieving stress buildup in the pipeline at both ends simultaneously. Compact in design and customizable to handle many applications, the 612 is available in a variety of end configurations.
The 612 is built for reliable, long-service-life performance. The body and body flanges are Carbon Steel per ASTM A283C, A53, or AISI C1015-20, finished with Flexi-Coat® fusion-bonded epoxy; the flange incorporates an integral oval bolt head pocket for one-wrench installation, and a stop plate is welded to limit travel from left to right in the body. The slip pipe is Carbon Steel per ASTM A283C, A53, or AISI C1015-20, with Flexi-Coat® finish on non-chrome surfaces and hard chrome plate applied to the machined surface to facilitate easy movement, protect against corrosion and pitting, resist scratching and scoring, and reduce friction and wear on packing rings. The packing gland is Carbon Steel per ASTM A283C, A53, or AISI C1015-20, designed to compress packing for a positive seal and removable for future maintenance and packing adjustment. The limit flange is Carbon Steel per ASTM A283C, A53, or AISI C1015-20 with Flexi-Coat® finish.
The Smith-Blair 612 is designed for axial pipe movement only and is not intended for angular deflection. A wide range of options is available to meet your project requirements, including alternative materials of construction (304SS, 316SS, Monel, etc.), Type 304 or Type 316 Stainless Steel hardware with fluoropolymer-coated nuts to prevent galling, alternative gasket/packing materials (Buna-N, EPDM, etc.), anode connectors, anchor studs, higher working pressure designs, custom joint or expansion lengths, built-in anchor base, custom end configurations, pipe stops, and packing lubrication features such as alemite fittings or lantern rings.
Note: Double end expansion joints must always be anchored to prevent the total pipe movement from accumulating in one end. Slip-type expansion joints must be installed in an accessible location for future maintenance and packing adjustment.
THIS PRODUCT DOES NOT RESTRAIN PIPE MOVEMENT. Proper anchoring is required to prevent pipe pullout. Failure to anchor or improper anchoring can result in dangerous pipe content escape, property damage, serious injury, or death. Read the product installation instructions prior to installing this product.