258 Full Circle® Repair Clamp Single Band
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Xylem’s Smith-Blair 258 Full Circle Repair Clamp provides a fast, economical means of repairing leaks from complete breaks, splits, holes, and cracks in carbon steel, stainless steel, ductile iron, and aluminum pipes. Designed especially for hot soil and other aggressive environments, this all-stainless steel repair clamp is available in 2” to 12” nominal pipe sizes.
Key Product Features
- All weldments are constructed of premium grade stainless steel to minimize the possibility of corrosion
- Smith-Blair’s exclusive “C” shaped keeper bar permits fast run-down of nuts against the clamps weldments while equalizing tension along the full length of the clamp
- Bridge plate flush mounted and bonded to the gasket assures even distribution of gasket pressure and prevents crimping
- Gridded, tapered, overlapping gasket offers excellent full curcumferential sealing and full adjustment to rough pipe surfaces
- A special high-strength ductile iron alloy lug utilizes a strength efficient computer-aided design that’s not only stronger, but also lighter and easier to install.
- Drop-in, self-securing bolts eliminate loose parts, save time and make installation possible with only one wrench
- Lugs with mutually supporting sliding fingers to assure proper bolt alignment while tightening. Permits maximum torque without bending of bolts
- The band locking system uses a unique lug core design and a band hemming process that resists pull-out and provides maximum band retention
The Smith-Blair 258 Full Circle Repair Clamp Single Band provides a fast, economical means of repairing leaks from complete breaks, splits, holes, and cracks in carbon steel, stainless steel, ductile iron, and aluminum pipes. Designed especially for hot soil and other aggressive environments, this all-stainless steel repair clamp is available in 2” to 12” nominal pipe sizes.
The band is Type 304 Stainless Steel per ASTM A240, available in 24 gauge for clamps 4.50” diameter and smaller, and 20 gauge for clamps 4.80” diameter and larger, with hemmed ends for lug removal in tight applications. Lugs are cast Austenitic Stainless Steel GR. CF8 per ASTM A743 (304 equivalent) with a slot cast in the lug to capture the band hem, long interlocking fingers allowing up to 0.40 inches of clamp range, and interchangeable design for combining smaller diameter clamps. The gasket is Nitrile (Buna-N) per ASTM D2000 with a full 360° gridded face, tapered ends for complete circumferential sealing, and a temperature range of -20°F to +180°F. The bridge plate is Type 304 Stainless Steel quarter-hard per ASTM A240, 20 gauge, molded and recessed into the gasket for uniform distribution of gasket pressure over the entire pipe circumference. Bolts are Type 304 Stainless Steel GR. 8 per ASTM A193, 5/8”-11UNC × 6.88” long Track Head Oval Neck, with epoxy-coated rolled threads for improved physical characteristics and smooth surface finish. Nuts are Type 304 Stainless Steel GR. 8 per ASTM A194, fluoropolymer coated to prevent galling, 5/8”-11UNC Heavy Hex Semi-Finished. Washers are Type 304 Stainless Steel per ASTM A240, 5/8” Type A Plain.
Designed for nominal pipe sizes from 2” through 12” with standard band widths of 7.5”, 15.0”, and 22.5” (widths up to 30” available on request). Working pressure is 125 PSI for 3”–10” nominal pipe sizes and 100 PSI for 12” nominal pipe size. Compatible with carbon steel, stainless steel, ductile iron, and aluminum pipe.
The Smith-Blair 258 repair clamp meets applicable D.O.T. Title 49 Section 192 regulations. Copper electrical conductor buttons are available for most 200 Series Full Circle Repair Clamps for gas service applications.
Specifications
Notes
*Please visit the Resources page on our website to view the High Density Polyethylene Pipe (HDPE) guide with more specific information on how to use our products on HDPE pipe.
