Smith-Blair · Repair Clamp
Style 228 Full Circle Repair Clamp
Double and Triple Band, Large Diameter
150 PSI Max Working Pressure
-20°F to +180°F Temperature
Nitrile (Buna-N) Gasket
304 Stainless Bands
Epoxy-Coated Ductile Iron Lugs
Low-Alloy Steel Bolts
NSF/ANSI 61 and 372
14.38-30.72 in Pipe OD
35-205 lb Weight
Description
The Smith-Blair Style 228 Full Circle repair clamp is built for large-diameter pipe: double-band clamps from 14.38 to 23.65 in OD and triple-band clamps from 23.28 to 30.72 in OD. It repairs full circumferential breaks, holes, cracks and other damage with 18-8 Type 304 stainless bands, a 360° Nitrile gasket and removable epoxy-coated ductile iron lugs.
Application: cast iron, ductile iron, steel, asbestos cement, copper, aluminum, PVC, HDPE, fiberglass and other pipe types.
Key Features
- Working pressure up to 150 PSI
- Double band to 23.65 in OD, triple band to 30.72 in OD
- Widths 10, 15, 20 and 30 in
- Removable lugs and drop-in bolts for easier installation
- Certified to NSF/ANSI 61 and NSF/ANSI 372
What Ships and What It Needs to Run
Included: the clamp with its Nitrile gasket, lugs, bolts and nuts, ready to install.
Spring washers on HDPE pipe, ordered separately. Smith-Blair requires spring washers on HDPE applications; ask us to include them with the clamp.
Genuine Smith-Blair equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Smith-Blair Warranty
Smith-Blair warrants its products to be free of defects in materials and workmanship for one year from the date of shipment by Smith-Blair. Dated proof of purchase, such as a bill of sale, is required to establish eligibility. Smith-Blair will repair or, at its option, replace a defective product; the product is returned to the factory or warehouse Smith-Blair designates.
Working Pressure
Up to 150 PSI. Smith-Blair rates the allowable working pressure of a repair clamp to fall as pipe diameter rises; for a particular installation it is set by pipe size and type, the type and extent of the damage, service conditions and installation workmanship.
Materials Specifications
| Band |
Type 304 stainless steel |
| Lugs |
Ductile iron (ASTM A536 Gr 80-55-06) with Flexi-Coat fusion-bonded epoxy finish |
| Gasket |
Nitrile (Buna-N), compounded to resist water, acids, alkalies, most (aliphatic) hydrocarbons and many other chemicals |
| Bridge plate |
Type 304 stainless steel, recessed flush and bonded into the gasket |
| Bolts and nuts |
High-strength low-alloy steel bolts with heavy semi-finished hex nuts (ANSI B18.2.2) |
| Finish |
Flexi-Coat fusion-bonded epoxy |
Materials subject to change by the manufacturer.
Pipe Applications
Cast iron, ductile iron, steel, asbestos cement, aluminum, PVC, HDPE (with spring washers), fiberglass and other pipe types.
Sizes
20 pipe sizes from 14.38 to 30.72 in OD — open for the full list
| Pipe size and OD |
Widths |
| 14.38-15.13 in |
10, 15, 20, 30 in |
| 15.07-15.82 in |
10, 15, 20, 30 in |
| 15.92-16.67 in |
10, 15, 20, 30 in |
| 16.56-17.31 in |
10, 15, 20, 30 in |
| 17.15-17.90 in |
10, 15, 20, 30 in |
| 17.82-18.57 in |
10, 15, 20, 30 in |
| 18.46-19.21 in |
10, 15, 20, 30 in |
| 19.23-19.98 in |
10, 15, 20, 30 in |
| 19.90-20.65 in |
10, 15, 20, 30 in |
| 20.70-21.45 in |
10, 15, 20, 30 in |
| 21.52-22.27 in |
10, 15, 20, 30 in |
| 22.12-22.87 in |
10, 15, 20, 30 in |
| 22.90-23.65 in |
10, 15, 20, 30 in |
| 23.28-24.38 in |
10, 15, 20, 30 in |
| 24.38-25.48 in |
10, 15, 20, 30 in |
| 25.70-26.80 in |
10, 15, 20, 30 in |
| 26.48-27.58 in |
10, 15, 20, 30 in |
| 27.65-28.75 in |
10, 15, 20, 30 in |
| 28.73-29.83 in |
10, 15, 20, 30 in |
| 29.62-30.72 in |
10, 15, 20, 30 in |
Choose the pipe OD in the first row above; the part number shows in the second row.
Bolt Numbers
| Band width |
Double band bolts |
Triple band bolts |
| 10 in |
8 |
12 |
| 15 in |
12 |
18 |
| 20 in |
16 |
24 |
| 30 in |
24 |
36 |
Bolts 5/8 x 6 in and 5/8 x 6-7/8 in.
Installation Notes
- Clean the pipe where the clamp will sit, removing scale, dirt and debris that could spoil the gasket seal.
- Lubricate the pipe and gasket with a soap-and-water solution that meets the water and pipe supplier’s requirements.
- Where the pipe ends gap 1 in or more, bridge the gap with a short section of pipe or a thin strip of sheet metal to support the gasket.
- Where 40% or more of the circumference is broken away, cover the opening with sheet metal and use a clamp that extends 3 in past it on both sides.
- Engage the centermost bolts first and tighten from the center outward, keeping the clamp centered on the break; finish with a calibrated torque wrench to the torque in the instructions.
- Anchor the pipe: the clamp seals around it, and Smith-Blair requires proper anchoring to restrain pipe movement and prevent pull-out.
From Smith-Blair Installation Instructions TI-002 (Rev 08/26/21), in the Data Sheet tab.
Before You OrderAll Smith-Blair products are Made to Order and Non-Returnable.
Items typically shipped in 5 - 10 business days.
Odd pipe ODs, other widths and other materials are built to order — email sales@watermainsupply.com with the pipe OD and material.
