Smith-Blair Style 281 Full Circle Repair Clamp - Wide Range, 3-12 in
Smith-Blair Style 281 Full Circle Repair Clamp - Wide Range, 3-12 in

Smith-Blair Style 281 Full Circle Repair Clamp - Wide Range, 3-12 in

Nominal Size - OD: 3 in - 3.46-4.04 in OD
Width - Part No.: 7.5 in - 281-00035007-000

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$268
SKU: 281-00035007-000
Weight : 6.0 lb
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Description
Smith-Blair · Repair Clamp
Style 281 Full Circle Wide Range Repair Clamp
All Stainless Steel, Fabricated Lugs, Single Band
150 PSI Max Working Pressure
Nitrile (Buna-N) Gasket
All 304 Stainless Steel
Fabricated Stainless Lugs
NSF/ANSI 61 and 372
3.46-14.39 in Pipe OD
6-48 lb Weight
Description

The Smith-Blair Style 281 Full Circle wide range repair clamp has double the OD range of the standard 261 — the widest range repair clamp in the Smith-Blair line — so fewer clamp sizes cover more pipe. It repairs leaks from complete breaks, splits and holes, or joins pipes of the same diameter.

Application: leaks from complete breaks, splits and holes, and joining pipes of the same diameter.

Key Features

  • Working pressure up to 150 PSI
  • Up to 0.95 in of OD range per clamp
  • All 304 stainless construction; 316 stainless nuts
  • Standard widths 7.5 through 30 in; keeper bar closes the clamp during installation
  • Certified to NSF/ANSI 61 and NSF/ANSI 372
What Ships and What It Needs to Run

Included: the clamp with its 360° Nitrile gasket, fabricated lugs, keeper bar, studs, nuts and washers.

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 per ASTM A240
Finger and lug bar Type 304 stainless steel per ASTM A240
Keeper bar Type 304 stainless steel per ASTM A240
Gasket Nitrile (Buna-N) per ASTM D2000
Studs Type 304 stainless steel per ASTM A276, epoxy coated to minimize galling
Nuts Type 316 stainless steel Gr 8 per ASTM A194, fluoropolymer coated
Washers Type 304 stainless steel per ASTM A240

Materials subject to change by the manufacturer.

Pipe Applications

Carbon steel, stainless steel, ductile iron, PVC, asbestos cement, copper and aluminum.

Sizes
Pipe size and OD Widths
3 in - 3.46-4.04 in 7.5, 10, 12.5, 15 in
4 in - 4.45-5.14 in 7.5, 10, 12.5, 15 in
4 in - 4.75-5.45 in 7.5, 10, 12.5, 15, 20 in
6 in - 6.56-7.36 in 7.5, 10, 12.5, 15, 20, 25, 30 in
6 in - 6.83-7.63 in 7.5, 10, 12.5, 15, 20, 25, 30 in
8 in - 8.54-9.34 in 7.5, 10, 12.5, 15, 20, 25, 30 in
8 in - 8.99-9.79 in 7.5, 10, 12.5, 15, 20, 25, 30 in
10 in - 10.64-11.54 in 7.5, 10, 12.5, 15, 20, 25, 30 in
10 in - 11.34-12.24 in 7.5, 10, 12.5, 15, 20, 25, 30 in
12 in - 12.62-13.57 in 7.5, 10, 12.5, 15, 20, 25, 30 in
12 in - 13.44-14.39 in 7.5, 10, 12.5, 15, 20, 25, 30 in

Choose the pipe OD in the first row above; the part number shows in the second row.

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.
  • Tighten from the center nut 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-008 (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.
For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Style 281 Installation Instructions Style 281 Spec Sheet Style 281 Datasheet
Videos

Product videos are being added to this listing. For a walkthrough in the meantime, email sales@watermainsupply.com.

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