JCM 121 Gas Repair Clamp - product photo
JCM 121 Gas Repair Clamp - alternate view
JCM 121 Gas Repair Clamp - product photo
JCM 121 Gas Repair Clamp - alternate view

JCM 121 Gas Repair Clamp - USDOT 192 Full Circle Clamp, 1-1/2 to 12 in

Nominal Size - OD Range: 1-1/2 in - 1.88-2.15 in OD
Width - Part No.: 6 in - 121-0190-6

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$129.63
SKU: 121-0190-6
Weight : 7.0 lb
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Description
JCM Industries · Gas Repair Clamp
JCM 121 Gas Repair Clamp
USDOT 192 · Ductile iron lugs, stainless band · 1.88-13.50 in pipe OD
100 PSI Gas to 8 in, 60 PSI 10-12 in
Meets USDOT Code 192
-40°F to +180°F Temperature
Buna-N (NBR) Gasket
304 Stainless Band
Ductile Iron Lugs
Low-Alloy Steel Bolts
1.88-13.50 in Pipe OD
7-80 lb Weight
Description

The JCM 121 gas repair clamp meets USDOT Code 192 and gives an immediate repair, temporary or permanent, of breaks, cracks, splits, corroded areas, pin holes and similar damage on gas lines. The full-circumference gasket seals the whole pipe, and the stainless band conforms to flat and uneven pipe exteriors.

Heavy-duty high-strength ductile iron lugs with mutually supporting sliding fingers carry high bolt torque into the gasket; oval-neck track bolts lock in the canted ears.

Typical application: Repair, temporary or permanent: breaks, cracks, splits, holes, corroded areas and pin holes; connection of plain-end pipe.

Key Features

  • Meets USDOT Code 192
  • 1/4 in thick gridded gasket on 3 in and larger fills pits and voids
  • Molded-in stainless bridge plate prevents pinched gasket
  • Drop-in, swing-away bolts with no loose parts; bolts replace individually
  • Suitable for reshaping and marking squeeze-off locations
What Ships and What It Needs to Run

Included: the clamp with its full-circumference gasket and molded-in stainless bridge plate, ductile iron lugs and drop-in track bolts with nuts and washers.

Pipe anchorage, provided at install. The clamp seals but does not restrain the pipe.

Genuine JCM Industries equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
12-Month Warranty

Covered for 12 months from the date of purchase against defects in materials and workmanship. Keep the dated invoice as proof of purchase.

Working Pressure

100 PSI gas on 2-8 in; 60 PSI gas on 10-12 in. JCM's installation instructions rate the clamp for gas service at 100 PSI on cast iron and steel pipe through 8 in and 60 PSI on 10 and 12 in. Higher capability depends on the application; send us the pipe, damage and pressure for JCM's rating.

Materials Specifications
Band 18-8 Type 304 stainless steel, heavy gauge; 17 gauge on 10 in and larger
Lugs Ductile iron, ASTM A536 60-40-18
Bolts Corrosion-resistant low-alloy steel per ASTM A242, ANSI A21.11, AWWA C111: 5/8 in on 2-8 in, 3/4 in on 10-12 in; heavy hex nuts
Gasket NBR (Buna-N) per ASTM D2000, for natural gas, oil, mild acids, bases, water and sewage; gridded, tapered lap ends, 1/4 in thick on 3 in and larger
Bridge plate Type 304 stainless steel, molded into the gasket
Temperature -40°F to +180°F
Coating Corrosion-resistant shop-coat primer

From the JCM gas repair and service clamp specifications and industrial manual.

Pipe Applications

Cast iron and steel pipe in gas service (not polyethylene gas pipe). Line contents JCM lists: natural gas, methane, air and vacuum, chemical and acid, cooling water, potable water and wastewater, slurry and process lines.

Sizes

15 OD ranges from 1.88 to 13.50 in. Open the table for every range and width.

All 15 OD ranges
Nominal Pipe OD range Widths
1-1/2 in 1.88-2.15 in 6, 12 in
2 in 2.35-2.63 in 6, 7.5, 12, 15 in
2-1/4 to 2-1/2 in 2.70-3.13 in 6, 7.5, 12, 15 in
3 in 3.46-3.70 in 6, 7.5, 12, 15 in
3 to 4 in 3.73-4.13 in 6, 7.5, 12, 15 in
4 in 4.45-4.75 in 6, 7.5, 12, 15, 18, 24, 30 in
4 in 4.74-5.14 in 6, 7.5, 12, 15, 18, 24, 30 in
6 in 6.56-6.96 in 6, 7.5, 12, 15, 18, 24, 30 in
6 in 6.85-7.25 in 6, 7.5, 12, 15, 18, 24, 30 in
8 in 8.54-8.94 in 7.5, 12, 15, 18, 24, 30 in
8 in 8.99-9.39 in 7.5, 12, 15, 18, 24, 30 in
10 in 10.60-11.00 in 7.5, 12, 15, 18, 24, 30 in
10 in 11.04-11.44 in 7.5, 12, 15, 18, 24, 30 in
12 in 12.60-13.02 in 7.5, 12, 15, 18, 24, 30 in
12 in 13.10-13.50 in 7.5, 12, 15, 18, 24, 30 in

Select the nominal size and OD range, and the width; the part number shows with the width.

Bolt Numbers
Clamp width 6 in 7.5 in 12 in 15 in 18 in 24 in 30 in
Bolts 2 2 4 4 6 8 10

Bolt size: 5/8 in through 8 in nominal; 3/4 in on 10 in nominal and larger, except the 7.5 and 15 in widths, which use 5/8 in bolts. From the JCM size tables.

Before You OrderConfirm the pipe OD before ordering.
For cast iron and steel gas mains; JCM does not use the 120 and 150 gas clamp series on polyethylene gas pipe.
Anchor the pipe: the clamp seals the full circumference but does not hold the pipe against lateral movement, so JCM calls for proper anchorage wherever the pipe could move out of the clamp.
For a submittal, email sales@watermainsupply.com with the pipe OD, pipe type, gas pressure and line content.
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
JCM 121 Gas Repair Clamp Data Sheet
Videos

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

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