JCM Industrial Installation Instructions Manual.pdf

Tricks of the Trade for Installation Models 101 and 102 Universal Clamp Couplings

Years of fi eld experience, special applications and product testing have revealed many subtleties regarding application and installation of repair clamps. For maximum performance under adverse conditions take advantage of the JCM “Tricks of the Trade.” • Always clean and lubricate pipe with water or soapy water. This helps overcome friction when rotating the clamp to smooth the gasket. Do not use oil base pipe lubricant; the oil does not disperse, leaves residue and prevents the gasket from sealing/adhering to the pipe wall. Use water solvent lubricant. Use of a mirror will assist inspection of backside of pipe or pipe in cramped, limited space.

• Place a reference mark on the pipe back from the damaged area to help in centering clamp over break. Clamps provide maximum performance when centered over damage area.

• For installation on pipe under pressure: lubricate the clamp gasket with soap/water mixture, assemble clamp on the pipe beside the damaged area, lightly engage bolts and slid the clamp over the damaged area, ensure tapered gasket lays fl at without curl or fold, proceed with installation steps. • Breaks involving de fl ected pipe require a wider clamp. JCM lugs will articulate, permitting clamp to better conform to pipe. • Damage involving large holes or massive pitted areas - use stainless steel plate over large holes (under repair clamp) to provide the gasket a surface to seal against. • Drill holes in the ends of splits or cracks to relieve forces which could cause splits to continue. • Clamp performance drops when gap between pipe ends is larger than 1/2”. Use a stainless steel spacer to fi ll or to place over gap. • When repairing holes, gouges or centralized damage, position the bolting lug over the damaged area to provide additional gasket com- pression at the location. • Leave su ffi cient pressure on a broken line to prevent intrusion of foreign matter to prevent excessive line contamination.

• With pressure reduced, spraying water will cease as soon as water level rises above break. • Lubricating clamp bolts will ease clamp installation and assure proper torquing of bolts.

Making Larger Clamp From Smaller Clamps Longer than normal gasket tapers permit joining of Universal Clamp Couplings of like width and type to make a larger clamp. For instance, a nominal size 6” and 8” clamp can be joined to make a 14” clamp. This provides you with “on hand” capability to make repairs on larger pipe sizes. Contact JCM Industries for speci fi cs.

• Determine which clamps are available to make needed clamp, usually 2 or 3 clamps are su ffi cient. It is recommended that clamps to be joined be not more than one nominal size apart. Join clamps with ranges that when combined include O.D. of pipe to be repaired. For Example: Required clamp is 14” to fi t 16.44 O.D. Combining a 101-0905-12 (range 8.99 to 9.39) and a 101-0690-12 (range 6.84 to 7.25) will make a clamp with a range of 15.84 to 16.64. • Prior to joining clamps, reduce the curvature of the recessed bridge plate (as shown in photo) to slightly less than curvature of pipe to be repaired. This is done by laying bridge plate between two 2” x 4”’s and hitting with a small sledge hammer.

• Install as a multi-band clamp, making sure to tighten bolts evenly keeping gaps between lugs approximately even.

For application review or questions contact JCM Industries at 1-800-527-8482, 903-832-2581 www.jcmindustries.com

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