Double Jackscrew Chain Clamp
General Information
Mathey Dearman’s Double Jackscrew Chain Clamp reforms Schedule 40 pipe on either side of the joint to be welded. It is also able to exert pressure on the high points of both sides to eliminate “Hi-Lo.” The Chain Clamp’s Level and Support Device allows the pipe, elbow, tee, flange and other fittings to be held securely in place during alignment and welding. Pipe with wall thicknesses up to Schedule 80 can be aligned with the Double Jackscrew Chain Clamp. Mathey Dearman Double Jackscrew Chain Clamps are available in carbon steel chain and stainless steel chain versions to fit pipe from 1” to 54” (25 mm to 1372 mm) in diameter. Although all Mathey Dearman Chain Clamps feature stainless steel Jackscrews, Jackbars and Main Blocks, stainless steel chain should be used on stainless steel or specialty alloy applications to avoid potential contamination.
FEATURES:
EXTRA WELDING CLEARANCE: Jackbar design provides additional clearance, so the weld can be easily completed with clamp in place
PRECISE ALIGNMENT: Double Jackbars, spaced around the diameter of the pipe allow reforming on both sides of joint to within 1/64" (.4mm)
HEAVY DUTY: Aligns pipe with wall thickness up to Schedule 80
STRONG: Reforms pipe with wall thickness to Schedule 40
WIDE RANGE: Support, align, and reform elbow, tees, and other fittings that cage clamps can’t; one Chain Clamp covers the range of 8 cage clamps
VERSATILE: With the standard Level and Support Device, the clamp can be configured to align, reform and support almost any type of fitting for welding
BENEFITS:
One Chain Clamp covers the range of 8 cage clamps
Pipe and fittings can be fully welded with clamp in place
Jackscrew contact points swivel to protect against marring the pipe
Optional Spacing Screws available to assist in setting weld gap
An add-on Jackbar can be added when additional reforming pressure is need.
Double Jackscrew Chain Clamp Includes:
Nickel plated carbon steel or stainless steel duplex roller chain
Stainless steel Double Jackscrew Jackbars - quantity as indicated in specifications
Stainless steel Main Block
Level and Support Device
Jackscrew Wrench
Heavy-duty Storage Box
Parts and Operating Manual
Specifications
*Calculations are based on pipe with a tensile strength of 45,000 lbs per square inch / 3,164 kg per square centimeter
SS - Indicates clamp includes stainless steel chain. All clamps equipped with stainless steel Jackbars, Jackscrews, and Main Blocks.
