DOUBLE JACKSCREW SINGLE CHAIN CLAMP 10-36 STAINLESS STEEL

Double Jackscrew Single Chain Clamp 10"–36" — Stainless Steel

When your application demands precision pipe alignment and reforming without any risk of carbon steel contamination, this Double Jackscrew Single Chain Clamp in stainless steel is the correct tool for the job. Engineered for use on stainless steel, duplex stainless, super duplex and specialty alloy pipework — where even trace contact with carbon steel components can cause corrosion, discolouration or weld procedure non-compliance — this clamp is fully constructed with stainless steel chain, jackbars, jackscrews and main blocks throughout.

Covering pipe diameters from 10 to 36 inches (254–914mm), it delivers the full capability of the double jackscrew design — precise Hi-Lo elimination, Schedule 40 reforming, full weld access without clamp removal, and fitting alignment for elbows, tees and flanges — in a configuration that meets the strictest material purity requirements across petrochemical, food and beverage, pharmaceutical, dairy, marine and high-purity industrial pipeline applications.

Fully Stainless Steel Construction — Zero Carbon Contamination

Every contact component that touches the pipe — chain, jackbars, jackscrews, pivoting pads and main blocks — is manufactured from stainless steel. This eliminates the risk of iron particle transfer that can occur with carbon steel clamps, preventing the surface contamination that leads to corrosion pitting, heat tint variation and weld procedure failures on stainless steel and specialty alloy pipe. For applications governed by stringent material traceability and contamination control requirements, this is not optional — it is a specification requirement.

Double Jackscrew Precision for Hi-Lo Elimination on Both Sides

Each jackbar carries two independently operable jackscrews with individually pivoting pads, allowing the operator to apply precise reforming pressure to the high points on both sides of the weld joint simultaneously. This independent control is critical for achieving the tight Hi-Lo tolerances required by welding procedure specifications in high-purity and pressure-critical pipeline systems — where misalignment can directly compromise weld integrity, corrosion resistance and service life.

Reform and Align Without Removing the Clamp

The jackbar geometry provides clearance around the weld joint, allowing the complete weld to be executed with the clamp in place. This prevents any joint movement between tack welding and full pass completion — maintaining precise alignment throughout the entire weld cycle and significantly reducing the risk of fitup deviation in critical applications.

One Clamp, Eight Cage Clamp Ranges

A single stainless chain clamp covers the full pipe range of eight cage clamps from 10 to 36 inches, providing exceptional versatility across variable pipe diameters without requiring multiple tool investments. For contractors and fabricators working across varied pipe schedules on stainless steel pipeline projects, this adaptability directly reduces capital expenditure and simplifies site equipment management.

Fitting Alignment Device for Elbows, Tees and Flanges

The included Fitting Alignment Device extends the clamp's capability to elbows, tees, flanges and other pipe fittings — allowing them to be accurately aligned, supported and secured for welding in stainless steel and specialty alloy applications where contamination-free fitup is equally important for fittings as for straight pipe joints.

Level and Support Device Included

The 10–36" size is supplied with a Level and Support Device, allowing pipe and fittings to be safely and securely held during alignment and welding — reducing reliance on auxiliary supports and improving safety and stability throughout the fitup process.

What's Included

• Stainless steel chain (length for the full pipe range)
• Extra heavy-duty stainless steel jackbars (8)
• Stainless steel main blocks
• Two fine adjustments
• Fitting Alignment Device
• Level and Support Device
• Jackscrew wrench
• Operating instructions and manual
• Metal storage box

Key Specifications

Industry Applications

The Weldmax OTSC-1036SS is essential tooling for stainless steel and specialty alloy pipeline fabrication across food and beverage, dairy, pharmaceutical, petrochemical, marine, offshore, desalination, water treatment, power generation and high-purity process piping applications — wherever carbon steel contamination of stainless or specialty alloy pipe cannot be tolerated.

Frequently Asked Questions:

What is the Weldmax Double Jackscrew Single Chain Clamp Stainless Steel? The Weldmax OTSC-1036SS is a fully stainless steel double jackscrew single chain clamp for aligning and reforming pipe from 10 to 36 inches (254–914mm). All contact components — chain, jackbars, jackscrews, pivoting pads and main blocks — are stainless steel, making it suitable for stainless steel, duplex and specialty alloy pipe applications where carbon contamination must be eliminated.

Why use a stainless steel chain clamp instead of a standard carbon steel chain clamp? When working with stainless steel, duplex stainless or specialty alloy pipe, contact with carbon steel tools and clamp components can transfer iron particles to the pipe surface. These particles can cause rust staining, corrosion pitting and surface contamination that compromises the corrosion resistance of the weld joint and may constitute a procedure non-compliance. A fully stainless steel chain clamp eliminates this contamination risk entirely.

What is the difference between the Weldmax OTSC-1036 steel and OTSC-1036SS stainless steel chain clamps? Both clamps are functionally identical in design, pipe range (10–36"), jackbar count (8), reforming and alignment capability (Schedule 40 reform, Schedule 80 alignment) and included accessories. The sole difference is material: the OTSC-1036SS uses stainless steel chain, jackbars, jackscrews and main blocks throughout, while the standard OTSC-1036 uses carbon steel jackbars and chain. The stainless steel version is required for applications on stainless or specialty alloy pipe where carbon contamination is unacceptable.

What pipe schedules can the OTSC-1036SS reform and align? The clamp reforms pipe to Schedule 40 and aligns all pipe wall schedules including Schedule 80, based on pipe with a tensile strength of 45,000 psi (3,168 kg/cm²).

Can the stainless steel chain clamp be used for elbows and tees? Yes. The included Fitting Alignment Device allows elbows, tees, flanges and other pipe fittings to be accurately aligned and secured for welding in stainless and specialty alloy applications — applications that standard cage clamps cannot accommodate.

Can the full weld be completed without removing the clamp? Yes. The double jackscrew jackbar design provides clearance around the weld joint, allowing the complete weld pass to be executed with the clamp in place — preventing joint movement and maintaining alignment integrity throughout the full weld cycle.