Screw pipe clamp D2 series

metalstainless steelheavy-duty

Product description
The Mathey Dearman Sturdi Clamp is a chain clamp designed for alignment and reforming of schedule 40 and lighter wall pipes, as well as elbows, tees, flanges and end caps. One clamp covers a wide diameter range (1–72 in / 33.4–1,828.8 mm) depending on configuration. Available with nickel-plated carbon steel chain or stainless steel chain; jackscrews, jackbars and main block are stainless steel. High-rise jackbars and main block allow reforming on both sides of the weld gap and permit welding around the full pipe circumference with the clamp in place.

Features and Advantages

• Precision alignment – Double jackscrews positioned around the outside diameter provide alignment and reforming accuracy to within 0.5 mm for internal or external diameters.
• Reformability – Reforming capability on both sides of the weld joint for schedule 40 pipe; aligns various wall schedules, elbows, tees and fittings.
• Adaptable – Chain design allows alignment and reforming of elbows, tees and fittings not manageable with cage clamps; one chain clamp can replace multiple cage clamps.
• High-rise independent jackbars – ‘High-rise’ double jackscrew jackbars provide extra clearance for welding torch/rod; each jackscrew has independently pivoting feet for uneven surfaces.
• Wide range – Single clamp models cover broad pipe size ranges depending on part configuration.
• Safe – When used with the level and support device (sold separately), elbows, tees and fittings are held securely during alignment.

Included with each Sturdi Clamp

• Nickel-plated carbon steel or stainless steel duplex roller chain
• Stainless steel single or double jackscrew jackbars (quantity per specifications)
• Stainless steel main block
• Jackscrew breaker bar and socket
• Heavy-duty storage box
• Parts and operating manual

Applications / Notes
Typical fit-up examples are provided by the manufacturer. Each clamp is supplied with necessary accessories for standard fit-ups and a steel storage box. The level and support device is not included and must be purchased separately. Calculations are based on pipe tensile strength of 45,000 psi (3,168 kg/cm²).

Technical specifications

• Model name: Sturdi Clamp (Sturdi Pipe Chain Clamp)
• Manufacturer / Brand: Mathey Dearman
• Invented: 1930
• Material options: nickel-plated carbon steel chain or stainless steel chain; stainless steel jackscrews, jackbars and main block
• Pipe size coverage: one clamp covers a wide range; specific part numbers cover the ranges listed below
• Part configurations (examples): D250-SC | 4 jackbars | 1–12 in (25.4–304.8 mm) | reforms/aligns to schedule 40/80 | DA-600S jackbar | DA-100 main block | DA-300 chain
• D250-SCSS | 4 | 1–12 in (25.4–304.8 mm) | 40/80 | DA-600S | DA-100 | DA-300S
• D249-SC | 7 | 4–20 in (101.6–508 mm) | 40/80 | DA-600S | DA-100 | DA-300
• D249-SCSS | 7 | 4–20 in (101.6–508 mm) | 40/80 | DA-600S | DA-100 | DA-300S
• D235-SCSS | 8 | 10–36 in (254–914.4 mm) | 40/80 | DB-600S | DB-100 | DB-300S
• D236-SCSS | 13 | 10–54 in (254–1,371.6 mm) | 40/80 | DB-600S | DB-100 | DB-300S
• D237-SCSS | 16 | 10–72 in (254–1,828.8 mm) | 40/80 | DB-600S | DB-100 | DB-300S
• Note: configurations marked with * (SCSS) are suitable for stainless steel
• Accessories: level and support device (sold separately)