Product Name: High-Pressure Piping U-Bolt (Part No. 20498280)

Description:
This component is a U-bolt specifically designed for securing high-pressure (HP) piping in waterjet cutting systems. The "350" designation typically indicates the pipe size or fitting specification, often corresponding to a 3/8-inch or similar HP tubing size. The U-bolt serves as a mechanical clamping device that wraps around high-pressure tubing and mounts to a bracket or support structure, providing vibration dampening and preventing movement of the rigid stainless steel HP lines.

Manufactured from corrosion-resistant material such as stainless steel or zinc-plated carbon steel, the U-bolt includes a threaded saddle plate and nuts. By securely fastening the HP line to the machine frame, it reduces mechanical stress on the tube end fittings, prevents fretting wear from vibration, and maintains proper alignment of the high-pressure water circuit.

This component is a critical part of the high-pressure piping support system, ensuring that rigid HP tubes do not fatigue or crack due to movement or vibration during continuous intensifier pump operation. It is compatible with standard waterjet systems operating at 60,000–90,000 PSI (approximately 4,137–6,200 bar) .

Applications:

• Secures high-pressure tubing along the waterjet machine's gantry, Z-axis, or pump manifold

• Provides vibration dampening for rigid HP lines, reducing fatigue failure at fittings

• Prevents tube movement that could cause fretting wear against machine components

• Used during initial machine assembly and maintenance when HP piping is replaced

• Compatible with standard 3/8-inch HP tubing in 60K–94K waterjet systems 

Features:

• Corrosion-Resistant Material: Stainless steel or zinc-plated construction for durability in wet waterjet environments

• Precision Sizing: Machined to exact dimensions for secure grip on specified HP tubing size without crushing the tube

• Vibration Dampening: Helps absorb pulsation from the intensifier pump, reducing stress on tube fittings

• Threaded Saddle Plate: Includes matching nuts and plate for secure, repeatable clamping force

• Direct OEM Replacement: Interchangeable with standard waterjet HP piping support hardware

Maintenance:

Failure Diagnosis (When to Inspect/Replace):

• Visible Corrosion: Rust on the U-bolt, nuts, or saddle plate compromises clamping force and structural integrity

• Thread Damage: Stripped, galled, or corroded threads prevent proper tightening and secure clamping

• Tube Movement: If HP tubing can be moved by hand within the U-bolt, the clamp is loose or worn

• Cracking: Any visible cracks in the U-bolt or saddle plate require immediate replacement

• Vibration Wear: Signs of fretting or abrasion on the tube surface at the clamping point indicate the U-bolt may be overtightened or incorrectly positioned

Inspection and Replacement Guidelines:

• Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, bleed down all high-pressure lines, and follow lockout/tagout procedures. High-pressure water can cause severe injury if released during maintenance 

• Visual Inspection: During routine machine checks, inspect all HP piping U-bolts for corrosion, thread damage, or looseness

• Torque Compliance: Tighten U-bolt nuts to the specific torque value listed in the equipment service manual. Over-tightening can crush or deform HP tubing; under-tightening allows movement and vibration wear

• Proper Positioning: Ensure the U-bolt is positioned over a straight section of tubing, not over a bend or fitting

• Use Soft Cushions (If Applicable): Some HP piping support systems include a rubber or plastic cushion between the U-bolt and tube to prevent abrasion. Inspect and replace cushions if worn

• Replace if Damaged: Replace the U-bolt immediately if threads are damaged, the saddle plate is cracked, or corrosion is extensive

• Vibration Monitoring: If the machine exhibits new or excessive vibration, inspect all HP piping supports for looseness or wear

• Cross-Reference Information: The "350" designation corresponds to a standard HP tubing size; verify compatibility with your specific piping diameter before replacement