Regular Inspection and Condition Assessment
It is recommended to conduct a visual inspection monthly, focusing on checking for cracks, deformation, or corrosion on the clamp body. For high-temperature, high-pressure, or corrosive media environments, this should be shortened to weekly inspections.
The inspection standard should refer to GB/T 19228.3-2019 Pipe Supports and Hangers. If the crack depth exceeds 10% of the wall thickness or the deformation exceeds 5% of the original size, the clamp must be replaced immediately.
Special Environment Treatment: Under conditions of severe vibration, a laser rangefinder should be used to detect the clamp displacement, ensuring that the displacement deviation does not exceed ±2mm of the design value.
Cleaning and Corrosion Prevention Treatment
The cleaning process uses a neutral detergent with a pH of 6-8. Use a soft brush to wipe along the axial direction of the clamp, avoiding scratching the surface. For oil stains, steam purging with a special degreasing agent can be used, with the temperature controlled below 60℃.
Corrosion protection scheme is based on the ISO 12944-2018 environmental corrosion classification:
C3 (Medium corrosion): Hot-dip galvanizing, zinc layer thickness ≥ 65μm
C4 (High corrosion): Epoxy zinc-rich primer + polyurethane topcoat, total dry film thickness ≥ 200μm
C5 (Marine environment): 316L stainless steel pipe clamps.
Lubrication and Maintenance of Moving Parts
Lubrication cycle: Apply molybdenum disulfide grease to bolted connections quarterly, and inject lithium-based grease into rotating parts.
Torque control: Bolt preload must meet design values during installation, controlled using a torque wrench:
M12 bolts: 35-40 N·m
M16 bolts: 70-80 N·m
M20 bolts: 120-140 N·m
Vibration protection: Under vibration frequencies > 25Hz, rubber damping pads with a thickness of not less than 10mm must be installed.
