In modern industrial, municipal, and construction sectors, pipeline systems are hailed as the “lifelines.” As these pipelines operate long-term under high pressure, corrosive, high-temperature, or complex underground conditions, internal damage is prone to occur. Sewer cameras, as a non-destructive testing (NDT) tool, can delve deep inside for inspection without disassembly, serving as a core method for ensuring system safety.
Industrial Process Piping
In manufacturing and process industries, process piping handles material transport, heat exchange, and reaction control, with its internal condition directly impacting production efficiency.
• Chemical Piping: Focuses on detecting wall thinning, pitting, or weld cracking caused by highly corrosive media (e.g., acids, alkalis).
• Oil & Gas Pipelines: Inspects wax buildup, liquid accumulation, corrosion pits, and third-party construction damage in transmission lines and station internals.
• Pharmaceutical & Food-Grade Piping: Verifies the smoothness of sanitary stainless steel pipe interiors, weld quality, and checks for residues or microbial growth.
• High-Temperature Steam Piping: Evaluates oxide scale spalling inside boiler superheaters and reheaters to prevent clogging or pipe bursts.
• Materials & Requirements: Often stainless steel, carbon steel, or alloys; equipment must feature temperature resistance, corrosion resistance, and high cleanliness.
Municipal & Building Drainage Piping
Primarily used for assessing the structural integrity and operational status of underground pipe networks under trenchless conditions.
• Urban Storm/Sewer Networks: Checks for joint deformation, misalignment, leaks, or blockages caused by geological settlement.
• Building Stacks & Branch Drains: Locates clog points or leak sources inside high-rise residential or commercial complexes, avoiding extensive demolition.
• Materials & Requirements: Includes concrete, PVC, HDPE, or cast iron; often requires crawlers (robots) or long push rods for long-distance inspection.
HVAC Duct Systems
Critical for maintaining indoor air quality, with a focus on cleanliness and airtightness.
• Supply/Return Air Main Ducts: Inspects internal dust accumulation, mold, insulation detachment, or construction debris.
• Cleanroom Ducting: Verifies weld seams are smooth and burr-free to prevent particulate contamination.
• Smoke Exhaust Ducts: Assesses whether fire dampers reset properly after activation and checks for internal grease buildup (especially in food service venues).
• Requirements: Ducts vary in cross-section (round, rectangular); equipment needs side-view cameras to inspect blind spots.
Energy & Power System Piping
These pipelines demand extremely high safety standards, with drain camera inspection acting as a “sentry” for preventive maintenance.
• Nuclear Plant Primary Circuit Piping: During shutdowns, inspects stress corrosion cracks on internal surfaces of main pipes.
• Power Boiler Piping: Transports steam or water; checks for internal scaling, corrosion, and micro-cracks.
• Marine Fuel/Lubricant Lines: Investigates filter damage, metal debris accumulation, or abnormal internal wear.
• Requirements: Equipment must meet special certifications for explosion-proofing, radiation resistance, or low particulate release.
Special Equipment & Vessel Connecting Pipes
Suitable for complex, confined connecting components.
• Heat Exchanger Tube Bundles: Inspects individual U-tubes or straight tubes for internal corrosion, blockages, or vibration wear.
• Reactor Inlet/Outlet Pipes: Identifies catalyst residue, coking, or liner detachment.
• Hydraulic & Lubrication System Lines: Detects micro-contaminants like metal shavings or seal fragments.
• Requirements: Pipe diameters are often very small (<20mm), requiring probes with high flexibility and minimal bending radius.
Summary
In the context of modern industry’s pursuit of efficiency, safety, and intelligence, the sewer camera has become a crucial tool for ensuring the healthy operation of various complex systems.
