Climbing & Lifting Equipment Classification

1

Auxiliary device for climbing Pin

Pinφ40×90, 111.53.380.01

40Cr Alloy Steel (Quenched and Tempered)

1. High-frequency alternating load leading to fatigue cracking; 2. Inadequate lubrication causing dry friction and abrasive wear; 3. Eccentric load due to installation misalignment resulting in local stress concentration and deformation.

1. Conduct pre-installation alignment inspection to ensure coaxiality of the matching hole and pin, with coaxiality error not exceeding 0.02mm; 2. Apply high-temperature resistant molybdenum disulfide lubricant every 200 working hours; 3. Avoid overloading beyond 120% of the rated load; 4. Regularly check for surface cracks using magnetic particle testing (MPT) every 6 months.

2

Pin

Pinφ30×80, 111.53.240.15

35CrMo Alloy Steel (Quenched and Tempered)

1. Corrosive wear caused by exposure to harsh environments (humidity, dust, chemicals); 2. Impact load during equipment start-stop leading to edge chipping; 3. Wear of matching copper sleeve causing increased pin friction.

1. Install rubber dust covers at both ends to prevent dust and moisture intrusion; 2. Avoid sudden start-stop and emergency braking to reduce impact load; 3. Check the matching gap with the copper sleeve regularly, and replace the copper sleeve in time when the gap exceeds 0.5mm; 4. Apply anti-corrosive grease to the surface before long-term storage.

3

Pin shaft

Pin shaftφ20×80, GB882-86(φ20×80)

45# Carbon Steel (Quenched and Tempered)

1. Shear failure caused by exceeding the rated shear force; 2. Wear at the cotter pin hole due to repeated disassembly and assembly; 3. Thermal deformation in high-temperature working environments.

1. Strictly follow the rated load parameters, and conduct shear force testing before use in high-load scenarios; 2. Use special tools for disassembly and assembly to avoid damaging the cotter pin hole; 3. When working in environments above 150℃, pre-check the thermal stability of the material and shorten the inspection cycle to 3 months; 4. Ensure the cotter pin is fully inserted to prevent axial movement of the pin shaft.

1

Clip

Clip 60×φ30×φ3, 111.53.00.03

Stainless Steel 304

1. Fatigue cracking caused by repeated bending and tension in dynamic load scenarios; 2. Corrosion due to exposure to rain, seawater, or chemical agents; 3. Wear at the contact surface with cables/pipes due to relative movement.

1. Avoid installing the clip at the bending position of cables/pipes to reduce repeated stress; 2. For marine or chemical environments, conduct monthly corrosion inspections and apply anti-corrosive spray; 3. Ensure the contact surface is clean and free of burrs before installation to reduce abrasive wear; 4. Check the clamping force regularly, and re-tighten if the torque decreases by more than 10%.

2

Clip

Clip 80×φ40×φ4, 111.53.240.16

Stainless Steel 316

1. Deformation caused by over-tightening during installation; 2. Pitting corrosion due to chloride ion erosion in coastal areas; 3. Wear caused by friction with hard debris in construction sites.

1. Use a torque wrench to control the tightening torque within the range specified by the product (15-20 N·m); 2. In coastal areas, choose a protective cover for the clip to isolate it from seawater spray; 3. Clean the working environment before installation to remove hard debris; 4. Replace the clip immediately if pitting corrosion with a depth exceeding 0.3mm is found.

3

Cotter pin

Cotter pin 5×45, GB91-87(5×45)

Carbon Steel Q235 (Galvanized)

1. Fatigue fracture caused by repeated vibration; 2. Galvanization layer damage leading to rust; 3. Bending fatigue at the bending part due to improper installation angle.

1. Ensure the bending angle of the cotter pin is 45-60 degrees during installation to avoid excessive stress; 2. Check the galvanization layer for damage before use, and apply anti-rust paint if damaged; 3. In high-vibration scenarios (such as lifting machinery), replace the cotter pin every 3 months; 4. Avoid using pliers with excessive force during bending to prevent micro-cracks.

4

Cotter pin

Cotter pin 3×16, GB91-87(3×16)

Carbon Steel Q235 (Galvanized)

1. Shear failure due to exceeding the rated shear force; 2. Rusting caused by long-term exposure to humidity; 3. Wear at the insertion end due to repeated insertion and removal.

1. Match the cotter pin specification with the pin shaft hole size to avoid overload; 2. Store unused cotter pins in a dry and ventilated environment to prevent rust; 3. Use a chamfered tool to process the insertion end if it is worn to avoid damaging the pin shaft hole during installation; 4. Do not reuse cotter pins that have been bent more than twice.

5

Bolt

Bolt M12×80, GB31.1-88(M12×80-6.8)

Alloy Steel 40Cr (Heat Treated)

1. Fatigue loosening caused by equipment vibration; 2. Thread wear due to improper installation (cross-threading); 3. Hydrogen embrittlement caused by improper electroplating process; 4. Corrosion in harsh environments.

1. Use lock washers or thread locking adhesive to prevent loosening in high-vibration scenarios; 2. Ensure the bolt and nut threads are clean and free of debris before installation, and use a torque wrench for precise tightening; 3. Choose bolts with qualified electroplating processes, and avoid using them in environments with hydrogen sulfide; 4. Regularly inspect the bolt surface for corrosion and thread damage, and replace if necessary.

6

Nut

Nut M12, GB6178-86(M12-8)

Alloy Steel 40Cr (Heat Treated)

1. Thread stripping caused by over-tightening; 2. Corrosion leading to thread seizure; 3. Wear at the bearing surface due to repeated tightening and loosening.

1. Control the tightening torque within the specified range to avoid thread overload; 2. Apply anti-seize lubricant to the threads in high-temperature or corrosive environments; 3. Check the bearing surface for flatness regularly, and replace the nut if there is obvious wear; 4. Avoid mixing nuts of different materials or specifications.

7

Washer

Washer 12, GB93-87(12)

Spring Steel 65Mn

1. Elastic fatigue caused by repeated compression; 2. Deformation due to over-compression; 3. Corrosion leading to loss of elasticity.

1. Do not stack multiple washers to avoid reducing elastic performance; 2. Ensure the compression amount does not exceed 30% of the washer's thickness; 3. Choose galvanized or stainless steel washers for corrosive environments; 4. Replace washers in batches every 6 months in high-frequency use scenarios.

1

Lifting line

111.53.382.00

High-Strength Polyester Fiber (With Steel Core Reinforcement)

1. Abrasive wear caused by friction with sharp edges of heavy objects; 2. Fatigue damage due to repeated bending and stretching; 3. Aging and strength reduction caused by exposure to sunlight and high temperature; 4. Chemical corrosion in harsh environments.

1. Use protective sleeves at the contact points with sharp edges; 2. Avoid bending the line at a small radius (minimum bending radius ≥ 10 times the line diameter); 3. Store the line in a cool and dry environment away from direct sunlight, and replace it if it has been used outdoors for more than 1 year; 4. Avoid contact with oils, acids, and alkalis, and clean the line with neutral detergent if contaminated.

2

Pulling line

111.53.383.00

High-Strength Nylon Fiber (With Anti-Static Coating)

1. Wear caused by friction with the ground or other hard surfaces during traction; 2. Static electricity accumulation leading to damage in flammable and explosive environments; 3. Overloading leading to fiber breakage; 4. Moisture absorption leading to increased weight and reduced strength.

1. Use a line roller to reduce friction with the ground during traction; 2. Ensure the anti-static coating is intact before use in flammable and explosive environments, and test the static conductivity regularly; 3. Strictly follow the rated load, and do not use the line for lifting heavier objects than specified; 4. Dry the line thoroughly before storage if it gets wet, and check for fiber delamination.

3

Basic line

111.53.384.00

Steel Wire Rope (Galvanized, 6×19S+FC)

1. Wear of wire strands caused by friction with sheaves and pulleys; 2. Rusting due to moisture and humidity; 3. Fatigue breakage of wire strands due to repeated bending; 4. Damage caused by improper lubrication.

1. Check the sheave and pulley grooves regularly to ensure they match the wire rope diameter, and replace worn grooves in time; 2. Apply anti-rust lubricating grease to the wire rope every 1 month, especially in humid environments; 3. Avoid repeated bending at the same position, and rotate the wire rope regularly to distribute the load; 4. Replace the wire rope if the number of broken wires in any 100mm length exceeds 5.

1

Lifting tackle

HYD-1

Shell: Carbon Steel Q355; Internal Components: Alloy Steel 40Cr

1. Wear of internal gears and bearings due to insufficient lubrication; 2. Shell deformation caused by impact load; 3. Corrosion of internal components due to moisture intrusion; 4. Jamming caused by foreign debris entering the internal structure.

1. Fill the internal cavity with lithium-based grease every 3 months, and replace the grease completely every 6 months; 2. Avoid lifting heavy objects with impact, and use a buffer device if necessary; 3. Check the sealing performance of the shell regularly to prevent moisture and debris intrusion; 4. Conduct a no-load test before use to ensure smooth operation, and disassemble and inspect if there is any jamming.

2

Sheave

Sheaveφ150, 111.53.380.03

Sheave Body: Ductile Iron QT450-10; Groove Surface: Hard Chrome Plated

1. Wear of the groove surface caused by friction with the steel wire rope; 2. Wear of the inner hole due to friction with the pin shaft; 3. Corrosion of the surface caused by harsh environments; 4. Crack caused by overloading.

1. Check the groove surface regularly for wear, and replace the sheave if the wear depth exceeds 1mm; 2. Apply lubricating oil between the sheave inner hole and the pin shaft every 2 weeks; 3. Clean the sheave surface regularly, and apply anti-corrosive paint to the non-chrome-plated parts; 4. Strictly follow the rated load, and conduct non-destructive testing (NDT) for cracks every year.

3

Copper sleeve

Copper sleeveφ40/φ20, 111.53.380.04

Bronze CuSn6Zn6Pb3

1. Abrasive wear caused by friction with the pin shaft; 2. Seizure caused by insufficient lubrication; 3. Corrosion caused by moisture and chemicals; 4. Deformation caused by excessive interference during installation.

1. Ensure sufficient lubrication between the copper sleeve and the pin shaft, and use graphite-impregnated copper sleeves for high-temperature scenarios; 2. Check the fitting interference during installation, which should be controlled within 0.02-0.05mm; 3. Avoid using the copper sleeve in environments with strong acids and alkalis; 4. Replace the copper sleeve if the inner diameter wear exceeds 0.5mm.

1

Draw ring

111.53.380.02

Alloy Steel 35CrMo (Quenched and Tempered)

1. Fatigue cracking caused by repeated alternating load; 2. Wear at the connection point with the lifting line; 3. Corrosion caused by harsh environments; 4. Damage caused by side load.

1. Avoid applying side load to the draw ring, and ensure the load direction is along the central axis; 2. Check the connection point with the lifting line regularly for wear, and use a wear-resistant sleeve if necessary; 3. Conduct magnetic particle testing (MPT) for cracks every 6 months; 4. Apply anti-corrosive grease to the surface in humid or corrosive environments.

2

Safety hook

111.53.386.00

Alloy Steel 40CrNiMoA (Heat Treated)

1. Wear of the hook mouth caused by repeated contact with heavy objects; 2. Failure of the safety latch due to spring fatigue; 3. Corrosion leading to reduced strength; 4. Deformation caused by overloading.

1. Check the hook mouth opening regularly; replace the hook if the opening increases by more than 10% of the original size; 2. Inspect the safety latch spring for elasticity every month, and replace the spring if it fails to reset; 3. Use a protective cover for the hook in harsh environments, and conduct corrosion inspection regularly; 4. Strictly follow the rated load, and do not use the hook to lift objects beyond the rated weight.

3

Turnbuckle

Turnbuckle C0.9, GB651-65(C0.9)

Body: Carbon Steel Q235; Screws: Alloy Steel 45#

1. Thread wear caused by repeated adjustment; 2. Seizure of threads caused by corrosion; 3. Bending deformation of the body caused by over-tightening; 4. Fatigue cracking at the connection points.

1. Apply anti-seize lubricant to the threads before use, and clean the threads regularly; 2. Avoid over-tightening, and use a torque wrench to control the tightening force; 3. Check the body and connection points for cracks regularly, and replace if any; 4. Store the turnbuckle in a dry environment to prevent thread corrosion.

1

Sand barrel frame

111.53.380.05

Carbon Steel Q235 (Welded, Powder Coated)

1. Weld cracking caused by impact load; 2. Deformation caused by uneven stress; 3. Corrosion of the frame surface due to exposure to rain and humidity; 4. Wear at the contact points with the sand barrel.

1. Avoid impact on the frame during transportation and installation; 2. Ensure the frame is placed on a flat surface to avoid uneven stress; 3. Check the powder coating for damage regularly, and touch up with anti-corrosive paint if damaged; 4. Add rubber pads at the contact points with the sand barrel to reduce wear.

2

Pipe

111.53.380.06

Seamless Steel Pipe 20#

1. Corrosion caused by moisture and external environment; 2. Deformation caused by external impact; 3. Wear at the connection points with the frame; 4. Internal rusting caused by moisture intrusion.

1. Seal both ends of the pipe with end caps when not in use to prevent moisture intrusion; 2. Avoid collision with hard objects during transportation and installation; 3. Check the connection points with the frame regularly for wear, and replace the connecting parts if necessary; 4. Apply anti-corrosive paint to the pipe surface every year.

3

Sand barrel

111.53.385.00

High-Density Polyethylene (HDPE) With Reinforced Ribs

1. Crack caused by impact or drop; 2. Aging and brittleness caused by long-term exposure to sunlight; 3. Damage caused by contact with sharp objects; 4. Deformation caused by excessive sand pressure.

1. Avoid dropping the sand barrel during transportation and filling; 2. Store the sand barrel in a shaded area when not in use to avoid UV aging; 3. Keep the working environment clean to avoid contact with sharp objects; 4. Do not overfill the sand barrel, and control the filling amount within 90% of the barrel volume.