Escaping System Equipment Classification

1

U-bolt M24

Escaping system U-bolt M24, 111.53.492.00

Alloy Steel 35CrMo (Quenched and Tempered, Hot-Dip Galvanized)

1. Fatigue cracking caused by long-term alternating stress from wind vibration and personnel escaping impact; 2. Corrosion of the galvanized layer due to marine salt spray or industrial corrosive gases, leading to base metal rust; 3. Thread wear caused by improper installation (cross-threading) or repeated disassembly; 4. Bending deformation caused by over-tightening or uneven stress.

1. Conduct pre-installation stress testing to ensure uniform force distribution, and use a torque wrench to control the tightening torque within 450-500 N·m; 2. For marine or industrial corrosive environments, conduct monthly galvanized layer inspections, and touch up with anti-corrosive paint immediately if damage is found; 3. Ensure threads are clean and free of debris before installation, and apply anti-seize lubricant to reduce wear during disassembly; 4. Conduct magnetic particle testing (MPT) for fatigue cracks every 6 months, focusing on the bolt bending part.

2

Slotted nut M24

Slotted nut M24, GB6178-86(M24-8)

Alloy Steel 40Cr (Heat Treated, Black Oxide Coated)

1. Thread stripping caused by over-tightening or mismatched bolt specifications; 2. Corrosion of the oxide coating leading to thread seizure; 3. Wear of the slot caused by repeated insertion and removal of cotter pins; 4. Deformation caused by impact load during emergency escaping.

1. Strictly match with M24 bolts of the same material grade, and avoid mixing with non-standard bolts; 2. Apply anti-rust oil to the threads regularly in humid environments to prevent seizure; 3. Use special tools to insert and remove cotter pins to avoid damaging the nut slot; 4. Check the nut slot for deformation and thread integrity after each emergency drill, and replace immediately if any damage is found.

3

Flat washer 24

Flat washer 24, GB93-87(24)

Spring Steel 65Mn (Heat Treated, Zinc Plated)

1. Elastic fatigue caused by repeated compression and release during personnel escaping; 2. Corrosion leading to loss of elastic performance; 3. Deformation caused by uneven stress distribution; 4. Wear at the contact surface with nuts/bolts due to vibration.

1. Do not stack multiple washers to ensure effective load distribution; 2. Replace washers in batches every 12 months or after 50 emergency drill uses, whichever comes first; 3. Ensure the installation surface is flat and free of debris to avoid uneven stress; 4. Store unused washers in a dry and ventilated environment to prevent zinc layer corrosion.

4

Cotter pin 5×40

Cotter pin 5×40, GB91-86(5×40)

Carbon Steel Q235 (Galvanized)

1. Fatigue fracture at the bending part caused by long-term vibration; 2. Galvanization layer damage leading to rust; 3. Shear failure caused by exceeding the rated shear force due to improper installation; 4. Wear at the insertion end due to repeated disassembly.

1. Ensure the bending angle is 45-60 degrees during installation to avoid excessive stress concentration; 2. Replace the cotter pin immediately if the galvanization layer is damaged or rust is found; 3. Match the cotter pin specification with the slotted nut slot size to avoid overload; 4. Do not reuse cotter pins that have been bent more than twice, and use new cotter pins after each disassembly.

5

Shackle

Shackle, S-BX4.75

Alloy Steel 40CrNiMoA (Heat Treated, Powder Coated)

1. Fatigue cracking at the bow and pin connection caused by repeated load-bearing during escaping; 2. Corrosion of the powder coating in humid environments leading to base metal rust; 3. Wear of the pin thread caused by repeated adjustment; 4. Deformation of the bow caused by side load or overloading.

1. Strictly use the shackle in the vertical load direction, and avoid applying side load (side load should not exceed 10% of the rated load); 2. Check the powder coating for damage every month, and touch up with anti-corrosive paint if necessary; 3. Apply anti-seize lubricant to the pin thread before use, and clean the thread regularly; 4. Conduct non-destructive testing (NDT) for cracks every 6 months, and replace the shackle immediately if any crack is found.

1

Escaping machine (GERONIMO)

Escaping machine (GERONIMO), 111.53.490.00

Shell: Carbon Steel Q355 (Welded, Anti-Corrosive Coated); Internal Gears/Bearings: Alloy Steel 20CrMnTi (Carburized and Quenched); Brake Components: Friction Material (Asbestos-Free)

1. Gear wear and bearing damage caused by insufficient lubrication; 2. Brake failure due to friction material wear or contamination; 3. Corrosion of internal components due to moisture intrusion; 4. Mechanical jamming caused by foreign debris entering the shell; 5. Overload damage caused by exceeding the rated carrying capacity.

1. Conduct regular lubrication maintenance every 3 months: replace the gear oil completely, and apply grease to the bearing positions; 2. Check the friction material thickness every 6 months, and replace if the thickness is less than 3mm; keep the brake system clean, and avoid oil contamination; 3. Inspect the shell sealing performance regularly to prevent moisture and debris intrusion; 4. Strictly follow the rated carrying capacity (not exceeding the specified number of personnel/weight), and conduct load testing every year; 5. Perform no-load and load test runs every month to ensure smooth operation and reliable braking.

2

Turnbuckle M27

Turnbuckle M27, GB651-65(M27)

Body: Carbon Steel Q235 (Hot-Dip Galvanized); Screws: Alloy Steel 45# (Heat Treated)

1. Thread wear and seizure caused by corrosion and lack of lubrication; 2. Bending deformation of the body caused by over-tightening during tension adjustment; 3. Fatigue cracking at the screw-body connection caused by wind vibration; 4. Damage caused by improper adjustment leading to uneven tension.

1. Apply anti-seize lubricant to the threads before use, and clean and re-lubricate the threads every 3 months; 2. Use a torque wrench to control the tightening torque during adjustment, and avoid over-tightening (maximum torque not exceeding 600 N·m); 3. Check the connection points for cracks regularly using visual inspection and tapping tests; 4. Adjust the turnbuckle evenly to ensure the tension of the connecting lines is balanced, and mark the standard adjustment position to avoid excessive adjustment; 5. In marine or corrosive environments, increase the inspection frequency to monthly and replace the turnbuckle if severe corrosion is found.

1

Pulling line

Pulling line, 111.53.493.00

High-Strength Polyester Fiber (With Steel Core Reinforcement, Anti-UV Coated)

1. Abrasive wear caused by friction with pulleys, shackles, and other metal components; 2. UV aging leading to brittleness and strength reduction due to long-term outdoor exposure; 3. Fatigue damage caused by repeated bending and stretching during escaping; 4. Chemical corrosion caused by contact with industrial pollutants; 5. Cutting damage caused by contact with sharp edges.

1. Install wear-resistant sleeves at the contact points with metal components to reduce friction; 2. Replace the pulling line if it has been used outdoors for more than 2 years, or if obvious UV aging (such as discoloration, brittleness) is found; 3. Avoid bending the line at a small radius (minimum bending radius ≥ 15 times the line diameter) to reduce fatigue damage; 4. Clean the line with neutral detergent regularly to remove industrial pollutants; 5. Inspect the line surface for cuts and wear every month, and replace immediately if the wear depth exceeds 10% of the line diameter.

2

Basic line

Basic line, 111.53.494.00

Steel Wire Rope (Galvanized, 6×37S+FC, Anti-Corrosive Grease Coated)

1. Wear of wire strands caused by friction with pulleys and sheaves; 2. Rusting caused by galvanization layer damage and moisture intrusion; 3. Fatigue breakage of wire strands caused by repeated bending; 4. Damage caused by improper lubrication; 5. Kinking and deformation caused by improper storage and transportation.

1. Check the pulley and sheave grooves regularly to ensure they match the wire rope diameter (groove diameter should be 1.05-1.1 times the wire rope diameter), and replace worn grooves in time; 2. Apply anti-rust lubricating grease to the wire rope every month, especially in humid environments, and repair the galvanization layer with zinc-rich paint if damaged; 3. Rotate the wire rope regularly to distribute the load and reduce local fatigue; 4. Replace the wire rope if the number of broken wires in any 100mm length exceeds 6, or if obvious kinking and deformation are found; 5. Store the wire rope in a coiled state in a dry and ventilated environment, and avoid collision and extrusion during transportation.