Hose Coupling Schools

1. Threading School - The Old Ox

Ultimate Move: Thread the outside of the pipe, tap the inside of the coupling, wrap it tightly with Teflon tape, and then twist it hard.
Specialized for: High-pressure water pipes (≥10 bar) and steam pipes.
Demolition Scene:
Out-of-the-field sewer pipe misaligned → Even wrapped like a mummy with Teflon tape, it still leaked;
Stainless steel pipes expand and contract with heat → Tighten when cold, break when hot and emit air.

2. Cam Locking School - The Quickshooter

Ultimate Move: Forcefully depress the cam lever to lock in 3 seconds.
Specialized for: Tanker truck unloading, farmland irrigation, and slurry transfer.
Suspicious Case Study:
Newbie mistakenly connects compressed air → Cam shatters upon unlocking, killing front teeth;
Aluminum teeth corroded by acid → Tooth roots fracture during acid removal in the middle of the night, resulting in a truck pickling operation. 

3. Quick-Insert Clamps - Embroidery Needles

Ultimate Move: Press the spring clip, insert it, and it locks with a click.
Specialized for: Pneumatic tools, fire hoses, and laboratory water pipes.
Rollover Scene:
Construction site dust jams a spring → Slash the pipe with a knife for emergency rescue;
Plastic clips are frozen brittle (-10°C) → Pressurized to break the head, fragments piercing the eyes.

4. Flange Clamps - Heavy Tanks

Ultimate Move: Bolt two metal plates through each other and tighten them until they deform.
Specialized for: Boiler steam pipes and hydraulic oil pipes (300 bar+).
Bitter Lessons:
Less Tightened One Bolt → High-Pressure Hot Oil Sprays in a Rainbow, Scalding Skin Off;
Rusty and Uneven Flange Surface → Inadequate Gasket Pressure, Leaks Unknown for Three Years.

5. Barb Clamps - Homemade Artifacts

Ultimate Move: Insert a metal barb into the hose and clamp it with wire.
Specialized for: Agricultural pumping, fish pond aeration, and temporary sewage disposal. Suicide attempts:
Barb too shallow (hook depth less than twice the pipe wall) → Water hammer knocks the pipe loose, soaking the entire village;
Plastic barb + gasoline pipe → Swelling and unhooking, causing widespread fire.

6. Quick-connect Rotating Pie - Nimble Snake

Killing trick: Male and female connectors with bearings rotate while pumping fluid to prevent kinks.
Specialized for: Concrete pump trucks, drilling rig hydraulic hoses, and marine oil transfer arms.
Situations of mishaps:
Sand in the bearing → Seizure and explosion of the seal, spraying hydraulic fluid ten meters;
Forgetting to install the anti-disengagement pin → The hose swivel connector flies off, shattering the windshield.