What influence does the rivet diameter have on the use of containers?

Influence of rivet diameter on container use (divided into stress, waterproof, plate, processing and cost)

Commonly used containers: φ3.2, φ4.0, φ4.8 and φ6.4 are four mainstream specifications.

First, the diameter is too small (too small)

Mechanical hidden trouble

The cross-sectional area of nail rod is small, and the shear and tensile bearing capacity is insufficient; Container traffic bumps, rivets are pulled off after hoisting vibration, plates are cracked, skin bulges and edges become warped, door panels and side panels are loose and leaking.

Example: φ4.0 should have been misused by the side plate of φ4.8, and it is easy to lose nails and leak water when shipping for a long time.

Small borehole diameter

Sheet riveting is easy to pull through the iron sheet, and the nail hole tears at the high stress position.

Sealing variation

The diameter of the nail head cap is small, the area of the compressed sealing strip/waterproof pad is insufficient, and rainwater seeps into the door frame and the door crack.

Second, the diameter is too large (the specification is too large)

Damage box steel plate

There are more than 1.6 ~ 2.0 mm thin steel plates on the container side plates, and the large diameter (φ6.4) has a large hole diameter. After drilling, the strength of the base material hole decreases and the edge is easy to collapse, and the plate surface is depressed and wrinkled by the nail head during riveting.

Rising processing cost

The unit price of drill bit and rivet is high, and the rivet gun has large load and fast loss; Punching hours increase, and mass production efficiency decreases.

Limited space

Narrow bending groove, door frame stop, lining position, big nail head protruding, interfering with the assembly of insulation board and rubber strip.

Third, the actual use of various specifications.

1.φ3.2 (small nail)

Only suitable for interior panels, shutters and PVC accessories; Used in the outer skin → the strength is seriously insufficient, and it is loose and leaking for a short time.

2.φ4.0 (small and medium nails)

Small supports and accessories; The main skin can't be spliced, and the vibration resistance can't meet the container shipping standard.

3.φ4.8 (main force of container standard)

Cap diameter and nail rod strength match 1.6/2.0mm box steel plate, the rubber strip is pressed tightly, and the bump resistance is the best, and the side plate, top plate and door frame are universal.

4.φ6.4 (big nail)

Only thick stiffeners, corner pieces and thick plate supports are allowed; Improper use of thin skin will crush the board surface, increase the aperture and accelerate the corrosion.

Four, anti-corrosion, corrosion level influence

The nail diameter is too small: the nail hole is repeatedly deformed by force, and the gap becomes larger. When water vapor and salt spray are drilled into the hole, the nail hole will rust and enlarge the hole first;

Excessive nail diameter: the hole break is large, the damaged area of sprayed antirust coating is large, and the salt spray environment at the seaside corrodes and spreads from the hole edge.

V. Summary of Simple Selection

Outer skin, door panel, and sealing position: fix φ4.8 (change small instability and change big damaged plate).

Internal nonmetallic lining: φ3.2/φ4.0.

Thick material reinforcement: φ6.4