Part name

Material

Pros & Cons

Cover plate

AL6063

Good plasticity, moderate heat treatment strength, good welding performance and gorgeous color on the surface after anodizing treatment, but not fireproof

Q235-A

Good toughness and plasticity, certain elongation, hot workability.

Stainless steel

Stainless steel contains chromium, strong corrosion resistance, smooth appearance and metallic luster. But the hardness is poor, not wear-resistant and the price is high..

Coaming

AL6063

Good plasticity, moderate heat treatment strength, good welding performance and gorgeous color on the surface after anodizing treatment.

Q235-A

Good toughness and plasticity, certain elongation, hot workability. Welding performance is weak than Q235-B

Stainless steel

Stainless steel contains chromium, strong corrosion resistance, smooth appearance and metallic luster. But the hardness is poor, not wear-resistant and the price is high.

Lock

SUS304

Sturdy and not easy to damage, and resistant to seawater corrosion

Q235

Good welding performance, Good low temperature toughness

Sealing

Neoprene rubber

Excellent Watertight performance

Butadiene rubber

Excellent oil resistance, abrasion resistance and air tightness

Clip

SS304

rustproof, less brittle

Q235

Good toughness and plasticity, certain elongation, hot workability.

Other manufacturer’s low quality oiltight hatch

HI-SEA high quality oiltight hatch

1. The material used for hatch plate has high carbon content, low hardness and thin brittleness.
2. The hatch surface improper handling, not anti-rust, and the appearance is not beautiful.
3. The handle is made of cheap carbon steel, which is easy to rust and damage and has high maintenance cost.
4. The sealing material has poor flexibility and is prone to deformation, fracture and corrosion.
5. The welding process of the parts is not good, the service life of the hatch cover is shortened, and brittle fracture may occur seriously.

1. The hatch cover plate is made of high-quality steel and aluminum with a solid and stable structure.
2. The hatch cover has excellent welding technology and long service life.
3. The use of high-quality sealing materials, good sealing performance and not easy to deform.
4. The hardware parts are made of high-quality stainless steel 316, which is strong and resistant to corrosion.
5. The certificate of each classification society is complete, which can meet the different needs of customers.
6. The product provides installation instructions.