Marine Weathertight Hatch Cover - Marine Hatch - Hi-sea

Marine Weathertight Hatch Cover

Marine Weathertight Hatch Cover

Introduction

Weathertight means that water should not penetrate into the ship under any wind and wave conditions. The tightness requirement of weathertight is lower than that of watertight. The closing devices of various openings on the freeboard deck and enclosed superstructures and enclosures, as well as the bulkhead deck or its upper deck, are required to be weathertight.


Configuration selection

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.

Q235-A

Good toughness and plasticity, certain elongation, good weldability and hot workability

Q235-B

Good welding performance, Good low temperature toughness

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, good weldability and hot workability

Q235-B

Good welding performance, Good low temperature toughness

Lock

SUS304

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

Q235-B

Good welding performance, Good low temperature toughness

Sealing

Neoprene rubber

Excellent Watertight performance

Butadiene rubber

Excellent oil resistance, abrasion resistance and air tightness

Hinge

SS304

rustproof, less brittle

Q235-A

Good toughness and plasticity, certain elongation, good weldability and hot workability

Q235-B

Good welding performance, Good low temperature toughness

Copper H62

good mechanical properties and easy to weld, but it is prone to corrosion and cracking.

Options according to user requirements

Parts

Remark

Features

Clips

Wing clips

Single side opening

Wedge clips

Double side opening

Wheel

Quick action

Hinge position

Long side, short side, four side equivalent


Comparison Difference

Other manufacturers low quality hatch


HI-SEA high quality hatch




1. The steel plate has high carbon content, low hardness, and the steel plate is thin and brittle.
2. The surface of the hatch cover is not handled properly, and the shape is not beautiful.
3. The handle is made of cheap carbon steel, which is easy to rust and damage, and the maintenance cost is high
4. The sealing material has poor flexibility and is easy to deform, fracture and corrode.
5. Poor welding process of components will shorten the service life of the hatch cover, and may cause brittle fracture in severe cases.

1. Using high-quality carbon structural steel, the structure is firm and stable.
2. The hatch cover has excellent welding technology and long service life
3. High-quality sealing material is used, which has good sealing performance and is not easy to deform.
4. The hardware components are made of high-quality stainless steel 316, which is strong and corrosion-resistant.
5. The certificates of each classification society are complete, which can meet the different needs of customers.
6. The product provides installation instructions.


Drawing & Specifications


type name structure hinge position
A Single side opening butterfly clip A four sides equivalent
AL long sides equivalent
AS short sides equivalent
B double sides opening wedge  clip B four sides equivalent
BL long sides equivalent
BS short sides equivalent
C quick action center rotation  clip
Type A

type

nominal size

L*B

clear size L1*B1*R1 Cover size L2*B2

cover thickness

t

Hatch butterfly clip weight kg
t H dia qty

A


AL


AS

450*630 420*600*100 508*688 4 4,6

100

150

200

250

450

600

M16 4 24.4
512*692 6 6,8 31.1
516*696 8 8,11 37.7
530*530 500*500*100 588*588 4 4,6 24.2
592*592 6 6,8 30.8
596*596 8 8,11 37.4
630*630 600*600*100 682*682 4 4,6 M20 31
692*692 6 6,8 39.8
696*696 8 8,11 48.5
630*830 600*800*100 688*688 4 4,6 37.4
692*892 6 6,8 48.5
696*896 8 8,11 59.7
830*830 800*800*100 888*888 4 4,6 6 47.1
892*892 6 6,8 61.2
896*896 8 8,11 75.3
830*1230 800*1200*100 888*1288 4 4,6 8 65.2
892*1292 6 6,8 85.3
896*1296 8 8,11 800 175.2
1030*1030 1000*1000*100 1092*1092 4 4,6 146.6
1096*1096 8 6,8 190.9
1330*1330 1300*1300*100 1396*1396 8 8,11 331.3

Type B


type

nominal size

L*B

clear size L1*B1*R1 Cover size L2*B2

cover thickness

t

coaming butterfly clip weight Kg
t0 H

B

BL

BS

450*630 420*600*100 508*688 4 4,6

100

150

200

250

450

600

4 28.7
512*692 6 6,8 35.4
516*696 8 8,11 42
530*530 500*500*100 588*588 4 4,6 28.5
592*592 6 6,8 35.1
596*596 8 8,11 41.7
630*630 600*600*100 682*682 4 4,6 33.5
692*692 6 6,8 42.4
696*696 8 8,11 51.2
630*830 600*800*100 688*688 4 4,6 39.7
692*892 6 6,8 51.2
696*896 8 8,11 62.3
830*830 800*800*100 888*888 4 4,6 6 51.2
892*892 6 6,8 62.3
896*896 8 8,11 79.4
830*1230 800*1200*100 888*1288 4 4,6 8 71.4
892*1292 6 6,8 91.5


Type C


type

nominal size

L*B

clear size L1*B1*R1 Cover size L2*B2

cover thickness

t

coaming

centre rotation

clip

weight

Kg

t0 H
C 530*530 500*500*100 588*588 4 4,6

150

200

250

450

600

4 44.8
592*592 6 6,8 51.4
596*596 8 8,11 58
630*630 600*600*100 682*682 4 4,6 50
692*692 6 6,8 58.7
696*696 8 8,11 67.5
Φ530 500 588 4 4,6 42.2
592 6 6,8 47.5
596 8 8,11 52.8
Φ630 600 688 4 4,6 46.1
692 6 6,8 63.2
696 8 8,11 60.2
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Our mail: hs@cqhisea.com

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