porthole/side scuttle

-meet SOLAS ,ISO 9001-2008 -weathertight and antirust -can provide: ABS GL LR KR NK CCS DNV BV --fast delivery -customized

Main material of porthole

B	TYPE	material
		Main frame	Glass holder/ Glass pressure ring	Deadlight
	Bolted type	brass	brass	brass
		steel	Steel	brass
		Aluminum	aluminum	aluminum
	Welded type	Steel	brass	steel
		steel	steel	steel
		Steel	aluminum	aluminum

clips ,hinges and nuts should made of the material have the following quality

1 anticorrosion

2 have no effect on the anticorrosion ablility of other parts

3

TYPE	clips , hinge pins		nuts
	The lowest tensile strength(N/sqm)	The lowest elongation(%)	The lowest tensile strength(N/sqm)	The lowest elongation(%)
A	350	20	250	14
B	350	15	250	14
C	250	14	180	8

requirement

1 The porthole have good ability of weather tight and enough strength.

2 The porthole are clean and smooth,the roughness(Ro) of surface should be less than 12.5um

3 The surface of spare parts don't have any cast flaws like chine ,slice and burning.The surface of casting don't have any flaws that will afect the toughness like sand holes ,air holes,chines and loose.

4 To guarantee the weater tight of the porthole ,the portholes use the rubber packing that resistant to sea water and UV.

5The porthole adopt the toughened safe glass with quality certificates.

6The steel spare parts of our porthole will carry out Hot-dip zinc processing according CB/Z 343.And the aluminum parts will carry out anodic oxidation processing according CB/Z.

ways of test

1Blunt water experiment

Installing the window,use nozzle(dia>12.5mm) carry out blunt water test with at least 250kPa,the distance between nozzle and porthole should be less than 1.5m. After testing,there should be no drop of water or any leakage phenomenon on the testing part.

2Hydraulic test

The portholes will be installed in the special hydraulic test box,carry out test by two ways as follow.After testing,there should be no drop of water or any leakage phenomenon on the testing parts.

TYPE	Test pressure kPa
	Porthole with glass, but keep the deadlight open	Porthole without glass, but keep the deadlight closed
A	150	100
B	75	50
C	35	-

3Mechanical Strength test.

Keep the porthole on the test machine(without glass,close deadlight),the punch should in the centre of deadlight ,according to the requirement of deadlight sturcture,can put a steel board(dia=100mm) between punch and porthole.The test pressure and device as follow .After test,the permanent deformation of deadlight should less thean 1% of the porthole clearing size.

TYPE	Test pressure kPa
A	240
B	120

inspection rules

1We will inspect the surface of every porthole accordingt to the requirement of GB/T 14413-93

2Carry out blunt water experiment to every porthole

3Carry out hydraulic test to 10% of every batch porthole.

package

Calcium corrugated box,or wooden box

the porthole should be clamped with correct methods,and equipped with soft cushion package materials

The mark on the surface of package should meet the requirement of GB 6638l

Specal Delivery

Update Date:2012-04-09 10:10:40

porthole/side scuttle