Bureau of Ships manual

MISSING IMAGE

Material Information

Title:
Bureau of Ships manual
Uncontrolled:
Manual of engineering instructions
Physical Description:
1 v. (loose-leaf) : ill. ; 24 cm.
Language:
English
Creator:
United States -- Navy Dept. -- Bureau of Ships
Publisher:
U.S. G.P.O.
Place of Publication:
Washington, D.C
Publication Date:
Frequency:
updated as needed

Subjects

Subjects / Keywords:
Warships -- Design and construction   ( lcsh )
Naval architecture   ( lcsh )
Genre:
federal government publication   ( marcgt )

Notes

Statement of Responsibility:
United States Navy.
Numbering Peculiarities:
Chapter 40 changed titles between 1942 and 1948, chapter 58 split into 2 parts between 1942 and 1948.
General Note:
A collection of chapters from the Bureau of Ships manual, and the Manual of Engineering Instructions, meant to be updated.
General Note:
Includes indexes.

Record Information

Source Institution:
University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 004822825
oclc - 34257060
lccn - 2010229042
System ID:
AA00008539:00001

Full Text
240o


11Ma


BUREAU


OF


CHAPTER


ESS OPE

Navy Depart


16


meant,


Bureau of Ships,


1 April


1950.


This chapter


Manual,


Chapter


a revision
16, "Access


of Bureau of Ships
Oueninrs." dated 1


August 1946.
This revised chapter becomes effective upon re-
ceipt and shall be inserted in its proper place in
the Manual Binder.
DI). H. CLARK,


Bear


Admiral,


U. S. N.,


Chief


of Bureau.


APPROVED:
FRANCIS P. MATTHEWS,
Secretary of the Navy.


NAVSHIPS 250-000-16


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Digitized by the Internet Archive


in 2011


with funding from


University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation












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Chapter


ACCESS


OPENINGS


16-1. INSPECTION AND MAINTENANCE OF CLOSURES
The following procedure should be followed in


regard


to the inspection


and maintenance


closures:


integrity


fittings such


of the vessel.


Polishing


of galvanized


as dogs, dog bolts, nuts, hinges, etc.,


with emery paper or other abrasives


is prohibited


as this destroys the zinc coating and accelerates


(a) Wipe off all dirt,


grease,


and foreign matter


corrosion.


with a wiping cloth, dampened if necessary with
carbon tetrachloride or kerosene.
(b) Scrape rust off all parts of closure.
(c) Clean contact surface only of dog and dog
wedge with steel wool and wipe both surfaces with


an oily cloth, leaving


a thin film of oil for lubrica-


tion.
(d) Clean rust and paint off knife edge contact
surface with 00 emery cloth.
(e) Remove all paint and rust from rubber gasket.


It should be clean and pliable.


replacement,
chapter 95.
stock.


replace


with


If gasket requires


material


specified


Gasket material is available in standard


(f) Examine all moving parts for


damage.


necessary,


excess


wear or


install replacement parts.


For quick-acting doors, consult manufacturer's in-
struction book in this regard.
(g) Operate closure and check for smooth and
positive dogging action.
(h) Check compression between knife edge and
rubber gasket and adjust if necessary.
(i) Lubricate teeth of gear sectors, racks, pinions,
ratchets, pawls, cranks, etc., of quick-acting closures.
(j) Repack dog and operating lever or handwheel
spindles with packing, N. D. Spec. 33P29, symbol


1425.


This material is available in standard stock.


(k) Repaint


as necessary, being careful not to


apply paint to gasket or knife edge.
16-2. DOGS, PINS, ETC., NOT TO BE REMOVED
The dogs, dog bolts, nuts, hinges, and hinge pins
or other parts of watertight doors, hatches, man-
holes, and air ports upon which the watertight se-
curity of vessels depends shall not be removed except


for the purpose of repair or adjustment.


The re-


moval of these parts for other purposes, such as
cleaning or pohlishing, or for making access temporar-
ily more convenient, is prohibited, as this practice
often results in the loss of the parts or results in
their replacement without being correctly adjusted,.
thereby introducing a menace to the watertight


16-3. THREADS OF DOG BOLTS NOT TO BE FILED
The threads of dog bolts shall not be polished with
files, emery, or sandpaper, as this practice in time


wears away


the threads causing


the bolts and nuts.


a loose fit between


Composition and corrosion-


resisting steel bolts require only wiping occasionally


with an oily rag or waste.
and slightly slushed with he


Steel bolts, if kept clean


grease,


will not rust.


16-4. GASKETS NOT TO BE PAINTED
The foregoing instructions in regard to avoiding
use of paint on gaskets apply also to gaskets as used
in manholes and hatches for oiltight purposes. In
setting up oiltight gaskets, care should be taken to
see that these are in suitable condition for obtaining


tightness.


If replacement of gaskets is required,


replace with material specified in chapter 95.
16-5. PRECAUTIONS IN CLOSING DOORS. ETC.
When setting up dogs on watertight doors, hatches,
etc., a dog on the opposite side from the hinges
should first be set up with sufficient pressure to hold


the door, hatch, etc., closed.


Two dogs should then


be set up snugly on the hinge side, after which all
the dogs should be set up evenly to insure a bearing


all around.


When loosening


dogs in


watertight


doors, hatches, etc., those dogs nearest the hinges
should be loosened first; this prevents the door from
springing and makes it easier to operate the remain-
ing dogs.
16-6. TIGHTENING DOOR DOGS
If the door, hatch, etc., are in good condition, it
should only be necessary to have an even bearing all


around in order to obtain tightness.


This bearing


should be obtained by setting up dogs firmly and
evenly all around, beginning as instructed above.
Dogs should not be driven down. The necessary
tightness should be obtained by setting up a little on
one after the other, successively, until all are down
firmly.


880495-40


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