ASTM D14-23 Specification for Jacketed RubberLined Wire Hose for Public and Private Fire Department Use

Trang 1 STANDARD SPECIFICATIONS FOR COTTON RUBBER-LINED FIRE HOSE FOR PRIVATE FIRE DEPARTMENT USE.. These specifications apply to cotton rubber-lined hose for Covered.. a The jacket or

STANDARD SPECIFICATIONS

FOR COTTON RUBBER-LINED FIRE HOSE FOR PRIVATE

FIRE DEPARTMENT USE

Serial Designation: D 14-23

These specifications are issued under the fixed designation D 14; the final number indicates the year of original adoption as standard, or in the case of revision, the year of last revision

ADOPTED, 1915; RESUBMITTED AS TENTATIVE, 1921; ADOPTED IN AMENDED

FoRM, 1923

Material 1 These specifications apply to cotton rubber-lined hose for

Covered private use for fire protection purposes They cover the following

sizes: 1!-in single and double-jacketed; 2-in single and double jacketed; 2!-in single, double and triple-jacketed; 3-in double and triple-jacketed; 3~-in double and triple-jacketed

I MANUFACTURE

cotton 2 (a) The jacket or jackets shall be well, evenly and firmly

.Fabric made from good cotton, as free from unsightly defects, dirt, knots,

lumps and irregularities of twist as is consistent with good

(b) The cotton jackets shall be seamless and have the fillers woven around the hose throughout its length and the warps inter-woven with and covering the :fillers Where more than one jacket

is prescribed, they may be separate or interwoven

Rubber 3 (a) The lining shall be made a properly vulcanized rubber

Lining compound which will comply with all of the tests specified in Section 8

It shall consist of not less than three calendered sheets in one solid body and shall be lap-jointed with the lap as small and neat as is consistent with good results

(b) The lining shall be smooth and practically free from pitting and other imperfections and from corrugations

(c) The lining shall be of uniform thickness and not less than the lower limit nor more than the upper limit given in item (b) of Table I, exclusive of the backing

( 1074)

SERIAL DESIGNATION: D 14 - 23 1075

(d) The backing, if used, shall not exceed 0.028 in in thickness

It need not be of the same composition as the rubber lining, but the

adhesion between the rubber lining and the cotton jacket shall comply

with the test specified in Section 9

4 The hose shall be flexible and easily coiled Flexibility

5 The character of the workmanship shall be such as is incident

TABLE I

-Size and Number of Jaoketo

Single Double Single Double Single Double Triple Double Triple Double Triple

- - - · - - - -- -

-(a) Prescribed internal

di-1! 1!

ameter, in

(b) Thiokneas rubber lining,

in 0.040 0.049 0.049 0.049 0.058 0.058 0.058 0.058 0.058 0.072 0.072

to to to to to to to to to to to 0.065 0.065 0.065 0.065 0.072 0.072 0.072 0.072 0.072 0.095 0.095 (c) Test pressure on every

length, lb per sq in 300 400 300 400 300 400 400 400 400 400 400

(d) Bursting test pressure

(3-f~ samples) lb per

500 600 500 600 500 600 600 600 600 600 600

sq m

(e) Kink tea~ pressure, lb

250 300 250 300 250 300 300 250 250 250 250 per sq m

(f) ElongatiOn, per cent 13 9 13 9 13 9 9 9 9 9 9

(o) Twist, deg per ft 50 29 50 29 25 15 15 15 1& 15 15

(h) Rise, in 7 none 7 none 4 none none none none none none

(i) Weight, min., lb 21 29 40

Weight, max., lb 42 58 86 113 115 135

(j) Test pressure marking,

300 400 300 400 400 400 400 400 400

lb per sq in 300 400

II PHYSICAL PROPERTIES AND TESTS

6 The tests necessary to determine the physical properties which Standard

are prescribed in the following sections shall be made in accordance Methods

with the Standard Methods of Testing Rubber Products (Serial

Designation: D 15) of the American Society for Testing Materials

7 A sample not less than 8 in in length shall be taken from each Sampling

lot of 500 ft of hose or less for the tests specified in Sections 8 and 9

All test specimens shall be cut transversely from the sample

8 (a) The tensile strength shall be not less than 1600 lb per Tests of

sq in when tested one month or less from date of final vulcanization, R1uung .u~ber

and not less than 1200 lb per sq in when tested more than one

month but not over one year from date of final vulcanization

(b) The tensile strength after subjection to a dry heat of 158° F

(70° C.) ±2° F (1.1 ° C.) for a period of four successive days of 24

hours each shall be not less than 900 lb per sq in This test shall

be made within three months from date of final vulcanization

Friction Test

Hydrostatic

Pressure

Tests

Elongation

Twisting

Warping

Methods

1076 SPECIFICATIONS FOR FIRE HOSE (PRIVATE DEPARTMENT UsE)

(c) The elongation when rupture occurs in making the tension test (Paragraph (a) ) shall be such that the original 2-in gage length shall stret<;:h to not less than 12 in., when tested one month or less from date of final vulcanization, and not less than 10 in when tested more than one month but not over one year from date of final vul-canization

(d) The permanent elongation or set following a stretch from 2

to 10 in shall not exceed 25 per cent when tested one month or less from date of vulcanization When tested more than one month but not over one year from date of final vulcanization, it shall not exceed

25 per cent following a stretch from 2 to 8 in

9 The adhesion between the lining and the cotton jacket shall

be such that the rate of separation of the lining from the jacket shall

be riot greater than one inch per minute with a weight of 12 lb

10 (a) Each length of hose shall be subjected to the hydrostatic pressure specified in item (c) of Table I for five seconds without leaking in the hose or at the couplings or breaking any threads in the jacket

(b) A 3-ft sample in every lot of 3000 ft of hose or less shall, while lying either straight or curved to a radius of 27 in., withstand without failure the hydrostatic pressure specified in item (d) of Table I

(c) One full length in every lot of 500 ft of hose or less shall, while kinked, withstand without failure the hydrostatic pressure specified in item (e) of Table I applied for five seconds

11 The elongation of the hose when tested as prescribed in Section 10 (a) shall not exceed the percentage of the length measured under a pressure of 10 lb per sq in which is specified in item (f) of Table I

12 When tested as prescribed in Section 10 (a), the hose shall not twist more than the amount given in item (g) of Table I The twisting shall be in the direction which will tighten rather than loosen the couplings

13 When subjected to the test prescri]?ed in Section 10 (a), the hose shall not rise more than the distances specified in item (h) of Table I, from the level of the test table or test floor or warp more than

20 in from a straight line drawn from center to center of the couplings

III CHEMICAL PROPER TIES AND TESTS

14 The chemical tests required by the following chemical require-ments shall be made in accordance with the Standard Methods of Testing Rubber Products (Serial Designation: D 15) of the American Society for Testing Materials

SERIAL DESIGNATION: D 14-23 1077

15 Samples shall be taken both as regards number and location Sampling

at the discretion of the inspector

16 (a) In the analysis of the rubber lining, the acetone extract Analysis

shall not exceed 4 per cent; the alcoholic potash extract shall not ~~n~:.ber exceed I! per cent; the chloroform extract shall not exceed 2 per

cent; the ash shall be not less than SO per cent nor more than 57 per

cent; the total sulfur (excluding barytes) shall not exceed 4 per cent;

and the free sulfur shall not exceed li per cent All percentages

shall be by weight of the total compound

(b) The sum total of the results of the tests of the rubber lining

for acetone extract, alcoholic potash extract, chloroform extract, ash

and total sulfur (exclusive of barytes) shall not exceed 67 per cent

by weight of the total compound

IV DIMENSIONS AND WEIGHTS

17 The hose shall have an internal diameter of not less than Diameter

the diameter ordered and shall be furnished in lengths averaging 50 ft :~<k~:~.gth

18 The weight of each 50-ft length of hose complete with Weight

couplings shall be in acyordance with the amount specified in item (i) of Hose

of Table I

19 Couplings shall be of the type ordered but unless otherwise Type

specified, they shall conform to Sections 20 to 25, inclusive, and

20 The couplings shall be made, finished and fitted in a work-

Workman-manlike manner throughout The inside diameter throughout the sD~ip antd

couplmgs shall be not less than the nommal mside diameter of the hose

to which they are connected

21 The couplings shall be of the expansion-ring pattern, of ample Type and

strength, and of the best form to resist the stress of expanding the Dimensions

binding ring in the coupling, and shall have a tail part sufficiently

long to extend l in beyond the end of the expansion ring The ring

shall be at least Ii in in length

22 The couplings shall be made of an alloy of copper, tin and Chemical

zinc (and lead if desired) of the following proportions: Composition

Copper • not under 83 per cent

Tin • • • : • " " 5 "

Zinc " over 7

Lead • •.•.•• • " " 3 ·~

23 The weight of complete couplings, including male and Weight

female ends, swivel, and the expansion rings, shall be not less than

the values specified in Table II

Gasket and

Washer

Thread

1078 SPECIFICATIONS FOR FIRE HosE (PRIVATE DEPARTMENT UsE)

24 (a) The swivels of the couplings shall be provided with rubber gaskets of the same quality as the rubber lining, at least Is in thick, and accurately fitted

(b) The couplings shall have, inside each expansion ring, a rubber

washer at least Is in in thickness and with inside diameter not less than that of the coupling

(c) The inside diameter of the gasket and the washers when in position in the couplings shall be not less than the inside diameter of the hose to which the coupling is attached

25 Wherever practicable and not otherwise specified, the thread shall be the "National Standard Fire Hose Thread" of the National Fire Protection Association

TABLE !I.-WEIGHT OF CbUPLINGS

WEIGHT, COMPLETE, LB

OF HOSE, IN JACKET ]ACKET ]ACKET,

2 2.5 3.0 2! 4.0 5.0

3~ 12.0 14.0

Attachment 26 The couplings shall be attached to the hose in a

workman-of Couplings like manner without cutting the lining or rupturing the cotton jacket

They shall withstand the hydrostatic pressure tests described in Section 10 (a) without the use of tape or rubber tissue as a filler

VI MARKING

Hose, 27 Beginning at a point approximately 4 ft from the couplings,

each 50-ft length of hose shall be stenciled at two places in black indelible letters 1 in high with the legend "A.S.T.M Specifications," the name of the manufacturer, the month and year of manufacture, and the words "Tested at -··- lb.," the pressure stated to be that given in item (j ) of Table I

couplings 28 Both male and female couplings shall be stamped with the

name of the manufacturer and the month and year of manufacture in letters and figures not less than i in high

VII INSPECTION AND REJECTION

Inspection 29 (a) The manufacturer shaH notify the purchaser sufficiently

in advalnce of the completion of the hose to permit of arrangement for inspection

(b) The manufacturer shall afford the inspector representing the purchaser, without charge, all reasonable facilities to satisfy him that

SERIAI DESIGNATION: D 14-23 1079

the hose is being furnished in accordance with these specifications

All tests and inspection shall be made at the place of manufacture

prior to shipment, unless otherwise specified, and shall be so

con-ducted as not to interfere unnecessarily with the operation of the

works

(c) The purchaser may make the tests to govern the acceptance

or rejection of the hose in his own laboratory or elsewhere Such

tests, however, shall be made at the expense of the purchaser

30 (a) Each length of hose that fails in the tests specified in ReJection

Sections 10 (a), 11, 12, or 13, or any other requirement of these

speci-fications shall be rejected

(b) In the case of failure to pass any one of the tests specified in

Sections 8, 9; 10 (b) or 10 (c), the entire lot of hose represented by

the sample, or samples subjected to these tests shall be rejected

31 Samples of rejected hose shall be preserved for two weeks Rehearing,

from the date of test report In case of dissatisfaction with the

results of the tests, the manufacturer may make claim for a rehearing

within that