ASTM D296 (1977) Specification for RubberLined Fire Hose with Woven Jacket (Withdrawn 1983)

AMERICAN NATIONAL ANSI/ASTM D 296 - n Reproduced By GLOBAL

STANDARD ENGINEERING DOCUMENTS
With The Permlsalon Of ASTM
Under Royalty Agreement

AMERICAN SOCIETY FOR TESTING AND MATERIALS
1916 Race St., Philadelphia, Pa. 19103

Reprinted from the Annual Book of ASTM Standards, Copyright ASTM
If not listed in the current combined index, will appear in the next edition.

Standard Specification for

RUBBER-LINED FIRE HOSE WITH WOVEN JACKET1

This Stand3!d is issued under. the fixed design~~on D 296; the num~r_i~mediately foll~wing the designation indicates the

year of ong1Dal adoption or, ID the case of reV1s1on, the year of last rev1S1on. A number ID parentheses indicates the year of

last reapproval. ·

1. Scope larities of twist as is consistent with good man-
ufacturing practice. If agreed between the
1.1 This specification applies to the trade manufacturer and the purchaser at the time of
sizes of 38-mm (l'h-in.), 51-mm (2-in.), and the order, the jackets may be made in whole
64-mm (2 112-in.) single-jacket and 38-mm or in part of fibers other than cotton suitable
(1 1/2-in.), 51-mm (2-in.), 64-mm (2½-in.), for assuring satisfactory service life.
76-mm (3-in.), and 89-mm (3 1/2-in.) multiple-
jacket, rubber-lined fire hose suitable for use 4.2 Each jacket shall be seamless and shall
in public or private fire departments. Single- have the fillers woven around the hose

jacket hose may be provided with a protective throughout its length and the warps inter-
cover. Hoses will be hydrostatically pressure- woven with and substantially covering the fill-
tested with couplings attached but the cou- ers. The jackets may be separate or inter-
plings or method of attachment are not cov- woven.
ered by this standard.
S. Rubber Lining
2. Applicable Documents
5 .1 The lining shall be made of a properly
2.1 ASTM Standards: vulcanized rubber compound which will com-
D 412 Tests for Rubber Properties in Ten- ply with all tests specified in Sections 6 to 8,
inclusive. It shall be made from either calen-
sion2 dered sheets, lap-jointed and vulcanized in
D 572 Test for Rubber Deterim:ation by one solid body, or from a single-ply extruded
tube.
Heat and Oxygen Pressure3 ·
D 3183 Rubber-Preparation of Pieces for 5.2 The waterway surface of the lining
shall be smooth and partically free from pit-
Test from Other Than Standard Vulcan- ting and other imperfections and from corru-
ized Sheets2 gations.

3. Ordering Information 5.3 The lining shall be of uniform thickness
and within the limits of thickness, exclusive of
3.1 Orders for fire hose under this specifi- backing, shown in Table 1.
cation should include the following informa-
tion: 5.4 Backing- The backing, if used, shall
not exceed 0.71 mm (0.028 in.) in thickness,
3.1.1 ASTM designation, as measured from the bottom of the corruga-
3.1.2 Different jacket fibers, if required tions. It need not be of the same composition
(see 4.1), as the rubber lining, but the adhesion between
3.1.3 Conditions and location regarding

hydrostatic pressure test (see 9 .1), ' This specification is under the jurisdiction of ASTM
3.1.4 Hose diameter size required (see Committee D-11 on Rubber and Rubber-Like Materials
12.1), and and is the direct responsibility of Subcommittee D 11.31 on
3.1.5 Length required (see 13.1). Rubber Hose.

4. Woven Jacket Current edition approved March 25, 1977. Published
May 1977. Originally published as D 296-28 T. Last pre-
4.1 The jackets shall be well, evenly, and vious edition D 296-76.
firmly made from good cotton free from un-
sightly defects, dirt, knots, lumps, and irregu- • Annual Book of ASTM Srandards, Pans 35 and 37.
3 Annual Book of ASTM Standards, Part 37.

~m~ D 296

: : . :.. J1:' - static pressure of 2.1 MPa (300 psi) for 5 s
without leaking, or breaking any thread in the
the backing and the jacket shall conform to jacket. Each length of multiple-jacketed hose
the requirements specified in Section 8. shall withstand a hydrostatic pressure of 2 .8
MPa (400 psi) for 5 s without leaking or
6. Tensile Properties of Lining breaking any thread in the jackets.

6 .1 The tensile strength of specimens taken 9.3 Elongation -The elongation of the
from the rubber lining shall not be less than hose under 2.1 MPa (300 psi) hydrostatic
8.3 MPa (1200 psi). pressure for single-jacketed, and 2.8 MPa
(400 psi) for multiple-jacketed, shall not ex-
6.2 Elongation at Rupture -The ultimate ceed 10 % of the length for single-jacketed
elongation, when rupture occurs in the tensile hose and 8 % of the length for multiple-
strength test, shall not be less than 400 % 51 jacketed hose, from an initial measurement
to 255 mm (2 to 10 in.). taken at a pressure of 69 kPa (10 psi).

6.3. Permanent Elongation -The perma- 9.4 Twist-The hose, under 2.1 MPa (300
nent elongation (or set) of specimens cut psi) hydrostatic pressure for single-jacketed,
transversely from the lining, elongated from and 2.8 MPa (400 psi) for multiple-jacketed,
51 to 204 mm (2 to 8 in.), held for 2 min, shall not twist more than indicated in Table 1.
released, and measured 2 min after release These measurements shall be based on an
shall not exceed 25 % . original position established under a hydro-
static pressure of 69 kPa (10 psi). The figures
7. Accelerated Aging Test in Table 2 refer to the final twist in a direction
to tighten, rather than loosen, the couplings.
7 .1 The tensile strength and ultimate elon- A twist to the right (in the direction that
gation of specimens of the rubber lining that would tend to tighten the couplings) is indi-
have been subjected to the action of oxygen at cated by a clockwise rotation of the free end
a pressure of 2100 ± 69 kPa (300 ± 10 psi) of the hose, viewing from the supply end. A
and a temperature of 70 ± 2°C (158 ± 3.6°F) maximum twist to the left of 6 .6 deg/m (2 deg/
for a period of 96 h shall be not less than 60 % ft) will be permitted while pressure is being
of the tensile strength and ultimate elongation raised, and any final twist shall be to the right.
of similar specimens that have not been
heated in oxygen. 9.5 Warp and Rise-The hose, under 2.1-
MPa (300-psi) hydrostatic pressure for single-
8. Adhesion Test of Lining jacketed, and 2.8 MPa (400 psi) for multiple-
jacketed, shall not warp more than 510 mm
8.1 The adhesion between the lining and (20 in.) from a straight line drawn from center
the cotton jacket shall be such that the rate of to center of the findings on the ends of the
. separation of a 38-mm (1 ½-in.) strip of lining hose. No rise from the level of the test table
from the jacket shall be not greater than 25 . shall be permitted for multiple-jacketed hose.
mm (1 in.)/min under a weight of 5.4 kg (12 Single-jacketed hose shall not rise from the
lb). level of the test table more than that indicated
in Table 3. These measurements shall be
8.2 This requirement is not intended to ex- based on an original position established un-
clude a construction that provides no adhesion der a hydrostatic pressure of 69 kPa (10 psi).

between the jacket and lining along the fold, if
the surface over which there is no adhesion is 10. Bursting Strength Test
not greater than 35 % of the total surface.
10.1 A 1-m, (3-ft) sample of the hose,
9. Hydrostatic Pressure Tests while lying either straight or curved to a radius
of 69 cm (27 in.), shall withstand without
9.1 All hydrostatic pressure tests shall be failure a hydrostatic pressure as indicated in
performed either at the factory or at the desti- Table 4.
nation, at the discretion of the purchaser. Ar-
rangements for such tests shall be subject to 11. Kink Test
agreement between manufacturer and the 11.1 A full length of the hose, while
purchaser at the time the order is placed. If
desired, the manufacturer may humidify the kinked, shall withstand without rupturing or
hose for hydrostatic tests.

9.2 Proof Pressure Test-Each length of
single-jacketed hose shall withstand a hydro-

2

D 296

breaking any thread in the jackets a hydro- 16.3 One length of hose shall be selected at
static pressure as indicated in Table 5. random from every 760 m (2500 ft), or frac-
tion thereof, for the kink test specified in
12. Diameter Section 11.

12 .1 The hose shall have an internal diam- 16.4 A sample, 1 m (3 ft) in length, shall
eter of not less than the trade size of the hose, be taken from every 1520 m (5000 ft) of hose,
except that for 64-mm (2 1/i-in.) hose the in- or fraction thereof, for the bursting strength

ternal diameter shall be not less than 65 mm test specified in Section 10.
(2 9/i6 in.).
TEST METHODS
13. Length
17. Lining Thickness
13.1 Unless otherwise specified, the hose
shall be in nominal lengths of 15.2 m (50 ft). 17 .1 Apparatus:
No nominal 15.2-m (50-ft) length shall be less 17.1.1 Dial Micrometer, graduated to
than 14.6 m (48 ft) before sampling. Length 0.025 mm (0.001 in.) and having a presser
measurements shall be made from back end to foot 6.3 ± 0.25 mm (0.25 ± 0.01 in.) in
back end of the couplings, with the hose under diameter, exerting under dead load a total
69-kPa (IO-psi) hydrostatic pressure. force of (0.84 ± 0.03 N) (3 ± 0.1 ozf).
(7 .1.2 Buffing Machine in accordance with
14. Workmanship Recommended Fractice D 3183.
17 .1.3 Metal Die, conforming to Die A re-
14.1 The character of the workmanship quirements of Methods D 412.
shall be such as is incident to good manufac- 17 .2 Procedure:
turing practice. 17 .2 .1 Separate the lining of vulcanized
rubber or unmilled natural rubber latex from
15. Marking the jacket without the use of solvent, if prac-
ticable, and without excessive stretching of
15 .1 Beginning at a point not less than 1 .2 the rubber. If it is necessary to use a solvent,
m (4 ft) from each end, each 15 .2-m (50 ft) use a commercial isooctane, benzene, or simi-
length of hose shall be stenciled at two places lar low-boiling petroleum solvent which, upon
in indelible letters at least 25 mm (1 in.) in evaporation, will not leave an oily residue.
height with the name of the manufacturer, or Make the separation gradually while gripping
other identification acceptable to the pur- the lining near the point of separation. Then
chaser, and the month and year of manufac- place the lining so as to permit free evapora-
ture. tion from all parts of the surface and allow to
rest at least 1 h before measuring.

16. Sampling 17 .2 .2 Take the thickness on two 12 .5-mm
( 1h-in.) die-cut specimens cut from the ring
16.1 Each length of hose shall be examined sample, selected so that the specimens include
and tested for the following items: opposite folds in their constricted portions.
Buff the constricted portions of these die-cut
16.1.1 Weaving of jackets, specimens just sufficiently to remove the fab-
16.1.2 Construction of lining, ric impressions left by the jacket. The speci-
16 .1.3 Smoothness of waterway, mens may be buffered by hand, if desired.
16.1.4 Workmanship, After buffing, take three measurements on
16.1.5 Length, each specimen in the area from which the
16 .1.6 Hydrostatic proof pressure, fabric impressions have been removed, using
16.1.7 Elongation, twist, warp, and rise, the dial micrometer specified in 17 .1 .1. Take
and the average of six measurements as the lining
16.1.8 Marking. thickness.
16.2 A sample not less than 200 mm (8 in.) 17 .2 .3 Separate the linings of latex-coated
in length shall be taken from each lot of 380 m fabric from the jacket without the use of sol-
(1250 ft) or fraction thereof of hose, for the vent as specified in 17 .2 .1 and measure the
tests specified in Sections 5 .3, 6, 7, 8, and 12.
All test specimens shall be cut transversely
from the sample whenever possible.

3

D 296

total thickness of fabric and coating as speci- 19. Physical Tests
fied in 17 .2.2, except omit buffing of the spec-
imens. Then carefully separate the latex coat- 19 .1 Apparatus:
ing from the fabric and measure the thickness 19 .1.1 Testing Machine - Tension tests
of the coating as specified in 17 .2.2, except shall be made on a power-driven machine

omit buffing of the specimens. equipped with a suitable dynamometer and
indicating or recording device for measuring
18. Lining Adhesion the applied force within ± 2 % (Note 1). If
the capacity range cannot be changed during a
18 .1 Apparatus - The apparatus required test, as in the case of the pendulum dynamom-
for this method consists of a supporting frame, eter, the applied force at break shall be mea-
clamps, weights, weight holders, and a timer. sured within ± 2 % , and the smallest tensile
The supporting frame shall be of such design force measured shall be accurate to within
that specimens, with weights attached, may be 10 % . If the dynamometer is of the compen-
suspended vertically and hang freely during sating type for measuring tensile stress di-
the progress of the test. rectly, means shall be provided to adjust for
the cross-sectional area of the specimen. The
18.2 Procedure: response of either an indicator or recorder
18.2.1 Cut the adhesion test specimens all shall be sufficiently rapid that the applied
transversely from the samples in rings 50 mm force is measured with the requisite accuracy
(2 in.) in width. Then open these rings and lay during the extension of the specimen to rup-
them out flat so as to give rectangular speci- ture. If the tester is not equipped with a re-
mens of length equal to the full circumference corder, a device shall be provided that indi-
of the hose. Accurately cut on each specimen cates after rupture the maximum force applied
a central strip of lining 38 mm (1 ½ in.) in during extension. Testers equipped with a de-
width, the cut extending through the lining vice to measure elongation automatically shall
but not entirely through the woven jacket. be capable of determining extensions within
Separate these strips from the jacket at one 5 % of the original length. If elongation is
end for a distance of about 38 mm. measured manually, a scale capable of meas-
18.2.2 With the separated jacket gripped uring each 10 % elongation shall be provided.
in a stationary clamp, grip the separated rub-
ber in a freely suspended clamp hanging verti- Norn 1-An accuracy of 2 % does not permit
cally, to which the prescribed weight is at- the use of the portion of the range below 50 times
tached with suitable provision for supporting the smallest change in force that can be measured.
and releasing it slowly without jerking. Note In machines with close graduations the smallest

the dista·nce through which separation takes change in force that can be measured may be the
place for a period of 10 min, or until complete value of a graduation interval; with open gradua-
separation occurs. Take the adhesion to the tions, or with magnifiers for reading, it may be an
jacket as the rate obtained by dividing the estimated fraction, rarely as fine as one tenth of a
total distance separated in centimetres (or graduation interval; and with verniers it is custom-
inches) (to the nearest 2.54 mm (0.1 in.)), by arily the difference between the scale and vernier
the elapsed time in minutes. graduations measured in terms of scale units. If the
18 .2 .3 If a rubber backing is used between indicating mechanism includes a stepped detent, the
the lining and the jacket, determine the adhe- detent action may determine the smallest change in
sion between the lining and the backing and force detectable.
the adhesion between the backing and the
jacket, using 18.1 to 18.2.2. If the adhesion 19 .1.2 Grips - The tester shall have two
between the lining and the backing or be- grips, one of which shall be connected to the
tween the backing and the jacket cannot be dynamometer, and a mechanism for separat-
determined because the backing has a ten- ing the grips at a uniform rate of 8.3 ± 0.8
dency to tear during the test, consider the rate mm/s (20 ± 2 in./min) (Note 2) for a distance
of separation between separating members as of at least 750 mm (30 in.). Grips for testing
the adhesion. dumbbell specimens shall tighten automati-
cally and exert a uniform pressure across the
gripping surface, increasing as the tension in-
creases in order to prevent uneven slipping
and to favor failure of the specimen in its

4

D 296

constricted section. At the end of each grip a break in the curved portion just outside the
positioning device is recommended for insert- gage marks may be accepted if within the
ing specimens to the same depth in the grip minimum requirements.

and aligning them with the direction of pull.
19 .2 .2 Calculation:
NoTE 2-A rate of separation of 17 mm/s (40 in./ 19.2.2.1 Calculate the tensile strength as
min) may be used in routine work and notation of follows:
the speed used made on the report, but in casi: of
dispute the rate shall be 8.3 :!: 0.8 mm/s (20 :!: 2 m./ Tensile strength, MPa(psi) = FIA
min).
where:
19.2 Tensile Strength and Elongation: F observed force to break the specimen,
19.2.1 Procedure-Cut dumbbell speci-
mens transversely from the sample using Die and
A of Methods D 412. Buff specimens oflining A cross-sectional area of the unstretched
to remove uneveness of surface, such as jacket
depressions or corrugations, and to remove specimen.
backing, if used, which would interfere with 19 .2 .2 .2 Calculate the elongation as fol-
an accurate measurement of the specimen lows:
thickness. Buff the samples prior to cutting
out with the die. Make three measurements Elongation,% = ((L - L 0 )/L0 ] x 100
for thickness in the constricted portion of the
specimen. Use the minimum value obtained where:
as the thickness of the specimen in calculating L observed distance between the bench
the tensile strength. Place two parallel gage
marks for use in determining elongation sym- marks on the stretched specimen, and
metrically 50 mm (2 in.) apart on the con- L0 original distance between the bench
stricted portion perpendicular to the longitu-
dinal axis of the specimen. The marks should marks.
be narrow as consistent with good visibility. 19 .3 Permanent Elongation - Determine
Marks made with ink, using a stamp with the permanent elongation (or set) on speci-
parallel steel blades, are recommended. Take mens cut transversely from the lining, elon-
care not to injure the lining. Make measure- gated to 75 % of the required ultimate elon-

ments of tensile strength and elongation on gation, held for 2 min, released, and mea-
the same specimen. Place the test specimen in sured 2 min after release.
the clamps, using care to adjust it symmetri- 19 .4 Accelerated Aging - Prepare three
cally in order that the tension is distributed specimens taken from the lining in the same
uniformly over the cross section. If the tension manner as for physical tests, except for stamp-
is greater on one side of the test specimen ing the 50-mm (2-in.) marks before placing
than on the other, the gage marks will not the samples in the aging vessel. Then age the
remain parallel and the maximum strength of specimens for 96 hat 70 :!: 2°C (158 :!: 3.6°F)
the rubber will not be developed. Start the in accordance with Method D 572.
machine and run until the specimen ruptures.
Note and record the elongation and breaking 20. Rubber Cover
load. Elongation is the increase in distance
between the gage marks at rupture. Tensile 20.1 Procedure - When single-jacketed
strength is the breaking load in newtons hose is supplied with a protective rubber cov-
(pounds-force) divided by the product of the ering, perform tests on the cover for thick-
minimum thickness and width of the con- ness, tensile, elongation, adhesion, set, and
stricted portion. When a dumbbell test speci- aging as spelled out for the lining.
men breaks outside the gage marks, or if the
result of either tensile strength or elongation 21. Hydrostatic Pressure Tests
is below the requirements, test an additional
specimen, and consider the results as final. 21.1 Due to the inherent danger to person-
However, results of tests of specimens that nel in conducting tests at high pressures on
fire hose, only well-qualified personnel shall
perform the following testing under proper
conditions. It is strongly recommended that
they be performed at the factory or an inde-
pendent test laboratory equipped to perform
the required tests. Before testing, the hose
may be humidified by the manufacturer.

5

D 296

21.2 Proof Pressure: necessary to complete the measurements and
21.2 .1 Apparatus - Hydrostatic pressure observations. To expedite the test program, a
may be applied by means of a hand or power- "nominal length" may be assumed unless the
driven pump or an accumulator system capa- actual length measured at 70 kPa (10 psi) is
ble of increasing the pressure in the hose at a less than 14.6 m (48 ft) or more than 16.1 m
rate not less than 2 .1 MPa (300 psi) nor more (53 ft).
than 7.0 MPa (1000 psi)/min. A test table, or
equivalent, may be used to provide a clear 21.3 Elongation - For hose that does not
space of at least 500 mm (20 in.) wide on each warp to any extent, take the measurement
side of a line drawn through the center of the parallel to the edge of the test table. For this
water supply connection parallel to the edges purpose, mark off an edge of the table in
of the test table and equipped with properly metres and millimetres (or feet and inches).
calibrated pressure gages. A slight incline up- When the hose warps to any appreciable ex-
ward from point of supply is desired to facili- tent and particularly when the allowable limit
tate in removing air when filling the hose. of elongation is approached, measure the
21.2.2 Procedure: length at final pressure by following the con-
21 .2.2.1 Connect one end of the length to tour of the hose. Take all measurements from
the supply and fill with water. Elevate the the inside edges of the fittings.
opposite end during the filling period to allow
all air to escape through a petcock before 21.4 Twist - The amount of twist can be
applying pressure. This is important as a measured by following the color line or by
safety measure because expansion of air com- noting, during the period during which the
pressed in the hose, when suddenly released pressure is being applied, the turns of the
by bursting or other failure, might result in a fittings at the free end of the hose. Record the
serious accident. Then close the petcock and amount of twist to the nearest one-eighth turn
raise the pressure to 70 kPa (IO psi) and hold or 45 deg. Report the direction of twist as

there while the initial length measurement is right or left. A right twist is in the direction
taken. While at this pressure, straighten out that would tend to tighten couplings.
the hose in order to obtain accurate measure-
ment. Measure the length of hose between 21.5 Warp- Warping is the deviation from
fittings and record to the nearest 10 mm (or 1 a straight line drawn from fitting to fitting in a
in.). Note the position of the hose with regard plane parallel to the surface on which the hose
to twist. From this point on, neither the hose rests. For hose having nominal length of 15 m
nor the fittings are to be touched, moved, or (50 ft), the amount of warping is the maxi-
interfered with in any way until all measure- mum deviation of any portion of the hose
ments and observations have been completed from a straight line drawn from center to cen-
at the final test pressure. ter of the fittings. For hose having nominal
21.2 .2.2 During the time the hose is being length greater than 15 m (50 ft) and up to 30
prepared for this test, note and record the m (100 ft), the amount of warping is the
jacket construction and workmanship in maximum deviation of any 15-m (50-ft) por-
weaving, particularly the matter of knots, tion of the hose from an initial straight line
loose ends, and skips in warp threads. drawn from the center of the fittings at each
21 .2 .2 .3 Following measurement of length end of the hose. The warp is measured as the
at 70 kPa (10 psi), increase the pressure in the distance from the referenced straight line to
hose at a rate of not less than 2 .1 MPa (300 the center line of the hose at the point of
psi) nor more than 7 .0 MPa (1000 psi)/min maximum deviation. As an alternative
until the required test pressure is reached. method, when desired by the manufacturer,
While the pressure is being increased carefully the position of the hose relative to the water
examine the hose for leakage and other de- supply may be reversed, end for end, follow-
fects. Maintain the test pressure for at least 15 ing the first measurement of warping, and the
s, but not more than 1 min. The time during test for warping then repeated.
which the test pressure is maintained should
not exceed the minimum of 15 s longer than is 21.6 Rise - Consider the amount that the
hose rises from the surface of the test table as
"rise", and record as such. Report results to
the nearest 10 mm (or¼ in.).

21.7 Kink:

6

D 296

21. 7 .1 Apparatus - The apparatus shall be water supply, expel the air, and raise the pres-
the same as in 21.2.1. sure at a rate of not less than 2 .1 MPa (300
psi) nor more than 7.0 MPa (1000 psi)/min
21. 7 .2 Procedure - Conduct this test on a until the hose bursts. The sample may be
full length of hose. Fill the hose with water tested straight or curved to a radius of 690
with the petcock open to allow all air to es- mm (27 in.). Where more than one sample is
cape. Then close the petcock, raise the pres- to be tested, perform the test alternately,
sure to approximately (but not exceeding 70 straight and curved.
kPa (10 psi), and kink the hose 45 cm (18 in.)
from the free end by tying the hose back 21. 9 Diameter:
against itself as close to the fitting as practica- 21.9.1 Apparatus-A tapered plug gage of
ble, so that there will be a sharp kink. Then wood or metal having a taper of 31 mm/m {3/s
raise the pressure at a rate of not less than 2 .1 in./ft), marked to indicate variations of 1.5
MPa (300 psi) nor more than 7 .0 MPa (1000 mm (1164 in.) in diameter and provided with a
psi)/min to the required pressure and immedi- slot 16 mm (5/s in.) wide by 2.3 mm {3/n in.)
ately release. deep to accommodate the lap joint of the hose
lining.
21.8 Burst: 21.9.2 Procedure-Cut the end of the hose
21.8 .1 Apparatus - The apparatus shall be square and insert the tapered plug gage in the
similar to that for 21.2 .1, except that instead hose sample until a close fit is obtained with-
of the test table, a suitable enclosure shall be out forcing. Record the diameter of the gage
used to protect the operator. at the end of the sample, to the nearest 1.5
21.8 .2 Procedure -Cut a 1-m (3-ft) sample mm {1/64 in.) as the internal diameter of the

from a length selected at random before the hose.
length is subjected to the hydrostatic proof
test. Connect the sample to the source of

TABLE 1 Requirements for Lining Thickness TABLE 3 Rise of Single Jacket Hose

Internal Diameter of Hose Lining Thickness, Size of Hose, Single Jacket Permissible Rise,
min max

mm in. mm in. mm in. mm in.

38, 51, and 64 JI/,, 2 and 21/, 1.24 0.049 38 and 51 11/, and 2 180 7
76 3 1.47 0.058 64
89 . 3 1/ i 1.83 0.072 211, 100 4

TABLE 2 Twist Requirements for Hose

Trade Size of Hose Twist, max

Jackets

mm in. deg/m deg/ft

38 and 51 I 112 and 2 single 164 50
64 2½ single 82 25
38 and 51 I½ and 2 multiple 95 29
64, 76, and 89 2 ½, 3, and 3 \/2 multiple 40 12

7

~m~ D 296
TABLE 4 Burst Pressure or Hose Sample

Trace Size Required Pressure

mm in. Number or Jackets MPa psi

38. 51. and 64 I'"· 2, and 211, single 3.5 500
38. 51. 64. 76. and 89 multiple
11,,,-2. 2 ,,;, 3. and 3 'n 4.2 600

TABLE 5 Bursi Pressure or Kinked Hose

Trade Size Required Pressure

in. Number of Jackets MPa psi

m

38, 51. and 64 I'"· 2." and 1 single 2.1 300
38, 51, and 64 multiple
76 and 89 2 11 multiple

11,,. 2. and 2 111 2.5 350

3 and 3 1,, 1.8 250

The American Society for Testing and Materials takes no position respecting the validity ofany patent rights asserted
in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination
ofthe validity ofany such patent rights, and the risk ofinfringement of such rights, is entirely their own responsibility.

8