Leakage Tests on Unlined Linen Forestry Hose

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Publisher’s version / Version de l'éditeur:

Technical Note (National Research Council of Canada. Division of Building Research), 1966-06-01

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Leakage Tests on Unlined Linen Forestry Hose

Stagg, R. D.; Sumi, K.

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DIVISION OF BUILDING RESEARCH

No.

NATIONAL RESEARCH COUNCIL OF CANADA

470

NOTlE

'fE

C

1HIN ][ CAlL

PREPARED BY _{R. D. Stagg} and K. Sumi

CHECKED BY _{G. W. S.} APPROyED By N. B. H.

June 1966 PREPARED FOR _{CSA Subcommittee on Forestry Fire Hose}

SUBJECT _{LEAKAGE TESTS ON UNLINED LINEN FORESTRY HOSE}

The C. S. A. Subcommittee on Forestry Fire Hose, at a recent meeting, asked the National Research Council for information required for revising a hose specification. The Committee wished to have information about the effect of repeated use and drying of hose on the leakage from the hose. The Fire Research Section, .Division of Building Research, conducted a series of tests; this note provides the results of those tests.

TEST PROCEDURE

The Departm ent of Forestry supplied 100 -foot lengths of four brands of unlined linen hose (Black Chain, Blue Chain, Marshall, and Richmar). From each 100-foot length of hose, six specimens were cut, approximately 11 feet long. Couplings were attached to the specimens. The 24 specimens were then divided into two groups. Three specimens (a, b, and c) of each brand were tested to 300 psi, and the remaining three specimens (d, e, and f) of each brand were tested to 450 psi. Each specimen was conditioned to 70 !20 F and 65 :5 per cent relative humidity

prior to pressure testing, according to the pressure schedule for its group. After pressure testing, the specimen was hung

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- 2

vertically to dry out, in a room, where the humidity was much les s than that in the conditioning chamber. This conditioning-pressure testing cycle was repeated four times for each

specimen. At the completion of the fourth cycle, each

specimen was raised to the maximum pressure it could stand. The pressure schedules for the two groups is outlined in Table 1, and the observations of the leakage measurements are given in Tables 2, 3, 4, and 5. Table 6 gives the maximum pressures attained by each specimen.

REMARKS

The results of this series of 96 tests on 24 specimens, based on four cycles of repeated use and drying, indicated that no definite trend of increased or decreased leakage can be established. After four cycles the maximum pressure that a specimen of hose can withstand shows no difference from that which it is expected to stand when new.

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TABLE 1

PRESSURE SCHEDULES FOR THE GROUPS OF UNLINED HOSE SPECIMENS

Time, Min.

o

1 2 28

29

40 41 511-_z 52 GROUP 1 (specimens a, b, c) EVENT

Admit water, raise to 10 psi Hold 10 psi for 1 minute Raise to 100 psi

Hold 100 psi for lsi minutes Begin 10 -minute leakage

measur ement Stop measurement,

record amount Raise to 200 psi Hold 200 psi

Begin 10 -minute leakage measurement

Stop measurement, record amount Raise to 300 psi Hold 300 psi

Begin 10-minute leakage mea sur ern ent

Stop measurement, record amount (Cycles 1, 2, and 3) release pressure Time, Min.

o

1 2 28

29

40 41 42 44 GROUP 2 (specimens d, e, f) EVENT

Admit water, raise to 10 psi Hold 10 psi for 1 minute Raise to 100 psi

Hold 100 psi for

lsi

minutes Begin 10 -minute leakage

mea sur ern ent Stop measurement,

record amount Raise to 200 psi Hold 200 psi

Begin 10 -minute leakage m easur ern ent

Stop measurement, record amount Raise to 300 psi

Hold 300 psi for 1 minute (check twist, etc.) Raise to 450 psi

Hold 450 psi

Begin 10 -minute leakage measurement

(Cycle 4) Raise at 100 psi per minute to maximum pressure. Record psi

Note the "hold pressure" allowed for

54 Stop measurement,

record amount

54i _{(Cycles 1, 2, and 3) release}

pressure. (Cycle 4) Raise at 100 psi per minute to maximum pressure. Record psi

measurement of twist, elongation of the specimen, etc.

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Table 2

Obser'rations of Lea.kage Measurements for Br3.nd Na. 1

Leakage is recorded

as

total volume in milliliters

for

10 -

faa t length, for

10

minutes a.t the indica ted pressure •

....

Pressure Specimen Cycle

1

Cycle

2

Cy·cle

₃

Cycle

₄

- - -

-a

₄₅

55

50

30

b

60

70

60

40

c

165

130

90

40

100

psi d

60

40

70

35 I

e

₅₅

₃₅

35

30

f

₃₅

35

45

30

a

1160

650

540

320

b

1150

850

640

430

c

1970

1440

850

410

200

psi d

1280

650

840

420

e

1040

320

240

150

f

730

270

210

190 I

a

2660

2260

1850

930

300

psi

I

I b

2525

2725

1890

1200

j I

I

_c

₃₃₉₀

₃₉₂₅

₃₀₀₀

_{ＱｬｾＷＰ}

I

d

₃₇₉₀

₄₄₉₀

3800

2820

450

psi e

3070

2660

2160

1500

f

3790

2300

1980

_Ih4°

_I

I

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Table

3 Observations of Leakage Measurements for Brand No.2.

Leakage is recorded as

ｴｨｾ

total volume in milliliters

for 10

feet, for 10 minutes at the indicated pressure.

Pressure

Specimen

Cycle 1

Cycle 2

_{Clc1e 3}

_{Cycle 4}

a

125

550

960 1940

b

50

40

35

30 100 psi

c

30

20

35

15

d

₄₅

₅₅

_1...

₅

20

e

₄₅

₃₅

20

10 f

15

35

30

10 a

2650

6330

6700

8240

b

525

425

600

580 2:')0

psi

c

315

290

520

490 d

₄₂₅

295

420

380

e

330

245

190

195

f

125

300

250

170 a

6700

12700

13650

13200

300 psi

b

1140

1260

2060

1630

c

700

870 1310

1630

d

1910

2200

2620

2640

450 psi

e

1950

1800

1720

2090

f

775 1600

2130

1530

l

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Table

4 Observations of Leakage Measurement for Brand No.3.

Le8kage is recorded as the total volume in milliliters

per 10-foot length, per 10-minute period at t he indicated pressure.

?res StU'e

Specimen

Cycle 1

ｃｾＧｲ｣ｬ･

2 _{Cycle 3}

_{Cycle 4}

-

_a

₆₅

₁₀₀

₃₈₀₀

₂₈₀₀

b

100

60

100

105

100

psi

_c

₁₀₅

₅₀

₁₁₀

₇₀

d

₇₅

₈₀

₁₄₀

₁₀₅

e

₅₅

₇₀

₃₅

₆₅

f

₈₅

₆₅

₈₅

₅₀

a

1260

₁₄₄₅₀

8780

6850

b

₁₁₃₀

₇₈₀

₁₃₀₀

₁₅₁₀

200

',)8i

_c

₁₄₅₀

₆₂₀

₁₃₃₅

₁₁₀₀

.:!

₁₁₀₀

520

610

590

ｬ｟ｾ

e

940

510

320

495

/>

1150

560

580

450

I

a

2890

17100

14350

13050

300 psi

I)

₂₅₀₀

₁₉₉₀

2900

₅₁₀₀

c

3170

1660

3690

2930

d

₃₅₀₀

₂₉₇₀

₄₀₈₀

₄₁₈₀

450 psi

e

2950

4180

3320

3910

,...

3525

3600

4020

4690

l

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Table

5

Observations of Leakage Measurements for Brand No.4.

Leakage is recorded as the total volume in milliliters per 10-foot length per 10-minute period at the indicated pressure.

ｐｲ･ｾｳｵｲ･ Sp:lcimen Cycle 1 Cycle 2 Cycle 3 Cycle

₄

a 85 350 610 330 b 100 70 50 50 100 psi c 55 45 30 30 d ₅₅ 50 60 20 e 80 60 250 160 f 110 650 530 425 a 700 1400 2020 1760 b 660 510 400 300 200 psi

c

530 340 220 210 d 560 260 325 170 e 770 1515 1680 1440 f 2500 1870 1750 1240 8. 2570 ₃₉₀₀ 3270 3190 300 psi ｾＩ 810 890 650 705

c

71+0 710 400 450 ,-. d 1240 1310 1330 950 450 psi s 5925 5980 5075 5075 f 5700 5370 4725 3900