Page 56 - 2010-2022 hose manufactureing ability and guide

Table 4-5
CIRCULAR WOVEN - FIRE HOSE TOLERANCES
Class 643-A

Inside diameter tolerances are based on the necessity of obtaining the maximum volume of water possible for a given size of
hose. Consequently, minus tolerances are not acceptable.

The length tolerances are:
Length Ordered Minimum Average(*) Minimum Length(*)
Length of Shipment of individual pcs.
Feet Meters Feet Meters Feet Meters
25 7.5 25 7.5 24** 7.3**
50 15.0 50 15.0 48*** 14.6***
75 22.5 75 22.5 72 21.9
100 30.0 100 30.0 97 29.6

* Length to be measured back of coupling to back of
coupling under 10 psi (0.07 MPa).
** Except length from which burst test sample has been
taken may be 22 feet (6.7 m).
*** Except length from which burst test sample has been
taken may be 47 feet (14.3 m).

The I.D. tolerances are:

(a) On all sizes except 2-1/2 in. (64 mm)I.D., no minus
tolerance is permissible. No plus tolerance is set.
(b) On the 2-1/2 in. (64 mm) I.D. size, the minimum inside
diameters shall be not less than 2.56 inches (65 mm).
No plus tolerance is set.

Table 4-6
CIRCULAR WOVEN CHERNACK LOOM
Class 711-A: 721-A; and 731-A

Size —- I.D. I.D. O.D.
±Inch ±Millimeter ±Inch ±Millimeter

Up to 1 inch (25.4 mm) +0.047 +1.19 0.031 0.79
−0.031 −0.79
1 in. thru 3 in. (25 mm thru 76 mm) 0.063 1.59 0.063 1.59
Over 3 in. (76 mm) 0.094 2.38 0.094 2.38

Table 4-7
DREDGING SLEEVES
Class 811-A

Size —- I.D. I.D. O.D.
±Inch ±Millimeter ±Inch ±Millimeter

Under 12 inch (305 mm) 0.125 3.18 0.125 3.18
12 Inch (305 mm) and over 0.250 6.4 0.250 6.4

RMA/IP-2/2003 35