Specification for hose clamps and hose bandages for fire brigade use, Part 2: Hose bandages
1977 Edition

Overview of Scope and Sampling Criteria from IS 5612 Part 2 (1977)

• Sampling is conducted by lot, with lot sizes determining sample sizes and permissible defect counts.
• Table 1 defines the sampling plan:

• Acceptance requires defective items to be within the allowed limit.
• Nylon tape for edge binding must comply with IS 4228-1967.
• Sampling follows random selection methods as per appendix specifications.

Definitions and Components Under IS 5612 Part 2

• Hose-bandages: Devices used to secure fire hoses.
• Lot: A grouped batch of hose-bandages for inspection.
• Sampling: Random selection of items from a lot to check compliance.

The acceptance of a lot depends on the number of defective samples not exceeding permissible limits, as given in Table 1.

Materials Specified in IS 5612 Part 2

• Nylon tape, conforming to IS 4228-1967, is used for binding the edges of hose-bandages.
• The bandages must be manufactured from materials meeting the standard's criteria for durability and performance.
• Sampling and defect acceptance criteria apply as per Table 1.

Shape and Dimensions of Hose-Bandages

• Hose-bandages are constructed from 25 mm wide nylon tape with stitched edges complying with aeronautical nylon tape standards.
• The shape and dimensions conform to the illustration (Fig. 1) provided in the standard.
• Quality control sampling follows the lot size dependent plan.

Workmanship Standards in Hose-Bandage Production

• All edges must be rounded and free from sharpness to ensure safety.
• Surfaces should be smooth and finished to high quality.
• Defects are monitored through sampling as detailed in Table 1, with acceptance based on permissible defective counts.

Protocol for Leakage Testing of Hose-Bandages

• Samples are randomly chosen according to lot size.
• The bandage is tested by wrapping tightly around a hose with a 3 mm perforation.
• The hose is pressurized to 70 N/cm² and secured with nylon string.
• The test lasts for 5 minutes, during which no loosening or leakage should occur.
• Minor leakage through the edges is permissible and does not constitute failure.

Marking Requirements for Hose-Bandages

• Hose-bandages may bear the Standard Mark indicating compliance.
• Marking is subject to regulations under the Bureau of Indian Standards Act, 1986.
• Manufacturer's name or trademark and year of manufacture should be clearly indicated.
• Sampling for marking conformity is consistent with the sampling plan.

Packaging Guidelines per IS 5612 Part 2

• Each hose-bandage is to be neatly rolled and wrapped individually in a cellophane cover.
• Six bandages are packed per corrugated carton.
• Sampling and acceptance criteria for packaging conformity follow the established sampling plan.

Sampling and Acceptance Standards

• Random sampling is used to select samples from each lot.
• Sample sizes and permissible defective counts depend on lot size as enumerated in Table 1.
• A lot is accepted if the number of defective items does not exceed the allowed limit; otherwise, it is rejected.

Appendix A: Sampling and Conformity Criteria

• Sampling is conducted by lot, with sizes and permissible defectives as per the table.
• Random selection is performed using random number tables.
• The criteria ensure quality control before lot acceptance.

Acceptance requires the defective count to be within permissible limits.