Code of Federal Regulations Title 46. Shipping § 46.164.023–13 Production tests and inspections

(1) A Constant Rate of Traverse tensile testing machine, capable of initial clamp separation of ten inches and a rate of separation of 30 cm (12 in.) per minute.

(2) Fletcher, Callaway, U.S. Rubber clamps, or equivalent cam-actuated clamps to prevent slippage and twist of the samples.

(3) An analytical balance or grain-yarn scale, accurate to within 0.25 percent of the measured value.

(1) Breaking strength. One sample must be tested in accordance with § 164.023–7(a)(1) or § 164.023–7(b)(1), as applicable.

(2) Length/weight ratio. One sample must be tested in accordance with § 164.023–11(b)(1).

(1) Composition. At least annually, one sample of each accepted thread must be tested in accordance with § 164.023–11(b)(2).

(2) Breaking strength. At least quarterly, one sample in each of the lightest and darkest colors accepted must be tested in accordance with § 164.023–7(a)(1) or § 164.023–7(b)(1), as applicable. This test may be performed by a recognized laboratory, or witnessed by a recognized laboratory inspector at the manufacturer's plant, at the laboratory's discretion.

(3) Elongation. At least annually, one sample of each accepted thread in each of the lightest and darkest colors accepted must be tested in accordance with § 164.023–11(b)(3). This test may be performed by a recognized laboratory, or witnessed by a recognized laboratory inspector at the manufacturer's plant, at the laboratory's discretion.

(1) Breaking strength test results must be within 10 percent below and 20 percent above the acceptance testing values but not less than the performance minimums.

(2) Length/weight values must be within 5 percent of the acceptance testing values but not less than the performance minimums.

(3) Elongation values must be within 20 percent of the acceptance testing values but not less than the performance minimums.

(4) Composition testing must indicate that the sample tested is of identical composition to the sample tested for acceptance or in accordance with the performance specification.