Cal. Code Regs. tit. 17 § 12482

Current through Register 2025 Notice Reg. No. 2, January 10, 2025

Section 12482 - Required and Optional Seam Measurements

(a) Optical System (use of seam scope or projector)

	Required	Optional
	Body hook	Width (length, height)
	Overlap	Cover hook
	Tightness (observation for wrinkle)	Countersink Thickness

(b) Micrometer Measurement System

	Required	Optional
	Cover hook	Overlap (by calculation)
	Body hook	Countersink
	Width (length, height)	Thickness
	Tightness (observation for wrinkle)

Regardless of whether or not a seam scope or seam projector is used, the double seam shall be torn down for examination.

(c) Two measurements shall be made for each double seam characteristic if a seam scope or seam projector is used. If a micrometer is used, three measurements shall be made at points approximately 120 apart, excluding the side seam. The high and low measurements must fall within limits considered to be normal for the conditions.

With regard to measurement limits, the canner shall follow the working limits recommended by the can supplier.

Overlap length can be calculated by the following formula:

The theoretical overlap length = CH+BH+T = W

where CH = coverhook

BH = body hook

*T = cover thickness, and

W = seam width (height, length)

__________

* In general practice, 0.010 may be used for the tinplate thickness.

(d) Records shall be kept on all seam examinations. The form of such records shall be the choice of the canning company, but the records must show the frequency of visual and tear-down inspections, and the measurements made. It is suggested that sample forms be obtained from the can supplier.

For the purposes of State inspection, records of seam examinations must be filed and held for inspection by the State Department of Public Health.

Cal. Code Regs. Tit. 17, § 12482

1. New section filed 3-13-67; effective thirtieth day thereafter (Register 67, No. 11).

Note: Authority cited: Section 28440, Health and Safety Code. Reference: Sections 28310- 28322, Health and Safety Code.

1. New section filed 3-13-67; effective thirtieth day thereafter (Register 67, No. 11).