California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 1 - Unfired Pressure Vessel Safety Orders › Appendix C - Acceptance Tests for Plastic Piping

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
The following are tests that shall be passed for acceptance
					 of plastic piping for the conveyance of compressed air:
1. Test for impact resistance at 0° C: (32°
					 F)
Objective: To determine if the material will withstand the
					 energy of impact without fracturing through the complete wall thickness.
Form of test specimen: Each specimen shall be a section of
					 pipe, of a length equal to twice the nominal size or 150 mm (6"), whichever is
					 greater, subject to a maximum length of 300 mm (12"). The ends of the specimen
					 shall be cut clean and equal to the axis of the pipe.
For "round-the-clock" testing, each specimen shall be
					 marked with the number of longitudinal lines shown in Table 1.
NOTE: For pipe sizes 50 mm (2") and over, specimens are
					 subjected to impact equally spaced around the pipe; this procedure is known as
					 "round-the-clock" testing.
Apparatus: A falling weight machine (an example of which is
					 shown in Figure 1) shall be used and shall consist essentially of the
					 following:
a. A main frame which can be rigidly fixed in a true
					 vertical position.
b. Guide rails, carried from the inside of the main frame,
					 on side bearings which can be adjusted to keep them parallel and
					 vertical.
c. A weighted striker that can fall freely within the guide
					 rails and that is equipped with a hardened hemispherical striking surface 25 mm
					 (1") in diameter. The striking surface shall be free from flats and/or other
					 imperfections.
d. An appropriate set of weights which can be firmly
					 attached to the striker to enable the combined weight to be adjusted to the
					 values shown in Table 2.
Procedure: Adjust the total energy of the striker to the
					 value appropriate to the pipe diameter being tested as shown in Table 2.
Condition each specimen in a water or ethylene glycol bath
					 for at least one hour prior to the test at a temperature of 0° C (32°
					 F) + 1°. Test individual specimens within 10 seconds of removal from the
					 bath. allow the striker to fall freely onto the pipe specimen, which is
					 centrally mounted on the vee block support.
Specimens from 10 mm (3/8") to 38 mm (1-1/2") (inclusive)
					 nominal size shall be subjected to a single strike only.
For pipe size 50 mm (2") and above. Place the pipe on the
					 vee block, so that one of the marked lines is uppermost. Then allow the weight
					 striker to fall freely on the marked line on the pipe as described above. If
					 the specimen does not fail as a result of cracking or splitting through the
					 pipe wall, rotate the specimen until the next marked line is uppermost in the
					 vee block, and cause a second blow to be made by the striker. Repeat the
					 process until all the marked lines have been tested, or until a failure is
					 recorded.
If the required sequence of impacts has not been completed
					 within 10 seconds, interrupt the procedure and immediately recondition the
					 specimen at a temperature of 0° C (32° F) + 1° for at least 10
					 minutes.
Fracturing or cracking through the complete wall thickness
					 of the test specimen shall be a failure.
The following tests (Nos. 2 & 3) are intended to
					 simulate a potential destructive impact. Splitting through the pipe wall or
					 puncture is acceptable for passing results, if:
(a) No separation of one part of piping length from its
					 mating part occurs.
(b) No separation of any material fragment from the body of
					 the piping occurs.
2. Test for impact resistance at design pressure at 0°
					 C (32° F) with blunt striker. Testing procedures and apparatus shall be the
					 same as Test No. 1, except:
(a) Pressurize and maintain pipe sample at design pressure
					 and cool to 0° C (32° F) as in Test No. 1.
(b) Energy of the striker to be twice the total energy of
					 Table 2.
(c) Only one drop required.
3. Test for impact resistance at design pressure at 0°
					 C (32° F) with sharp striker. Same as Test No. 2 in all cases, except with
					 a chisel edged sharp striker (Figure 2).
4. The plastic piping systems shall be capable of
					 sustaining without failure at least 600 psi when tested to the Standard Test
					 Method for Short-Time Hydraulic Failure Pressure of Plastic Pipe, Tubing, and
					 Fittings, using ASTM Designation No. D1599-86 (1986) which is herein
					 incorporated by reference. This test shall be performed on each batch of pipe
					 and fittings.
5. The plastic piping system shall be capable of sustaining
					 without failure at least 460 psi when tested to the Standard Test Method for
					 Time-to-Failure of Plastic Pipe Under Constant Internal Pressure using ASTM
					 Designation No. D1598-86 (1986), which is herein incorporated by reference, for
					 at least 1,000 hours. This test shall be performed anytime there is a change
					 in:
(a) material composition, compound or processing
					 technique;
(b) design or size of joint or fitting;
(c) but, in any case not less than every 12 months.
Table 1.
Number of Lines For "Round-the-Clock"
					 Testing
Normal Size mm
							 (inches)
Number of Equidistant Lines to
							 be Drawn
50 mm
							 (2")
3
63 mm
							 (2-1/2")
4
75 mm
							 (3")
4
100 mm
							 (4")
6
Table 2.
Energy of Striker
Normal Size of Pipe mm
							 (inches
Total Energy of Striker ft.
							 lbs.
10 mm (3/8")
22
12 mm (1/2")
33
19 mm (3/4")
43
25 mm (1")
54
38 mm (1-1/2")
65
50 mm (2")
76
63 mm (2-1/2")
98
75 mm (3")
98
100 mm (4")
110
(c) Whenever an owner or user of any apparatus or equipment
					 fails to pay the fees required under this section within 60 days after
					 notification, said owner or user shall pay, in addition to the fees required
					 under this section, a penalty fee equal to 100 percent of such fee. For the
					 purpose of this section, the date of the invoice shall be considered the date
					 of notification.
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1. New
					 Appendix C filed 3-28-78; effective thirtieth day thereafter (Register 78, No.
					 13).
2. Repealer and new Appendix C filed 4-8-92; operative 5-8-92
					 (Register 92, No. 18).
3. Change without regulatory effect providing
					 more legible illustrations filed 8-4-2008 pursuant to section
					 100, title 1, California Code of
					 Regulations (Register 2008, No. 32).