TITLE 8:
GENERAL INDUSTRY SAFETY ORDERS
CHAPTER 4, SUBCHAPTER 7, ARTICLES 64, 138, AND 139
SECTIONS 4415, 5468, 5485 AND 5504
POWER PROCESS PRESSURE PIPING


Amend Section 4415 to read:

4415. Stock Preparation and Reprocessing.

(a) Digester Valves and Piping.

(1) The digester blow valve shall be arranged so as to be operated from another room, remote from safety valves.

(2) Digester piping shall be installed after [ * ], shall conform in accordance with Sections 122-135 ANSI B31.1-1977 ASME B31.1-1995, Power Piping, which is hereby incorporated by reference. Digester piping installed on or before [ * ], shall conform with either Sections 122-135 ANSI B31.1-1977, or the updated version of the ANSI/ASME B31.1 standard in effect at the time of installation.

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NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code. 

* Effective date of these orders to be filled in by the Office of Administrative Law.


Repeal Section 5468:

5468. Piping, Tubing and Fittings.

(a) Piping, tubing and fittings shall be suitable for hydrogen service and for the pressures and temperatures involved. Cast iron pipe and fittings shall not be used.

(b) Piping and tubing shall conform to American National Standard Code for Pressure Piping, Petroleum Refinery Piping, ANSI B31.3 (1973).

(c) Joints in piping and tubing may be made by welding or brazing or by use of flanged, threaded, socket or compression fittings. Gaskets and thread sealants shall be suitable for hydrogen service.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


 Amend Section 5485 to read:

5485. Piping, Tubing and Fittings.

(a) Piping, tubing and fittings and gasket and thread sealants shall be suitable for hydrogen service at the pressures and temperatures involved. Cast iron pipe and fittings shall not be used.

NOTES:

1. Consideration shall be given to the thermal expansion and contraction of piping systems when exposed to temperature fluctuations of ambient to liquefied hydrogen temperatures.

NOTE:

2. Some materials suitable for liquefied hydrogen temperature are austenitic chromium-nickel alloys, certain copper alloys, and aluminum which retain ductility and do not become brittle at the temperature of liquefied hydrogen.

(b) Hydrogen piping and tubing.

(1)Hydrogen piping and tubing installed after [ * ], shall conform to American National Standard Code for Pressure Piping, Petroleum Refinery Piping, ANSI B31.3 (1973). ASME B31.3-1996, Process Piping, which is hereby incorporated by reference.

(2) Hydrogen piping and tubing installed on or before [ * ], shall conform to either the American National Standard Code for Pressure Piping, Petroleum Refinery Piping, ANSI B31.3-1973, or the updated version of the ANSI/ASME B31.3 standard in effect at the time of installation.

(3) For temperatures of -20F to -320F, hydrogen piping shall be approved as defined

Section 3206 of the General Industry Safety Orders. American National Standard Code for Pressure Piping, Refrigeration Piping Systems, ANSIB31.5 (1967) may be used.

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NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

* Effective date of these orders to be filled in by the Office of Administrative Law.


Amend Section 5504 to read:

5504. Piping, Tubing and Fittings.

(a) Piping, tubing and fittings shall be suitable for oxygen service and for the pressures and temperatures involved.

(b) Piping and tubing installed after [ * ], shall conform to American National Standard Code for Pressure Piping, Petroleum Refinery Piping, ANSI B31.3 1973. ASME B31.3-1996, Process Piping, which is hereby incorporated by reference. Piping and tubing installed on or before [ * ], shall conform to either the American National Standard Code for Pressure Piping, Petroleum Refinery Piping, ANSI B31.3-1973, or the updated version of the ANSI/ASME B31.3 standard in effect at the time of installation.

*****

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code. 

* Effective date of these orders to be filled in by the Office of Administrative Law.