§ 13.18. Transfer of liquids.

 (a)  Only an authorized attendant shall connect, disconnect and remain close to the operation at all times during transfer of liquefied petroleum gas.

 (b)  Transfer of liquids shall not be performed in proximity to any open flame or other source of ignition.

 (c)  No person or persons shall fill or refill any tank or cylinder with liquefied petroleum gas unless such vessel is designed and constructed for that purpose, in accordance with this subchapter, and with authorization from the owner.

 (d)  Gas or liquid shall not be vented to the atmosphere to assist in transferring contents of one container to another except that this shall not preclude the use of listed pumps utilizing LP-Gas in the vapor phase as a source of energy, and venting such gas to the atmosphere at a rate not to exceed that from a No. 31 drill size opening. Such venting and liquid transfer shall be located not less than 50 feet from the nearest building.

 (e)  Tanks and cylinders shall be gauged and charged only in the open air or in buildings specially constructed or provided for that purpose.

 (f)  The maximum vapor pressure of liquefied petroleum gas which may be transferred into a tank or cylinder shall be in accordance with accepted practice in the industry for the particular type of gas being handled.

 (g)  Smoking by any person engaged in the transfer of liquefied petroleum gas into tanks or cylinders shall be prohibited during any stage of connecting, disconnecting or transfer.

   This section cited in 34 Pa. Code §  13.4 (relating to scope); and 34 Pa. Code §  13.96 (relating to filling of cylinders).