（DGR 3.2.2.4.1 で言及している圧力はゲージ圧でしょうか?）
Q.
DGR 3.2.2.4.1 Gases of Division 2.2, are not subject to these Regulations if they are transported at a pressure less than 200 kPa at 20℃ and are not liquefied or refrigerated liquefied gases. の “pressure” はゲージ圧力でしょうか? (2019.4.30)
A.
違います。 ゲージ圧力ではなく「絶対圧力」(Absolute pressure) です。
DGR 3.2.1.4 を参照してください。
“3.2.1.4 Pressures of all kinds relating to receptacles (such as test pressure, internal pressure, safety-valve opening pressure) are always indicated in gauge pressure (pressure in excess of atmospheric pressure), however, the vapor pressure of substances is always expressed in absolute pressure.” となっています。
Copyright (C) 2003 Kinoshita Aviation Consultants All rights reserved.