ASME B16.38 pdf download Large Metallic Valves for Gas Distribution Manually Operated, NPS 2 1 / 2 (DN 65) to NPS 12 (DN 300), 125 psig (8.6 bar) Maximum 2.7 Gas Resistance All materials, including lubricants and sealants, shall be resistant to deterioration when exposed to fuel gases such as listed in para. 1.2. 2.8 Temperature Resistance The materials used...