Abstract: An enclosure for containment of chemical distribution lines and methods for installation and modification of devices installed along such chemical distribution lines are provided. The enclosure contains two or more separable portions. Openings within the enclosure through which the chemical distribution lines or conduits extend are formed along a boundary between two separable portions. Devices, such as valves, regulators, gauges and filters may be installed along a conduit before the enclosure is formed around the portion of the conduit containing the installed devices. The enclosure may therefore be made smaller, because excess working room within the enclosure is not needed. Installed devices may be modified by removing portions of the enclosure to expose the relevant devices. The conduit portion containing the devices may be removed for device modification, before re-assembly of the enclosure around the conduit portion.

Abstract: A union lock for maintaining a union between two conduits is disclosed. In a first embodiment, the union lock includes a pair of bridgepieces. Each of the bridgepieces includes an elongated member. A substantially semicircular flange is coupled to each end of the elongated members. A tab is coupled to each end of the flanges, each tab having a hole formed therein for receiving a connector. During use, the bridgepieces are placed around the conduits and secured to each other by placing the connectors in the holes in the tabs. By tightening the connectors, the elongated members may be compressed against the conduits and against a union nut joining the conduits, thus maintaining the union. In a second embodiment, the union lock includes a pair of elongated members. A substantially circular flange is coupled to each end of the elongated members. A tab is coupled to each end of the flanges, each tab having a hole formed therein for receiving a connector.