gas pipeline condensate

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<!-- image --> <!-- image --> ## OXYGEN-FUEL GAS WELDING AND CUTTING - (K) Provide good natural or forced ventilation when oxygen piping is installed in the same tunnel, trench or duct with fuel-gas pipelines. - (L) Drain low points in piping that carries moist gas into drip pots, constructed to permit pumping or draining out the condensate, at necessary intervals. - (M) Install drain valves having outlets normally closed with screw caps or plugs for draining low points in piping systems. - (N) Case or jacket pipes leading to the surface of the ground where necessary to prevent loosening or breaking. - (O) Install gas cocks or valves for all buildings at points where they will be readily accessible for shutting off the gas supply to these buildings in an emergency. - (P) Install a shutoff valve in the discharge line from the generator, gas holder, manifold or other source of supply. - (Q) Thoroughly blow out assembled piping with air, nitrogen or carbon dioxide to remove foreign materials. - (R) Blowout oxygen piping using oil-free air, oil-free nitrogen, or oil-free carbon dioxide: - NOTE: Air or inert gas may be used with other piping. - (S) Purge oxygen lines, using oil-free air, oil-free nitrogen, or oil-free carbon dioxide. - (T) Use pressure relief devices set to function at not more than the design pressure of the systems and that discharge upwards to a safe location. - (d) When installing piping systems you must not: - (A) Install shutoff valves in safety relief lines in such a manner that the safety relief device can be rendered ineffective. - (B) Have uncapped openings of flammable gas lines or other parts of equipment being purged of air or gas near open lights or other sources of ignition. - (C) Use open end valves or petcocks except when drips are located outdoors, underground, and not readily accessible. - (D) Use valves outdoors, underground or in areas not readily accessible unless they are equipped with a means to secure them in the closed pos…

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\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ## (3) Installation . - (a) You must install and maintain distribution lines in a safe operating condition. - (b) Piping located inside or outside of buildings may be placed above or below ground. You must run all piping as directly as practicable, protected against physical damage, proper allowance being made for expansion and contraction, jarring and vibration. You must locate pipe laid underground in earth below the frost line and protected against corrosion. After assembly, you must thoroughly blow out with air or nitrogen to remove foreign materials. For oxygen piping, you must use only oil-free air, oilfree nitrogen, or oil-free carbon dioxide. - (c) You must install only piping which has been welded or brazed in tunnels, trenches or ducts. Shutoff valves must be located outside such conduits. Oxygen piping may be placed in the same tunnel, trench or duct with fuel-gas pipelines, provided there is good natural or forced ventilation. - (d) You must drain low points in piping carrying moist gas into drip pots constructed so as to permit pumping or draining out the condensate at necessary intervals. You must install drain valves for this purpose having outlets normally closed with screw caps or plugs. You must not use open end valves or petcocks, except that in drips located out of doors, underground, and not readily accessible, valves may be used at such points if they are equipped with means to secure them in the closed position. You must case or jacket pipes leading to the surface of the ground where necessary to prevent loosening or breaking. - (e) You must provide gas cocks or valves for all buildings at points where they will be readily accessible for shutting off the gas supply to these buildings in any emergency. Underground valve boxes or…