1.6.3 Vaporizers shall have capacity as indicated in the drawing. It shall utilize electricity to heat the resistance heating elements which in turn shall heat the exchanger to vaporize the LPG. It shall be automatically controlled by a solid state controller. It shall be explosion proof and the pressure vessel shall be designed to JIS-8270 specifications. It shall be equipped with external relief valve, temperature sensors and protection, liquid level control and insulation jacket.