... boiler field 2ISO9001-2000 ,first obtained national WNS Horizontal oil(gas)series steam boiler with an international classic three return ,all ... and light tube optimized combinztion of horizontal new boiler,fuel gas flow length , good heat transfer.1 All pull side butt welding ... is large enough ,can be full absorbed heat ,the exhaust gas temperature is low ,heat loss low ,ensuring maximum output and ...