& does relevant recommendations: 【 compensator, bellows compensator, air duct in a flexible rubber joint 】 is gongyi city full state pipeline equipment co., LTD. The main business of our company has been made as a special equipment manufacturing license and ISO quality management system certification of qualified companies, the company management concept: the factory in order to "customer needs is our goal" principle, wholeheartedly for the customers with excellent products, reasonable prices, fast delivery cycle, professional technical support and perfect after-sales service. In the future, full state is full of confidence and hope, was determined in a more high quality brand and good service, sincere cooperation with customers at home and abroad, to do the northern area of the thermal compensation smoke duct equipment industry's first brand.


The introduction of manhole
Manhole section consists of a short tube, cover with a piece of blank plate, boiler, drain, for people in and out of repair is divided into emergency relief manhole, explosion-proof fire breathing manhole manhole, roof manhole, tank wall and core manhole, etc.
Manhole section consists of a short tube, cover with a piece of blank plate, boiler, drain, for people in and out of repair is divided into emergency relief manhole, explosion-proof fire breathing manhole manhole, roof manhole, tank wall and core manhole, etc., generally composed of 304316 L stainless steel or carbon steel production.
Manhole for molding products, usually for 600 mm diameter. Manhole center distance general floor is 750 mm. To facilitate staff during installation, cleaning and maintenance in and out of the tank or ventilation.
Manhole is installed on top of the tank safety emergency ventilation device, usually with flame damper, using mechanical breather valve, can avoid the accident caused sharp overpressure or vacuum in tank and tank damage and accident, security fire effect, is to protect the safety of tank device, especially suitable for the storage of materials with nitrogen gas cap vault atmospheric tank. Emissions with constant pressure and constant pressure suction, flexible open and close, fire safety, compact structure, good sealing performance, safe and reliable.
Manhole should be a near in and out of the tubing on the right side, and try to make the manhole MMB are pot room, so, repair tank and ventilation to take over the use of personnel entering and leaving.
Manhole hand hole is narrow, the setting is to installation, disassembly, cleaning and maintenance equipment internal devices. Hand hole and manhole in the same structure. Hand hole is 150 ~ 250 mm in diameter, and should make the workers wear gloves and hold tools hand can easily through, standardized the nominal diameter of 6, DN250 two kinds. When the equipment more than 900 mm in diameter, should open manhole.