PN1.6 manhole flange is produced and processed according to the drawing

The manhole flange is installed with various stainless steel filling tops, and serves as the access channel and vent for the staff during installation, maintenance, cleaning and maintenance! Generally, stainless steel manholes are made of steel plates of 304 and 316 materials as raw materials, and can also be made according to customer requirements. One manhole should be located near the right side of the oil inlet and outlet pipes, and try to make the manhole face the airtight opening of the tank chamber so as to facilitate the entry and exit of personnel, maintenance of oil tanks and ventilation pipes. Since the manhole is installed on the bottom ring of the oil tank, leakage prevention is particularly important. It is required that the joint surfaces of the two flanges must be flush without twisting. The reinforcing plate and flange should be cut on the whole steel plate as far as possible without splicing. The flange and cover plate are processed with sealing rings, and special attention should be paid to protection during construction. 3mm thick asbestos rubber gasket is used for sealing, no cracks are allowed. When installing the manhole cover plate to tighten the bolts, force diagonally to prevent the manhole cover from deforming.

Function or purpose

large closed containers (tanks, towers, pipelines) will have a hole for personnel or materials to enter and exit due to maintenance or other needs, and the channel is made of flange connection. It is closed with a blind flange when it is normal, and opened when it is overhauled.

Manhole classification

Round welded manhole, round thermal insulation manhole, rectangular manhole, rectangular thermal insulation manhole, flue ash outlet, atmospheric manhole, manhole with flat-welded flange with swing cover, butt welding with neck with swing cover Flange manhole, vertical hanging cover with neck flat welding flange, vertical hanging cover with neck butt welding flange manhole, horizontal hanging cover plate flat welding flange manhole, horizontal hanging cover plate butt welding flange manhole , Oval revolving cover quick opening manhole, revolving arch cover quick opening manhole, atmospheric hand hole, plate flat welding flange hand hole, neck flat welding flange hand hole, neck butt welding flange hand hole, rotation Cover with neck butt welding flange hand hole, normal pressure quick opening hand hole, rotary cover quick opening hand hole, pipe sight glass, etc.

      Hebei Zexu Pipeline Manufacturing Co., Ltd. has a complete production and operation management system and is one of the first companies in the industry to pass the ISO9001 quality management system certification, HSE environment, and occupational health and safety management system certification. The company has three manufacturing branches for steel pipes, pipe fittings, and boiler vessels, and has functional departments such as marketing department, technology department, purchasing department, production department, inspection department, quality assurance department, and comprehensive department. It has established a complete and complete set of quality, Safety, production and management procedures.
      After years of development, Hebei Zexu Pipeline Manufacturing Co., Ltd. has a nationwide business network and radiates to the United States, India, Pakistan, Russia, the Middle East and other countries and regions.
      Hebei Zexu Pipe Manufacturing Co., Ltd. has always adhered to the business philosophy of honesty, innovation and cooperation to promote development, customer satisfaction and trust as the foundation, sustainable development as the goal, relying on scientific management to improve quality, reduce costs, and create brands. For many consecutive years, it has been awarded as "Advanced Unit for Safety Production Standardization Construction", "Hebei Province Industrial Cluster Leading Enterprise", "AAA Credit Enterprise", "Hebei Province Metal Products Industry Leading Enterprise", "Hebei Province Key Employment Service Enterprise", "Star Enterprise", "Top 50 Industrial Enterprises in Cangzhou City", "Famous Trademark of Hebei Province", "Contract-abiding and Promise-keeping Unit", "Recommended Supplier of Main Auxiliary Equipment for Thermal Power Units" and other honorary titles.