Carbon Steel DN200 ASTM A106 60mm PN1.6 Manhole Flange

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.