Select sae flange there are many kinds of sealing surfaces. There are five forms of sealing surfaces. One of them is free. All of them use one project. Numerous flange forms But what is our cognition of giving up the choice of design institute?

MFM surface and TG surface are inconvenient to match. In large-scale projects, due to mistakes in purchasing sealing surfaces, it is easy to cause loss of construction period and cost, and the installation and maintenance efficiency of the two sealing surfaces is extremely low. The sealing surface is extremely difficult to repair and replace the sealing surface. It is extremely inconvenient to replace the sealing surface. The thickness of the sealing surface is closely related to the sealing effect

HG/T20583-1998 edition is an appendix for flange seal selection proposal, which gives the proposal corresponding to media and working conditions However, this appendix itself comes from the 97 edition of the guide for the selection of common gaskets for petrochemical equipment in the former Sinopec Equipment Design and Technology Center Station. The design concept more than 20 years ago has long been outdated HG/T20583-2011 standard changed into data appendix with reference

In recent ten years, a large number of large-scale coal chemical and petrochemical engineering projects have fully proved that the RF sealing surface can be selected under the condition of not harsh working conditions; The selection of RF sealing surface can fully meet the sealing requirements under harsh working conditions Many engineering projects or large design institutes usually use CL600 or CL900 demarcation lines to uniformly stipulate They only choose RF/RJ surfaces but only non-metallic or lining sae flange Radio frequency surface on low pressure pipeline Whether it is installation, maintenance and application, or optimization of cost and schedule, the effect is very good RF sealing surface is rarely extruded (whether it is extruded or not is more important for installation level) I strongly advise you to do so

Therefore, we believe that the times are changing, and our technical ideas should be updated. Any designer should not stick to the rules but actively learn and adapt

The double-flange remote differential pressure transmitter consists of a differential pressure transmitter capillary and a double sae flange with a sealed diaphragm Sealed diaphragm is used to prevent media from entering the differential pressure transmitter directly in the pipeline. It is usually filled with liquid to measure the flow rate, liquid level, density and pressure of liquid gas and steam

Maintenance double sae flange liquid level transmitter

1.Check the double sae flange liquid level transmitter

① Double flange inspection: check whether the sealing performance of the connection part between double flange and equipment is good; Whether there is liquid leakage in the capillary tube at the connecting part between the flange and the capillary tube and the capillary tube at the connecting part of the transmitter; Whether the flange diaphragm has any bad conditions such as deformation, damage, corrosion and scaling

② Check the transmitter

Appearance inspection of transmitter: Check whether the transmitter shell is damaged or corroded, etc., and deal with the problems found in time

B. Internal inspection of transmitter: Open the outer cover of transmitter and first check whether the sealing ring is damaged. If it is damaged, it should be replaced in time; Check whether the circuit board and other components are in good condition