Last article we know the single layer welding of butt welding flange, today let’s see what’s multi layer welding of butt welding flange. When the butt welding flange is thick, multi-layer welding is required. When there is no backing plate, the first pass is similar to single side we ...

Because the butt welding flange is in an unnatural position, it is difficult to operate stably. At the same time, heavy welding torch and cable should be lifted to increase the difficulty of operation. In addition, the molten iron in the molten pool is easy to sag during overhead welding, which ...

Flange types As already described before, the most used flange types ASME B16.5 are: Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Below you will find a short description and definition of each type, completed with an detailed image. Most common flange types Types of ...

Maximum ratings for flanges conforming to ISO Standard 2229 dimensions and material specification ASTM-A105 Maximum pressure ratings for flanges conforming to ISO 2229 – Equipment for the petroleum and natural gas industries — Steel pipe flanges, nominal sizes 1/2 to 24 in – Me ...

Long high neck flange (LWN): long high neck flange is actually an expansion form of butt welding flange with neck. The flange neck is micro straight cylinder type, the height of the neck is 229mm (≤ DN100) or 305mm (> DN100), the flange neck is not processed with groove, and the processing of ...

1.When installing the connecting pipe flange on the vertical cylinder, first, ensure that the cylinder end surface unevenness meets the requirements, and then adjust the cylinder end surface horizontally to ensure that the cylinder is vertical. Draw a reference circle outside the opening line (t ...

In the domestic and international standards, there are clear requirements for the compression resistance of large stainless steel flange. Large stainless steel flange is generally divided into PN25, pn6, PN10, PN16, PN25, PN40, etc. PN10 and PN16 are commonly used. GOST/ГОСТ 12821-80 FLANGE PN4. ...

To answer this question, you should know about the flange rating. You must have heard about 150 class flange or 300 class or 600 class flanges. What is this class? Flange class is a combination of pressure-temperature rating that defines maximum allowable working gauge pressure of the flange. He ...

Flange connections are rarely damaged due to insufficient strength,but often leak due to poor sealing.Therefore,the sealing problem has become the main problem in flange connection,and the sealing surface and gasket of flange directly affect the sealing of flange,so it is necessary to introduce ...

Flange de-rusting method: immerse the flange in hydrochloric acid, the principle is to reduce the rust to iron, but there are dangers in this method. Hydrochloric acid is a corrosive substance, which is harmful to human body. During operation, pay attention not to touch the human body, and neutr ...

Flange sealing surface includes full face FF, raised face RF, raised face m, concave face FM, tenon face t, groove face g and ring connection face RJ. Generally, the concave convex surface MF, the tenon groove surface TG and the ring connecting surface RJ are used in pairs. Ring groove surface s ...

Stainless steel flanges are mainly made of two kinds of flat welding flange and butt welding flange, each with rings and rings. When flange dimensions are used to determine flange dimensions, the nominal diameter and nominal pressure of the flange must be known. The nominal diameter of the flang ...