Qingming Festival, also known as outing Festival, Xingqing Festival, March Festival, ancestor worship Festival, etc., is at the turn of mid spring and late spring. Qingming Festival originated from the ancestor beliefs and spring festival rituals in ancient times. It has both natural and humanistic connotations. It is not only a natural solar term, but

The stainless steel flange should have sufficient strength and should not be deformed during the tightening process. When installing the stainless steel flange, the flange cover should be smooth and clean, and oil stains and rust spots should be carefully removed. The gasket should have good oil resistance, aging resistance, good elasticity and mechanical strength.

Raised surface (RF): The surface is a smooth flat surface, and dense waterline can also be machined. The sealing surface has a simple structure, is convenient to process, and is convenient for anti-corrosion lining. However, this kind of sealing surface gasket has a large contact area, and the gasket is easy to squeeze to both

Flange is a commonly used part in engineering, covering a wide range of fields, because it is an indispensable part of piping design, piping fittings and valves. The difference between standard flanges and non-standard flanges is mainly reflected in the following aspects: Flange specifications The national standard flange is a general-purpose component. The outer diameter,

Rubber joints generally use two types of flanges: cast flanges and forged flanges. According to the connection mode, rubber joints are divided into three types: loose flange type, fixed flange type and threaded type. When choosing a matching flange for rubber soft joints, first choose the size of the flange and whether the working pressure

Experience identification technology of pipe fittings 1. Centripetal ball fitting the normal centripetal ball fitting, the inner and outer ring raceway shall be without spalling and serious grinding marks, and a bright arc groove shall be maintained; All balls should be rounded, without spots, cracks and spalling; When using a hands in the inner ring,

The FIGURE 8 BLIND FLANGE is a kind of pipe parts, mainly for convenience of maintenance. You can paint the upper part of “8” into black in the specific shape. It’s half blind, half is a ring. It is commonly used for the pipe flange which needs to change the process. The material mainly includes carbon

The full name of International Women’s Day (IWD) is United Nations women’s rights and international peace day. In China, IWD is also known as international working women’s day, March 8 and March 8 women’s day. It is a festival set up on March 8 every year to celebrate Women’s important contributions and great achievements in

The first month is the first month of the lunar calendar. The ancients called “night” as “Xiao”. The fifteenth day of the first month is the first full moon night of the year, so the fifteenth day of the first month is called “Lantern Festival”. According to the Taoist “Sanyuan”, the 15th day of the

DN is the two letters that we often see in a list of everyday pipe fittings or articles. In fact, the meaning of the expression is the nominal standard of the metric unit, not the actual measurement value (details see gb/t1047) standard; NPS refers to the nominal size of an inch unit tube, as is the meaning