Pipeline fittings, such as: elbow, size head, three links, caps, bends and so on. These fittings are mainly used in petroleum, chemical, power, shipbuilding, construction industries and other fields. For example, some indoor heating pipes should be connected with different diameters, some should be connected to diverted connections, and some should be diverted and connected. They can use small and large heads (known as foreign diameter pipe), elbows and three-way pipe fittings. Of course, some of these are castings, and some are made from pipes as raw materials through processing methods.
First of all, let me introduce the elbow. Elbow is now the international standard is the American national standard ansi b16.9 and 16.28. The standard outer diameter range is 1/2′′~ 80′′, generally 24′′ are all made of seamless steel pipe as the raw material, 26′′ to 80′′ are all stamped and then welded. Maximum wall thickness 60mm, the minimum is 1.24mm, the most used steel is carbon steel (20#), alloy steel and stainless steel, a total of 24 steel types.Crmo steel used on the boiler is like 15cr, and the amount is larger.
Tees, with outer diameters in the range of 2.5"-60" and 26"-60" for welded tee. Wall thickness 28-60mm. The size of the head size, conventionally speaking the bulk specifications, then the small head specifications, the bulk of the smallest 0.75′′, the smallest head of 0.5′′, the largest head of 60′′, the largest head of 48′′, 20-60′′ welded, wall thickness 2.8 -4.5mm.