A105N Carbon Steel Cap, ASME B16.11, Forged, 12 Inch, 3000LB, Thread Female NPT

Cap, casing) cap, also known as head, plug, cover, pipe cover, stuffy head, welded at the end of the pipe or installed on the outer thread of the pipe end to cover the pipe fittings. Used to close the pipe, the function is the same as the pipe plug.
The form of blind plate is close, but the blind plate is detachable and the welded pipe cap is not detachable. The cap comprises a convex cap, a conical shell, a variable diameter section, a flat cover and a tight port.
Convex tube cap includes: hemispherical tube cap, elliptical tube cap, disc tube cap and ball crown tube cap. From the point of view of force, the hemispherical tube cap is not good, but from the point of view of manufacturing difficulty, it is easy to manufacture.

Pipe cap is an indispensable part of pressure vessel equipment in many industries of chemical industry and atomic energy. The pipe cap is the end cover on the pressure vessel and is a main socket part of the pressure vessel. The function is sealing. One is to make the upper and lower bottom of the tank pressure vessel, the other is that the pipe is over and is not ready to extend forward, so seal the pipe in the form of welding with a pipe cap. Similar to the function of the pipe cap products have blind plate and head, matching pipe fittings have pressure vessels, pipes, flanges, elbows, three links, four links and other products. The quality of the head is directly related to the long-term safe and reliable operation of the pressure vessel.

Pipe cap uses: water, beverage, beer, food, petrochemical, nuclear power, machinery, medical equipment, fertilizer, shipbuilding, waterproof treatment, pipe, etc. The weld direction requirement is only radial and circumferential. The large cap may cancel this requirement in the future. The splicing distance should be required, greater than 3δ, And not less than 100 mm (the welding heat affected zone is a high stress zone, And the chemical composition in this area will be burned. So avoid high stress zones, The area is related to thickness. Based on practical experience, Stress attenuation length greater than 3δ, And not less than 100 mm). But refrigeration is hard to meet, It has its particularity. The assembled head, Spliced welds shall be subjected to 100% radiographic or ultrasonic testing, The qualification level follows the equipment shell. The final weld inspection grade and proportion are the same as the equipment shell, High waste. Example: if the equipment shell is 20% detection, III qualified. And the smug splice weld and the final weld are III qualified, The coefficient of welded joint is 0.85; If the case is 100% tested, II qualified. And the smug splice weld and the final weld are II qualified, Welding joint coefficient is 1, so stuffy splicing although 100% detection, But the eligibility levels are different, Follow the shell of the equipment.