Their chief merit lies in the fact that they can be assembled without welding this explains their use in extremely high pressure services, particularly at or near atmospheric temperature, where alloy steel is essential for strength and where the necessary post weld heat treatment is impractical. Threaded flanges are unsuited for conditions involving temperature or bending stresses of any magnitude, particularly under cyclic conditions, where leakage through the threads may occur in relatively few cycles of heating or stress; sea welding is sometimes employed to overcome this, but cannot be considered as entirely satisfactory.
THREADED FLANGES are confined to special applications
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Product description WELDING NECK RISE FACE FLANGE(WNRF) Stainless steel weld neck flange are popularly used in excessive stress applications, with their capability to provide assisting power along with stress distribution. raised face weld neck flange are circumferentially ...
Come From WENZHOU HUASHANG STEEL CO.,LTD
Product description Socket welded flange is a flange with one end welded with steel tube and the other end connected with bolts. It is suitable for connecting pipe with small diameter, high pressure and high temperature, usually used in the pipelines with PN≤ 10.0mpa and ...
Come From WENZHOU HUASHANG STEEL CO.,LTD
The three-piece low-temperature ball valve socket weld belongs to the three-piece low-temperature ball valves series. The valve body is composed of three sections. The two ends are socket welding connection surfaces. After special low-temperature treatment, the temperature ...
Come From Hebei Leading Metals & Piping Industries Co., Ltd.