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  • The Analysis of Cracks in High-pressure Bends

    Posted: 06/25/2021 11:32:14  Hits: 24
    A high-pressure bend is a kind of pipe fitting used at the turning of the high-pressure pipeline. Among all the pipe fittings used in the high-pressure system, the proportion of a high-pressure bend is the largest, about 80%. Its quality including mechanical properties and dimensional...
  • Scouring and Wear of Elbows

    Posted: 04/06/2021 04:14:10  Hits: 10
    Pipelines, roads, railways, air and water transportation are the five major transportation. Among them, pipelines have the advantages of large transportation volume, small engineering volume, short transportation distances and low losses, which play an irreplaceable role in petroleum,...
  • High-temperature Steam Pipe Reducers

    Posted: 02/19/2024 08:27:42  Hits: 6
    Reducers are a common pipe structure in the steam and water pipeline system of thermal power plants. They are used at the joints of pipes with different diameters. According to different structural types, they are mainly divided into concentric reducers and eccentric reducers. Eccentric reducers have...
  • Cracking of Welding Seams of Eccentric Reducers in Ultra-high Pressure Steam Pipelines (Part Two)

    Posted: 01/29/2024 07:12:01  Hits: 2
    3. Historical failures and maintenance summary On June 25, 2006, cracking occurred at the same position as the reducer of the high-pressure steam main pipe of the No. 1 furnace. The cracking position was located on the fusion line of the small end’s welding seam of the reducer, and cracked from...
  • Cracking of Welding Seams of Eccentric Reducers in Ultra-high Pressure Steam Pipelines (Part One)

    Posted: 01/12/2024 05:10:29  Hits: 6
    Abstract: The cracking process of the reducer’s welding seam on the ultra-high pressure steam pipeline of the 220kt/an ethylene plant of PetroChina Dushanzi Petrochemical Company is described. The visual inspection, alloy analysis, on-site metallographic coating, and hardness testing of the reducer’s...
  • The Analysis of Stress of Pipe Fittings

    Posted: 11/15/2023 02:12:54  Hits: 31
    1.1 Elbows Elbows are mainly used to change the direction of pipes. There are two manufacturing and forming processes: one is the medium-frequency induction heating pushing process of steel pipe and the other is the press forming process of the steel pipe. There are differences between the two processes...
  • Stainless Steel Tees

    Posted: 10/25/2023 02:42:01  Hits: 5
    In the construction and engineering field, stainless steel tees have emerged as an indispensable component. These tees, made from a combination of iron, chromium, and other alloying elements, possess remarkable qualities that make them highly sought after in various industries. Firstly, stainless steel...
  • Pipe Tees

    Posted: 09/26/2023 03:52:54  Hits: 10
    Pipe tees are a fundamental component in pipe systems, serving as connectors for pipes of different diameters. These pipe fittings have a T-shaped design, with one inlet and two outlets at 90-degree angles. Pipe tees play a crucial role in directing the flow of fluids and ensuring efficient distribution...
  • Reasons & Countermeasures for Steam Superheating Furnace Gas Collection Pipe Caps

    Posted: 07/31/2023 07:56:12  Hits: 5
    4. Scanning electron microscope observation and energy spectrum analysis The black powder remaining in the gas collecting pipe after shutdown was analyzed by scanning electron microscope energy spectrometers, and the results are shown in Figure 7. It shows that the main component of the powder is Fe...
  • Inspecting Steam Superheating Furnace Gas Collection Pipe Caps

    Posted: 07/10/2023 07:38:16  Hits: 2
    Abstract: The material taken from the failure part of the gas collection pipe outlet pipe cap in the radiation chamber of the steam superheating furnace was inspected for the macroscopic morphology of the corrosion part, chemical composition, inclusions, metallographic structure, oxides, scanning electron...

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