Industrial News about Pipe Fitting Industry

Abstract During the operation of a nuclear power plant, repeated leakage occurred at the outer casing elbow of the double-walled pipe in the hydrogen supply system. To determine the cause, the cracked elbow was examined through macroscopic inspection, microstructural analysis, chemical composition testing,...

Abstract During maintenance at a power plant, it was discovered that the hardness in the welded joint area of a P91 main steam elbow was low. During construction, it is necessary to remove the heat-affected zones (HAZ) at the elbow's inlet and outlet welds to prevent the effects of repeated high-temperature...

Abstract To investigate the leakage issue at the elbow section of the surge pipe located in the top cover of a large hydropower station, PT (penetrant testing) was conducted on the weld seams, along with physical and chemical analysis of the base material. The findings revealed that the immediate...

  Erosion observations were conducted at various angular sections (i.e., 30°, 45°, 60°, and 90°, as shown in Figure 3-1) and at different positions on the bend wall (i.e., inner arch side, side wall surface, and outer arch side). As illustrated in Figure 3-2, the sample...

Abstract A leak was detected in the reducers of the high-pressure heater located in the conventional island of a nuclear power plant. The chemical composition, microstructure, hardness, fracture morphology, and elemental distribution of the reducers in the liquid level switch were analyzed through macroscopic...

ASTM A106B pipeline steel was used for the base material, with 2.4 mm ER70S-G solid wire selected for welding. Butt welding of the steel pipes was performed using two methods: (1) a combination of Gas Tungsten Arc Welding (GTAW) and Shielded Metal Arc Welding (SMAW), (2) GTAW alone. No pre-weld or post-weld...

Abstract This paper examines the manufacturing process and production workflow of expansion joints and telescopic cylinders in a new-generation coal powder pipeline. It also discusses their structural characteristics, processing techniques, and key manufacturing challenges.   Introduction Historically,...

Abstract Non-metallic expansion joints offer excellent corrosion resistance, high tensile strength, and cost-effectiveness, making them widely used in wet flue gas desulfurization systems. However, due to the corrosive nature of flue gases and construction-related factors, expansion joints are prone...

This article provides practical recommendations for improving the quality of pipe fittings based on an analysis of key production issues identified through statistical analysis and the 5M1E method. The recommendations focus on key stages, including design, procurement, and manufacturing, to improve...

The forming methods and material types for pipe fittings used in oil and gas pipelines are diverse and complex (Table 1). However, domestic manufacturers lag behind their international counterparts in critical areas such as material selection, production capacity, automation, and advanced testing...

Abstract This paper examines the indispensable role of pipe fittings in oil and gas pipeline engineering, emphasizing the stringent demands they must meet under extreme conditions, including high pressure, elevated temperatures, and corrosive environments. Essential components such as elbows, tees,...

Abstract Several factors influence the electrodeposition process on the inner walls of pipe fittings. This paper examines the impact of plating solution properties and process conditions on the quality and efficiency of electrodeposition in these pipe fittings.   Properties of Plating Solutions...