Page 2 of Industrial News about Pipe Fitting Industry

Abstract In a thermal power plant project, small-diameter serpentine heat exchanger tubes were fabricated from 20G steel with dimensions of Ø25 × 3 mm, a bend angle of 180°, and a bend radius of 27.2 mm. The tubes were formed using a CNC top-roll tube bender. However, during the...

Abstract: A numerical simulation study of pipe cap hot forming was conducted using DEFORM-3D finite element analysis software to determine the optimal heating temperature and dimensions of the pipe cap blank. The results offer valuable guidance for the design and manufacturing of pipe caps. Pipe...

Abstract: A leakage occurred in the elbow section of the sampling pipeline connected to the liquid level gauge of a high-temperature reheat steam drain tank in a thermal power plant during normal operation. The root cause of the elbow failure was investigated using macroscopic observation, chemical...

This study investigates the cause of fracture in the reheat hot section drain pipe elbow of a 1000 MW ultra-supercritical thermal power unit on the B-side. A series of experimental analyses, including macroscopic morphology, metallographic structure, hardness, and mechanical property tests, were...

Abstract: A crack was found in the 321 stainless steel elbow of the condensate pipeline serving the hydrogen production unit at a petrochemical plant, resulting in medium leakage. The failure was investigated through metallographic examination, scanning electron microscopy, energy-dispersive...

Abstract: To enhance boiler safety, this paper analyzes a failure incident in the main steam pipe elbow of a self-contained power station boiler at a chemical fiber plant, caused by the improper use of carbon steel, which resulted in fracture and leakage. Through macroscopic inspection, wall...

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...