The primary Waste Heat Boiler (WHB) in an ammonia plant experienced cap leaking and the outer tube rupture after ten months since the last repair and replacement (total retubing).The leaking cap and the outer tube materials are low carbon steel SA-204 Gr.B and SA-209 Gr.T1a.The inappropriate vertical part of the leaked cap, which is 2.4 mm shorter

The current landscape of the core Internet technologies shows considerable centralisation with the big tech companies controlling the vast majority of traffic and services.This situation has sparked a wide range of decentralisation initiatives with blockchain technology being among the most prominent and successful innovations.At the same time, ove

INTRODUCTION: Although obesity is well recognized as a current public health problem, its prevalence and impact among pregnant women have been less investigated in Brazil.The objective of the study was to High Temperature Grease evaluate the impact of pre-obesity and obesity among pregnant women, describing its prevalence and risk factors, and thei

Privacy protection has become the key problem that blockchain technology must solve from theory to practice.There is a privacy protection requirement of on-demand disclosure in practical applications.Inspired by multicast secure communication mechanism, a privacy protection mechanism of on-demand disclosure on blockchain was proposed.This mechanism