Welding of low-temperature steel pipes (A333-6) in LPG projects In liquefied projects, pipelines generally use low-temperature pipes (A333-6). The process for welding this material is complex, and there is limited experience with welding these steel pipes domestically. To ensure the quality of welding for this material, we need to select welding materials based on its characteristics, [...]
Classification of Pipeline Levels 1. Overview In current Chinese regulations, industrial pipeline classifications can be divided into two systems. One is the classification system for pressure pipelines, involving regulations such as the Safety Technical Supervision Regulations for Pressure Pipelines – Industrial Pipelines TSG D0001-2009 and the Rules for Licensing Design of Pressure Vessels and Pressure Pipelines [...]
Design Points of Cryogenic Pipelines Abstract: In petrochemical enterprises, cryogenic pipelines are frequently used. Generally speaking, pipelines conveying materials below +5°C are referred to as cryogenic pipelines. However, in practice, low-carbon steel can be normally used within the range of +5°C to -20°C, as the steel is mainly in a ductile state under these conditions. When [...]
Low Temperature Pressure Vessels Currently, there are no specific standards for low temperature pressure vessels in our country. JB4732 does not differentiate between low temperature and normal temperature boundaries. ★ For low temperature shell-and-tube heat exchangers, see Appendix A of GB151-1999. ★ For low temperature pressure vessels, see Appendix E of GB150.3-2011 (in the old version [...]
Tubing Definition and Knowledge Tubing is a hollow section with no welds from end to end. Steel pipes, which have hollow sections, are extensively used for conveying fluids such as oil, natural gas, gas, water, and certain solid materials. Compared to solid steel bars like round steel, steel pipes with the same bending and torsional strength [...]
Discussion on the Heat Treatment Process of 12Cr1MoV Steel for High-Pressure Steam Pipes Abstract: The high-pressure steam pipes of steam turbines are an essential component of the entire unit, and the selection of tubing material and heat treatment processes directly impact the service life of the entire unit. Our factory uses 12Cr1MoV material for high-pressure [...]
Welding of high-pressure boiler heated tubes in power plants— Butt welding of tubes I. Technical status of base metal 15CrMo steel is a low-alloy heat-resistant steel with a pearlitic structure. It has high thermal strength (σb ≥ 420 MPa) and oxidation resistance at high temperatures, along with some resistance to hydrogen corrosion. Its delivery condition is [...]
Selection of Wall Thickness and Pressure Resistance Calculation for Seamless Steel Pipes For seamless steel pipes, given the outer diameter and wall thickness, we can calculate the maximum pressure the pipe can withstand. Alternatively, if the outer diameter and pressure are known, we can determine the most economical and suitable wall thickness. These two scenarios are [...]
1. Introduction 1.1 Overview As a key type of steel pipe product, pressure-bearing seamless pipes have extensive applications in various industrial fields. They are widely used in the oil and gas industry, chemical industry, as well as thermal equipment and energy sectors. Standardization of pressure-bearing seamless pipes is an important means to ensure their quality and [...]
Analysis of the Impact of Carbon Emission Rights on the Steel Industry Introduction 2024 is a pivotal year for the steel industry, as it grapples with declining demand from the real estate sector and broader economic challenges. Amidst these narratives, an understated event on September 10—Shougang Corporation's announcement to transfer 148,716.9 tons of carbon emission rights—could [...]