Submerged arc welding is an arc welding under flux layer combustion method. Welding arc between the wire and the weldment burning heat of the arc and arc welding wire ends near the base metal and solder...
Frequency welded pipe production process, affecting the quality of the elements have more than one pipe, the main raw materials, welding technology and roll count which is beginning to adjust. Key to...
High-pressure alloy pipe deformation strengthening is using the method of deformation of steel reinforcement. Also known as the strain hardening or work hardening. The strength of the material at the...
According to the technological requirements of different manufacturers, precision tubes length measurement systems with a variety of length measurement methods. There are the following: 1, The grating...
Spiral weld seam has the following several types: 1. Spiral strip end weld: steel head that spiral weld on steel or steel weld head and tail; 2. Two spiral butt weld: spiral cut is to link the two together...
Production process of hot rolled steel pipe: 1. Main production process (main inspection process) of hot rolled seamless steel pipe: pipe blank preparation and inspection > pipe blank heating >...
Spiral pipe factory should be done before the mechanical performance test and flattening test, and flaring test, and to achieve the standard requirements. Spiral steel pipe quality inspection method is...
Straight seam welded pipe surface quenching and tempering heat treatment is usually carried out by induction heating or flame heating. The main technical parameters are surface hardness, local hardness...
ASTM A350 (ASME SA350) is the standard specification for carbon steel and low alloy steel forged flanges and flanged fittings for low temperature services. Common use grade is ASTM A350 LF2 Class 1, corresponding...
General Properties Alloy 330 (UNS N08330) is an austenitic nickel-iron-chromium alloy developed to provide excellent resistance to carburizing and oxidizing atmospheres at elevated temperatures. With...
The three-layer polyethylene (3LPE) coating anti-corrosion steel pipe and the two-layer polyethylene (2LPE) coating anti-corrosion steel pipe both belong to the anti-corrosion steel pipe. The...
In May this year, the purchasing managers' index (PMI) of the steel sector in China's Hebei Province rose to 39.7 percent, up 2.9 percentage points month on month, as announced by the Hebei Province...
BEIJING, May 26 (Reuters) - Steel rebar prices in China hit their lowest in three years this week, underscoring flagging growth in the world's second-largest economy, particularly in its weak property...
In the January-April period of this year, China's steel sheet/plate exports totaled 18.08 million mt, up 50.7 percent year on year, according to the Chinese customs authorities. In April alone, China...
China’s economic recovery falters Iron ore has been on a downtrend for almost two months. Its price on the Singapore Exchange fell to a year-to-date low of $94.20/t last week, down more than 20%...
Trade data point towards reglobalisation Since 2006, there have been no significant changes in the trend towards more globalised and open trade, according to analysis by ING Groep NV. Although...
Ovako AB is completing a multimillion-dollar investment at two mills (Hofors and Hällefors) in Sweden to produce forged-rolled black bar. The company’s production and R&D teams have implemented...
1. Weld the flange to the pipe and cool it to ambient temperature before installing the valve onto the flange. Otherwise the high temperatures generated by the weld can affect the performance of the resilient...
A ductile iron pipe is made of a kind of cast iron, carbon and silicon alloy, is an iron ore stone blast furnace smelting product. According to the different forms of carbon in pig iron, it can be...
Valves are used to control the flow of gases, liquids and granular solids. They come in many types, sizes, materials, pressures and temperature ratings, and means of actuation. Globe valves...