I. Standard OverviewASTM A178 is a technical specification developed by the American Society for Testing and Materials (ASTM) for resistance welding of carbon steel and carbon-manganese steel boiler tubes and superheater tubes. This standard primarily covers small-to-medium diameter steel tubes used

DIN 1629 significa "Tubos redondos de acero sin costura, acero de grano fino soldable para aplicaciones específicas".El núcleo de esta norma es la especificación de una serie de tubos de acero sin costura con excelente soldabilidad y buenas capacidades de conformado en frío. Estos tubos están fabric

The Core Control Mechanism of the License System: How to Precisely Combat "Paying for Others"The steel export license system is not simply a piece of paper, but a crucial node embedded in a multi-departmental collaborative system involving customs, taxation, foreign exchange, and commerce. Its effec

I,Main Advantages of Container ShippingRevolutionary Efficiency ImprovementStandardized Operations: Globally unified size standards (such as 20-foot and 40-foot containers) enable seamless integration of sea,rail,and road transport,reducing transshipment time,Accelerated Automation: Port gantry

1. Chemical CompositionSimilarities: The requirements for carbon, manganese, phosphorus, and sulfur content for Grade A and Grade B are uniformly specified in the standard for each grade, regardless of manufacturing process.Potential Differences: In actual production, the chemical composition of the