Link form: thread, flange, welding and the folder, a carbon steel materials, stainless steel, alloy steel, chrome molybdenum steel, cold steel, ductile iron and other special steel.

• 连接形式：螺纹、法兰、焊接及对夹，材质有碳钢、不锈钢、合金钢、铬钼钢、低温钢、球墨铸铁及其他特殊钢。