L360N Seamless Steel Pipe Site Entry Specific Requirements. L360N Seamless Steel Pipe: Oil, gas, or water extracted from underground is transported through pipelines to oil and gas industry enterprises. L360N Seamless Steel Pipe includes seamless pipes and welded pipes, with pipe ends available in flat, threaded, and socket ends; connection methods include end welding, coupling connections, and socket connections, etc. What are the requirements for the appearance quality of pipeline steel pipes, pipe joints, and fittings in terms of specifications, tolerance, performance regulations, and planning requirements on the construction site? The surface of pipe joints and fittings should be free of cracks and indentations or protrusions that hinder use; rubber ring flexible joints for ductile iron pipes should be selected.