with the development of the scale of gas use, some suburbs or rural areas have also begun to build gas pipelines. rural laying is mainly direct burial laying. direct burial laying does not require masonry trenches, earthwork, less civil engineering, prefabricated pipelines, less on-site installation

the following hs code apply to all kinds of steel pipe products, such as seamless pipe, welded pipe(erw pipe, ssaw pipe, lsaw pipe), stainless steel pipe, pipe fittings, etc.hs codesteel pipe products7326901900other industrial steel products

general mechanical equipment is lossy, and the production of seamless pipes also has a certain loss. the standard and loss rate of seamless steel pipe loss are still relatively large. the specific loss situation can be calculated, and what is the calculation method? let's find out together with the

steel pipes are used in a variety of ways, primarily to carry heavy loads in concrete pile casings, protect electrical wires, water and gas, and even support scaffolding. over time, these metal products wear out. it's best to have a proper maintenance program in place to ensure they last longer. we'

seamless pipe (smls) pickling process:1. definition of pickling: acids use chemical methods to remove oxide scale according to a certain concentration, temperature, and speed, which is called pickling.2. pickling classification: according to the type of acid: sulfuric acid pickling, hydrochlori