What is the difference between a fully heated sleeve and a semi-heated sleeve?
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In the national unified budget quotas, there are terms such as \"fully heated sleeves\" and \"semi-heated sleeves\". What is the difference between fully heated sleeves and semi-heated sleeves? What are the differences in the construction methods? Under what circumstances are they used respectively? Are there any relevant pictures to show?
A full jacket is also known as a weld-hidden jacket, while a half jacket is called a weld-exposed jacket; for more details, you can refer to the petrochemical standard SH3040