常在一些资料上看到UPVC管以及PVC-U管，请教各位它们是一种材质吗?
如果不是有何区别（主要是在用途上)?谢谢。

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UPVC 全称聚氯乙烯，英文名为Unplasticized Polyvinal Chloride

PVC-U used to be called uPVC (for unplasticised PVC) but in 1990 the name was changed to conform to the international naming conventions for polymers. This was so that polymer databases would work correctly.

The standard international name of any plastic is now in two parts: the basic material name is given first and any special properties are given after a hyphen, ALL THE LETTERS ARE IN CAPITALS!

Low Density Polyethylene (old name - LDPE), Linear Low Density Polyethylene (old name - LLDPE) and High Density Polyethylene (old name - HDPE) are all types of polyethylene (PE) but would not appear to be such if indexed alphabetically in a database.

The new names have the polyethylene name first and the special properties second. The new abbreviations are Low Density Polyethylene (PE-LD), Linear Low Density Polyethylene (PE-LLD) and High Density Polyethylene (PE-HD). This means that families of polymers are kept together in a database.

The new correct name for uPVC is therefore PVC-U where PVC is the base polymer and the U refers to the unplasticised version of PVC. All the letters in the name are in upper case and PVC-u is incorrect!

If you see someone using PVC-u you now know that they are incorrect and dont know what they are talking about. Keep an eye out for it - even the most respectable people make the mistake.

UPVC相对于PVC-U卫生条件差些

请教Eagles

这种说法有什么依据吗？？

两者没有什么本质的区别，可以说是一中物质，只是在翻译的时候习惯的不同，造成了现在市场
上出先两中表示方式的原因！都是聚氯乙烯。

你说的真的假的？

我同意这种说法，那就是是同一种管材。只是叫法不同而也。

我同意，其实是一种管材的两种不同叫法而已。

是一样的，叫法不同而已，我先前也是认为有区别，但后来问我师傅才知道的，
我师傅很牛的，呵呵