ISO 15614-3:2008规定了非合金铸铁和低合金铸铁生产和补焊的初步焊接工艺规范（pWPS）如何通过熔焊工艺试验进行评定。 ISO 15614-3:2008规定了焊接工艺试验的执行条件，以及在规定的变量列表范围内所有实际焊接操作的焊接工艺评定范围。 ISO 15614-3:2008适用于所有新的焊接工艺。然而，它不会使以前按照国家标准或规范进行的焊接工艺试验无效。如果必须进行附加试验以使鉴定在技术上等效，则只需对根据ISO 15614制造的试件进行附加试验- 3:2008. 应用标准可能要求进行其他测试。 ISO 15614-3:2008适用于根据EN 1561焊接非合金和低合金灰铸铁件；EN 1562；EN 1563；和EN 1564。 ISO 15614-3:2008的原则也适用于将铸铁焊接到钢或其他非合金和低合金铸铁材料上。

ISO 15614-3:2008 specifies how a preliminary welding procedure specification (pWPS) for production and repair welding of non-alloyed and low-alloyed cast irons is qualified by fusion welding procedure tests. ISO 15614-3:2008 defines the conditions for execution of the welding procedure tests and the range of qualification for welding procedures for all practical welding operations within the range of a defined list of variables. ISO 15614-3:2008 is applicable to all new welding procedures. However, it does not invalidate previous welding procedure tests made to former national standards or specifications. Where additional tests have to be carried out to make the qualification technically equivalent, it is only necessary to do the additional tests on a test piece made in accordance with ISO 15614-3:2008. Additional tests may be required by application standards. ISO 15614-3:2008 is applicable to welding non-alloyed and low-alloyed grey cast iron castings according to: EN 1561; EN 1562; EN 1563; and EN 1564. The principles of ISO 15614-3:2008 are also applicable for welding cast iron to steel or to other unalloyed and low-alloyed cast iron materials.