Regarding the thickness specifications for titanium heat exchange tubes per GB/T 3625-2007
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The required thickness for titanium and titanium alloy heat exchange tubes as specified in GB/T 3625-2007 is already given. The customer’s requirement is for a specification of φ32x1.2mm, which does not match the standard thickness of 1.25mm. Can we simply state 1.2mm in the quality certificate, citing GB/T 3625-2007 as the standard?
No. If the thickness required by the customer (1.2 mm) does not match the thickness specified in the GB/T 3625-2007 standard (1.25 mm), the difference between the actual thickness of the product and the standard value should be clearly indicated. The actual specifications of the product (φ32x1.2mm) must be clearly stated in the quality certificate, along with an explanation of the specific discrepancies between these specifications and the GB/T 3625-2007 standard. When citing the standard, it can be stated as “Complied with GB/T 3625-2007; the actual thickness is 1.2 mm”. This ensures the transparency and accuracy of information, preventing misguidance. At the same time, it is necessary to communicate with the customer to confirm whether they accept such a difference. .
If 1.2 is specified in the warranty document, the manufacturer will need to carry out custom manufacturing