What are the API Q1 DAC design acceptance criteria, and the MAC manufacturing acceptance criteria?
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What are the API Q1 DAC design acceptance criteria? What are the MAC manufacturing acceptance criteria?
My understanding is as follows: What are the acceptance criteria for DAC design? Product standards, customer contract requirements. What are the acceptance criteria for MAC manufacturing? Enterprise standards
Does the DAC include design details? If the machining dimensions of the valve seat are out of tolerance but the pressure test passes, does that not constitute a violation of DAC? My view: Design can be divided into two types – one that is in line with the product’s design, and DAC ； For example, when manufacturing CE products or API products, it is necessary to meet the relevant material standards and product standards ； Additionally, there is the design suitable for manufacturing, namely “process design”, MAC. For example, in the case of WCB: According to MAC’s specifications, the required hardness as specified in the drawings is not less than 137 HB, in order to meet the requirements regarding the hardness range for machining purposes. Requirements for DAC: For example, ASME requires the strength not to exceed 18
The dimensions specified in the design, if they are defined by product standards, fall under the category of DAC; for example, the minimum wall thickness and the minimum diameter of the valve stem as specified in ASME B16.34； If not, it can be regarded as a general standard. The definition of DAC is in line with product design; I understand this to mean in line with the design of the \"product\", not the design of the \"blueprints\".
DAC is used in NCRs, and it may also be used for measurement； Because, if some dimensions are not specified by the DAC (i.e., the product standards), then can measuring devices that do not meet those specifications be exempt from calibration?