You can use the following links to obtain the API Interpretations:

For API-650: http://committees.api.org/standards/tech/docs/650ti.xls

For API-653: http://committees.api.org/standards/tech/docs/653ti.xls

For API-2000: http://committees.api.org/standards/tech/docs/2000ti.xls

Note, these links all lead to a downloadable Excell file.