Final answer:
API Standard 1104, Section 11 is the correct reference for welding issues related to hot tapping and in-service welding in the petroleum industry.
Step-by-step explanation:
The student is inquiring about the American Petroleum Institute's (API) standards relating to welding issues associated with hot tapping and in-service welding. API standards are essential for ensuring safety and reliability in the petroleum industry. Specifically, API Standard 1104, Section 11, addresses these issues and provides guidelines and practices for welding pipelines and related facilities while they are in service, which is important for maintenance and repair works that cannot interrupt the flow of product through the pipe.