API 579: Evaluating Cracked Welds for Continued Service

What code should be used to evaluate whether a cracked weld is acceptable for continued service?

a) API 510

b) API 579

c) ASME B&PV Code Section VIII - Division 2

d) ASME B&PV Code Section XI

e) None, cracks are never allowed

Answer:

API 579 is the code that should be used to evaluate whether a cracked weld is acceptable for continued service.

Explanation:

The code that should be used to evaluate whether a cracked weld is acceptable for continued service is API 579. This code provides guidelines for assessing the fitness for service of components with cracks, including welds. It helps engineers determine the extent of cracking, evaluate the severity of the cracks, and make decisions regarding repair or further operation.

API 579 uses a variety of factors such as crack length, crack location, stress levels, and material properties to evaluate the integrity of the cracked weld. It provides procedures for calculating the remaining life of the weld and determining if the crack can be tolerated or if repair or replacement is necessary.

API 510, ASME B&PV Code Section VIII - Division 2, and ASME B&PV Code Section XI are all related to the inspection and repair of pressure vessels, but they do not specifically address the evaluation of cracked welds. Therefore, the correct answer is Option b) API 579.