Know in 60 Seconds: How many inspecton openings are required as per ASME Sec VIII Div. 1?

UG-46: Inspection Openings

When is it mandatory to have Inspection Openings?

Inspection Openings are mandatory in the following cases:

⦁ Compressed Air

⦁ Internal Corrosion

⦁ Erosion

⦁ Mechanical Abrasion

Now, we know that we need Inspection Openings. The question now is how many openings and what type of openings do we need?

The requirement for openings can be classified as follows:

Now the question is what should be the size of the manhole or handhole that should be provided?

The size of the manhole or handhole is classified as follows as per code:

Sometimes the size of the manhole is not enough as it would be slightly difficult for a person to go through a manhole of size 400 mm. So, we should look at the practicality of the use of an opening and try to provide a manhole big enough for a person to fit in easily and carry out the work.