How do you calculate internal diameter (ID) if given OD and t?

• ID = OD + 2t

• ID = OD - t

• ID = OD - 2t

• ID = OD/2 -t

Difference between slip on and socket welded flanges:

• slip on flg is normally made with double welded, whereas socket welded flg is single welded only.

• slip on flg is mostly made with single welded joint similar to socket welded

• slip on flg has single welded joint only, whereas socket welded flg has double welded

• slip on flg has 2 welded joint similar to socket welded flg

Winding of spiral wound gasket is normally made from which material?

• CS

• Graphite

• SS 316L

• PTFE

Higher rating of flanges ( e.g. above 300#) indicate that the flanges can be used for:

• standard test pressure

• higher pressure and temperature service

• very cold temperature

• larger piping

According to API 590, what does symbol B mean?

• ID of spade blind

• inside diameter of spectacle blind hole

• OD of spectacle blind

• ID of pipe to be blinded

Acc. to API 590, what is the OD of RF spade for 300lbs NPS 2?

• 140 mm

• 108 mm

• 102 mm

• 127 mm

What is nominal thickness for pipe NPS 4 Sch. 40?

• 6.55 mm

• 6.02 mm

• 8.56 mm

• 7.11 mm

What do you call insulation material component that is in contact with the piping to be protected?

• lagging

• metal jacketing

• banding

• mastic

Functions of insulation: (multiple answer)

• protect piping from rusting or corrosion (CUI)

• prevent hot fluid from cooling as it travels through piping

• prevent cold fluid from getting hot as it travels through piping

• to protect piping from corrosive media inside the piping

Typical types of insulation: (multiple answer)

• rock wool

• fibre glass

• PUF

• calcium silicate