Qualification section (API 936)

What factor shall set the refractory shelf life requirements per API 936?

• Temperature exposure

• Moisture exposure

• Time limits for material tests

• Manufacturer’s experience

If manufacturer’s shelf life recommendations (e.g. as noted on the compliance datasheet)

are more stringent, which of the statements below are true?

• Manufacturer’s restriction shall apply

• API 936 four month rule always applies

• API 936 three month rule applies

• None of these are correct

Which statement is true regarding API 936 plastic refractory with a workability index found

to be below the manufacturer’s minimum required value?

• Plastic refractories shall be subject to re-qualification or discarding

• Plastic refractories shall be subject to re-qualification

• Plastic refractories shall be subject to discarding

• None of these are correct

Hydraulic bonded castable refractories shall be packaged in:

• Heat-sealed plastic to assure vapor tight enclosure

• Super sacks with vapor tight enclosures

• Cardboard outside containers

• Sealed, moisture-proof bags

Chemical setting refractories shall be packaged in:

• Heat-sealed plastic to assure vapor tight enclosure

• Super sacks with vapor tight enclosures

• Cardboard outside containers

• Sealed, moisture-proof bags

Quality Control testing shall follow ASTM procedures as modified by API 936 and shall

consist of all of the following except:

• Density and cold crushing strength (CCS)

• Workability index (This is applicable to plastics only)

• Permanent linear change (PLC) and Abrasion loss (when applicable)

• Other tests required by the owner as defined in the execution plan

Refractory shall be applied within what time limit from the initial qualification tests?

• Within 2 months

• Within 3 months

• Within 4 months

• None of these are correct

Refractory materials shall be stored at:

• Room temp

• 40-100°F (5-38°C)

• 50-90°F (10-32°C)

• 60-80°F (15-27°C)

Regarding specimen preparation for tests, Specimens shall be dried and fired as required

by the testing procedure and Oven firing* requires what hold times at what temperature?

• Heat 220°F/hr (104°C/hr) to 700°F max (370°C), 5 hr hold, Cool at 220°F/hr (104°C/hr) max

• Heat 300°F/hr (170°C/hr) to 1500°F max (815°C), 5 hr hold, Cool at 300°F/hr (170°C/hr) max

• Heat 300°F/hr (170°C/hr) to 1500°F max (815°C), 5 hr hold, Cool at 500°F/hr (280°C/hr) max

• Heat 220°F/hr (104°C/hr) to 700°F max (370°C), 5 hr hold, Cool at 300°F/hr (170°C/hr) max

During material qualification, when a sample fails to meet specified requirements, it may:

• Never be accepted

• Retested once

• Retested twice

• None of these are correct