ASTM A234 WP22 Pipe Fittings
ASTM A234 WP22 Pipe Fittings Supplied to an Australian Client
ASTM A234 WP22 Class 1 eccentric reducers, 2-1/2″x2″ XS.
ASTM A234 WP22 Class 1 caps, 2-1/2″ SCH80, acc. to ASME B16.9.
All fittings are made from Cr-Mo low alloy steel grade WP22 Class1(raw material mill – BaoSteel) with butt welding ends. Photos were taken before heat treatment and sandblasting & painting. These fittings are supplied to a power plant in Australia.
Chemical Composition
| The Chemical Composition of WP22 pipe fittings, % | ||
|---|---|---|
| Element | Eccentric Reducer | Cap |
| C | 0.12 | 0.10 |
| Si | 0.26 | 0.28 |
| Mn | 0.43 | 0.45 |
| S | 0.008 | 0.006 |
| P | 0.012 | 0.010 |
| Cr | 2.15 | 2.18 |
| Ni | 0.06 | 0.05 |
| Cu | 0.05 | 0.05 |
| Mo | 0.94 | 0.95 |
| V | 0.02 | 0.02 |
| AL | 0.006 | 0.008 |
Mechanical Properties
| Mechanical | Eccentric Reducer | Cap |
|---|---|---|
| Yield Strength(Mpa) | 345 | 350 |
| Tensile Strength(Mpa) | 525 | 520 |
| Elongation(%) | 32 | 33 |
| Hardness(HB) | 157 | 150 |
Heat Treatment & Inspection
Both the ASTM A234 WP22 reducers and caps were heat treated by the method of normalizing and tempering. The normalizing temperature was at 940°C while the tempering temperature was at 740°C. After heat treatment, ultrasonic tests were implemented to ensure the fittings are free of defection.
CATEGORY AND TAGS: