FABRICATIONS STANDARDS & MATERIAL SPECIFICATIONS
As per house standard, the flanged pipes and fittings are fabricated and the details as follows:
Description | Size DN | Dimension Standard | Grade | Flange |
---|---|---|---|---|
Straigth Length | 25 to 300 | ANSI B 36. 10 Sch. 40 | ASTM A 106 Gr. B. | IS 2062 Gr. B / ASTM A 105 |
90° Elbows 45° Elbows |
25 to 300 | ANSI B 36. 10 Sch. 40 | ASTM A 106 Gr. B. | IS 2062 Gr. B / ASTM A 105 |
ANSI B 16.5 ASA 150# | ASTM A 234 Gr. WPB | |||
Equal Tees Unequal Tees |
20 to 200 | ANSI B 16.5 ASA 150# | ASTM A 395 Di Casting | Integral Flange |
250 t0 300 | ANSI B 36. 10 Sch. 40 | ASTM A 395 Di Casting | ||
ANSI B 16.5 ASA 150# | Is 2062Gr. B / ASTM A 105 | |||
Concentric Reducer | 25 to 200 | ANSI B 16.5 ASA 150# | ASTM A 395 Di Casting | Integral Flange |
Eccentric Reducer | 200 to 300 | ANSI B 36. 10 Sch. 40 | ASTM A 234 Gr. WPB | ASTM A 395 Di Casting |
ANSI B 16.5 ASA 150# | IS 2062 Gr. B / ASTM A 105 | |||
Reducing Flange | 25 to 300 | ANSI B 16.5 ASA 150# | ASTM A 395 Di Casting | Integral Flange ASTM A 395 |
Sight Flow Indicator | 25 to 150 | ANSI B 16.5 ASA 150# | ASTM A 395 | Integral Flange |
DIN 3202 | Di Casting ASTM A 395 | |||
Blind Flange | 25 to 300 | ANSI B 16.5 ASA 150# | IS 2062 Gr. B/ASTM A 105 | IS 2062 Gr. B/ASTM A 105 |
Stainer | 25 to 150 | ANSI B 16.5 ASA 150# | ASTM A 395 Di Casting | Integral Flange |
Di Casting ASTM A 395 | ||||
Bucket Type | Fabricated from ASTM A 234 | IS 2062 Gr. B/ASTM A 105 |
Notes
For PP/HDPE lined products medium duty ERW steel pipes conforming to IS: 1239 ‘B’ class are normally used. Seamless pipes are used on special request.
Flanges are drilled to ANSI B 16.5 ASA 150 class dimensions. Other drilling standards are available on request at extra price. Thickness of flanges is as per house standard.
Tolerance
- Flange drilling dimensions + 1.5mm
- Dimensions of pipes and fittings + 3mm
- Flange thickness + 1mm
Lining Specifications
Following lining materials are available. Their respective maximum working temperature is shown below
- PTFE 250o C,
- FEP 180o C,
- PFA 250o C
- PVDF 150o C,
- HDPE 70o C,
- PP7 100o C
Nominal Lining thicknesses and flare diameters are as follows:
Size DN | 25 | 40 | 50 | 65 | 80 | 100 | 150 | 200 | 250 | 300 |
Thickness | 3.05 | 3.05 | 3.05 | 3.2 | 3.5 | 4.2 | 5.3 | 6.0 | 6.0 | 6.0 |
Flare Dia Min. | 48 | 69 | 88 | 105 | 118 | 151 | 205 | 256 | 312 | 366 |
The minimum thickness of liner is nominal thickness less 10 %
The minimum thickness of the flare is nominal thickness less 20 %