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Products

Technical Standards

TUPY’s pipe fittings are manufactured according to the specifications of Brazilian and international technical standards. To facilitate the identification, they are divided into two groups: BSP and NPT


BSP

Manufactured according to ABNT NBR 6943 standard.

Material: malleable iron

Galvanizing: hot-dip galvanized (hot immersion) in zinc bath, which allows for uniform external and internal protection.

Threads: according to ABNT NBR NM ISO 7-1 standard.

Thread alignment: produced in order to guarantee a maximum deviation of 0.5º, according to the specifications of the standard.

BSP pipe fittings pressure chart
TemperatureMaximum Working Pressures
according to NBR 6943
Test Pressure
 Nominal DiameterNominal Diameter
1/4 to 61/4 to 6
ºC
kgf/cm²
100 kgf/cm³
at 120
25 (360 PSI)
at 300
20 (290 PSI)

NPT Medium Pressure

 

Manufactured according to standards ABNT NBR 6925, ANSI/ASME B 16.3, ANSI/ASME B 16.39 and ANSI/ASME B 16.13.

Material: malleable iron.

Galvanizing: hot-dip galvanized (hot immersion) in zinc bath, which allows for uniform external and internal protection.

Threads: according to ANSI/ASME B 1.20.1 standard.

Thread alignment: manufactured to guarantee a maximum deviation of 0.5o, according to the specifications of the standard.

NPT pipe fittings pressure chart – Medium Pressure
TemperatureMaximum Working Pressures according to ASME/ANSI B 16.3 according to NBR - 6925Maximum Working Pressures for Unions according to ASME/ANSI B 16.39 according to NBR - 6925
 Nominal DiameterNominal Diameter
 1/4 to 61/4 to 6
ºCPSIPSI
-26 at 66
300
300
93
265
265
121
225
225
149
185
185
177
150
150
204
-
110
232
-
75
 

NPT High Pressure

Manufactured according to the standards ABNT NBR 6925, ANSI/ASME B 16.3, ANSI/ASME B 16.39.

Material: malleable cast iron.

Galvanizing: hot-dip galvanized (hot immersion) in zinc bath, which allows for uniform external and internal protection.

Threads: according to standard ANSI/ASME B 1.20.1

Thread alignment: manufactured to guarantee a maximum deviation of 0.5o, according to the specifications of the standard.

Pipe fittings pressure chart (NPT) NBR 6925
TemperatureMaximum Working Pressures according to ASME/ ANSI B 16.3 according to NBR 6925Maximum Working Pressures for Unions according to ASME/ ANSI B 16.39 according to NBR 6925
 Nominal DiameterNominal Diameter
ºC1/4 to 11 1/4 to 22 1/4 to 31/4 to 4
PSIPSIPSIPSI
-26 to 66
2000
1500
1000
600
93
1785
1350
910
550
121
1575
1200
825
505
149
1360
1050
735
460
177
1150
900
650
415
204
935
750
560
370
232
725
600
475
325
260
510
450
450
280
288
300
300
300
230