Buying Guide

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AHEAD OF THE FLOW
®
NIBCO
®
Press System — Engineering Data
Copper and Copper Alloy Fittings
Standards
O-ring seal joints are not new to the piping industry, but joining techniques
like the NIBCO Press System are providing new alternatives for copper piping
assembly. NIBCO has relied on its century of experience in copper and brass
piping products to design the best performing and most dependable line of
fittings possible.
Applications
The NIBCO Press System fittings are designed to join with ASTM B 88 seam-
less copper water tube in hard drawn/half-hard condition, Type K, L, and M;
as well as, with annealed tubing in 1/2", 3/4" and 1" sizes for residential and
commercial potable, hot, chilled and process water applications for plumbing
and HVAC systems. Copper and copper alloy materials and EPDM elastomeric
seals have a long history of compatibility with common chemicals used in these
systems. A chemical resistance chart should always be referenced when other
fluids are to be introduced.
NOTE: FLUIDS CONTAINING HYDROCARBON-BASED OILS ARE NOT
COMPATIBLE WITH THE EPDM SEAL.
Pressure/Temperature Limitations
-20°F to 250°F up to 200 psiG, non-shock working pressure except where
otherwise noted.
Materials:
• Wrot Copper
◆ ASTM B 75 Alloy C12200
• Cast Copper Alloy
◆ ASTM B584-12a Alloy C87600 and C84400
• Elastomeric Seals
◆ EPDM O-rings compliant with IAPMO PS-117 and ASME B16.51
Performance
The following performance tests were conducted per ASME B16.51. The fitting
dimensions, materials of construction and performance tests were witnessed
and verified by internationally recognized NSF. A letter of verification is avail-
able upon request:
1. Dimensional Verification
a. Inside diameter of press cup and waterway
b. Outside diameter of press cup and waterway
c. Wall thickness
d. Threaded ends conformance to ASME B1.20.1
2. Hydrostatic Minimum Burst Strength Pressure
a. Fitting samples hydrostatically tested to a minimum of 600 psi
(three times the rated internal working pressure) at 73°F.
3. Unrestrained Hydrostatic Pressure Test at 68°F (20°C) and 200°F (93°C)
a. Fitting assemblies were filled with water and pressurized to 600
psiG at 68° and 200°F for 48 hours.
4. Static Torque
a. Fittings were filled with water, had a minimum torque applied and
released. Each fitting was then pressurized to 400 psiG for
48 hours.
5. Bending Test
a. A sample fitting was installed between two equal lengths of hard-
drawn copper tubing supported six (6) feet apart. A concentrated
load was applied to the center of the fitting. The 1/2" thru 2"
assemblies were subjected to 600 psiG water pressure and 2-1/2"
thru 4" were subjected to 400 psi water pressure for one (1)
hour at 68°F (20°C) .
6. Vacuum Pressure Test
a. Fittings were subjected to a vacuum pressure of 24.5 inches of
mercury for one (1) hour at 68°F (20°C).
7. Cyclic Pressure Test
a. Fittings were subjected to a hydraulic shock pressure of 400 psiG
for 10,000 cycles.
8. Vibration Test
a. Fitting assemblies were subjected to a hydrostatic cyclic vibration
test at 400 psiG and 2-1/2" thru 4" were subjected to 400 psi water
pressure for 1,000,000 cycles. After cycling, the 1/2" thru 2" assem-
blies were pressurized to 600 psiG for 30 minutes and 2-1/2" thru 4"
were pressurized to 400 psi for 48 hours.
9. Thermocycling Test
a. Test assemblies were constructed using type L copper tube and
press connect fittings. The test assemblies were subjected to
flowing water at 145 psi cycled between 68°F (20°C) and 200°F
(93°C) for a period of 15 minutes at each temperature for nominal
size 2" and smaller. Nominal size 2 1/2" and larger were pressurized
with air and immersed in water at 68°F (20°C) and 200°F (93°C).
Cycling continued for 5,000 cycles for sizes 2" and smaller and 2,500
cycles for 2 1/2" and larger size fittings.
10. Dynamic Torque at 68°F (20°C) and 200°F (93°C)
a. Fittings were assembled between two lengths of hard-drawn
copper tubing. With one tube fixed, the other tube twisted ±5° for
10,000 cycles at 68°F (20°C) or 200°F (93°C). Each assembly was
then subjected to 400 psiG water pressure at 68°F (20°C) or 200°F
(93°C) for 1 hour.
Tests were performed with K and M hard drawn tubing. The thermocycle test
used L hard drawn tube.
Flow area consistent
with ASME B16.22
NIBCO
®
press fittings
meet all performance
requirements of
ASME B16.51
NOTE: Freezing weather precaution — subsequent to testing a piping system, valve
should be in an open position to allow complete drainage.
Revised 9/17/2019