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Proco Style 232

Proco Style 232 rubber expansion joints are built to withstand even the most rigorous piping system configurations. They are double wide-arch products, specifically constructed to reduce or eliminate common occurrences such as noise and vibration, misalignment/offset, or turbulence. Style 232 expansion joints are appropriate for a wide variety of industrial applications, and are available in open arch and filled arch configurations.

Some of the notable features and benefits of the Proco Style 232 are:

  • Absorption of Directional Movement
  • Less Turbulence or Material Entrapment
  • Absorption of Vibration, Noise and Shock
  • Compensation for Misalignment
  • Wide Range of Service and Lighter Weight
  • Easy Material Identification

For more information about the features and benefits of the Proco Style 232, download our brochure.

For up-to-date pricing and availability information, contact PROCO today.
UL-Certified

Available Styles & Materials

For Specific Elastomer Recommendations, See: PROCO "Chemical To Elastomer Guide"
PROCO Material CodeCover 1,2 ElastomerTube 1,2 ElastomerMaximum Operating Temp. °F (°C)Branding Label ColorF.S.A. Material Class
BB Chlorobutyl Chlorobutyl 250 °F (121°C) Black STD. III
EE EPDM EPDM 250 °F (121°C) Red STD. III
EQ EPDM FDA-EPDM 250 °F (121°C) Red³ STD. II
NH Neoprene CSM 212 °F (100°C) Green STD. II
NN Neoprene Neoprene 225 °F (107°C) Blue STD. II
NF Neoprene FDA-Neoprene 225 °F (107°C) Blue³ STD. II
NP Neoprene Nitrile 212 °F (100°C) Yellow STD. II
NR Neoprene Natural Rubber 180 °F (82°C) White STD. I
NG Neoprene Natural Gum 180 °F (82°C) Tan STD. I

Notes:

All products are reinforced with Polyester Tire Cord
1.  Expansion Joint “Cover” can be coated with CSM UV Resistant Coating.
2.  All NN & NP elastomer designated joints meet the Coast Guard Requirements and conform to ASTM F 1123-87 and are marked accordingly.
3.  Branding Label will be marked as “Food Grade”.
4.  All elastomers above are not intended for steam service.
5.  BB or EE are good for 300°F blower service at 20 PSI or less.

 

Expansion Joint Size Nom. I.D.
Inch / (mm)
Neutral Length
Inch / (mm)
232 Movement Capability:1,2
From Neutral Position (Non-Concurrent)
Operating Conditions 3Weights
lbs / (kgs)4
Axial Compression
Inch / (mm)
Axial Extension
Inch / (mm)
Lateral Deflection
Inch / (mm)
Angular Deflection5
(Degrees)
Torsional Rotation4
(Degrees)
Thrust Factor 7
In2 / (cm2)
Positive PSIG (Bar)Vacuum Inches of Hg / (mm of Hg)8Expansion JointRetaining Ring SetControl Rod Assembly 9
1.5(40)10(254)1.6
(40)
0.8
(20)
0.9
(24)
58.027.44
(48)
200
(14.0)
26
(660)
3.0
(1.4)
2.5
(1.1)
2.3
(1.0)
2(50)10(254)2.8
(70)
1.4
(35)
1.2
(32)
58.0212.40
(80)
200
(14.0)
26
(660)
4.0
(1.8)
4.0
(1.8)
2.8
(1.3)
2.5(65)10(254)2.8
(70)
1.4
(35)
1.2
(32)
47.4215.66
(101)
200
(14.0)
26
(660)
4.5
(2.0)
4.5
(2.0)
2.8
(1.3)
3(80)10(254)2.8
(70)
1.4
(35)
1.2
(32)
42.2219.36
(125)
200
(14.0)
26
(660)
6.0
(2.7)
5.5
(4.3)
2.8
(1.3)
4(100)10(254)2.8
(70)
1.4
(35)
1.2
(32)
34.2227.90
(180)
200
(14.0)
26
(660)
8.5
(3.9)
8.0
(3.6)
2.8
(1.3)
5(125)10(254)3.2
(80)
1.6
(40)
1.4
(36)
28.6238.13
(246)
190
(13.0)
26
(660)
9.5
(4.3)
8.5
(3.9)
4.0
(1.8)
6(150)10
12
(254)
(305)
3.2
(80)
1.6
(40)
1.4
(36)
24.4249.91
(322)
190
(13.0)
26
(660)
11.5
(5.2)
9.5
(4.3)
4.0
(1.8)
8(200)10
12
(254)
(305)
3.2
(80)
1.6
(40)
1.4
(36)
18.8277.97
(503)
190
(13.0)
26
(660)
16.0
(7.3)
14.5
(6.6)
8.0
(3.6)
10(250)14(356)3.2
(80)
1.6
(40)
1.4
(36)
17.82119.97
(774)
190
(13.0)
26
(660)
29.0
(13.2)
17.0
(7.7)
10.0
(4.5)
12(300)14(356)3.2
(80)
1.6
(40)
1.6
(40)
14.92161.98
(1045)
190
(13.0)
26
(660)
36.0
(16.3)
24.5
(11.0)
10.0
(4.5)
14(350)14
16
(356)
(406)
3.2
(80)
1.6
(40)
1.6
(40)
12.92210.18
(1356)
130
(9.0)
26
(660)
44.0
(20.0)
27.0
(12.3)
12.0
(5.4)
16(400)14
16
(356)
(406)
3.2
(80)
1.6
(40)
1.6
(40)
11.32264.74
(1708)
115
(8.0)
26
(660)
53.0
(24.0)
33.5
(15.2)
15.0
(6.8)
18(450)14
16
(356)
(406)
3.2
(80)
1.6
(40)
1.6
(40)
10.12325.50
(2100)
115
(8.0)
26
(660)
61.0
(27.7)
34.0
(15.5)
16.0
(7.2)
20(500)14
16
(356)
(406)
3.2
(80)
1.6
(40)
1.6
(40)
9.12392.62
(2533)
115
(8.0)
26
(660)
73.0
(33.1)
38.0
(17.2)
16.0
(7.2)
24(600)16(406)4.0
(100)
2.0
(50)
1.8
(46)
9.52562.03
(3626)
100
(7.0)
26
(660)
88.0
(40.0)
48.0
(21.8)
20.0
(9.1)
30(750)16(406)4.0
(102)
2.0
(50)
1.8
(46)
7.62842.27
(5434)
90
(6.0)
26
(660)
127.0
(57.6)
63.0
(28.6)
29.5
(13.3)
34(850)16(406)4.0
(102)
2.0
(50)
1.8
(46)
6.721060.51
(6842)
90
(6.0)
26
(660)
134.8
(60.8)
72.0
(32.7)
43.0
(19.5)
36(900)16(406)4.0
(102)
2.0
(50)
1.8
(46)
6.321179.09
(7607)
90
(6.0)
26
(660)
156.0
(70.8)
76.0
(34.5)
45.0
(20.4)
42(1050)16(406)4.8
(120)
2.4
(60)
2.2
(56)
6.521628.28
(10505)
80
(5.5)
26
(660)
211.0
(95.7)
100.0
(45.4)
47.0
(21.3)
48(1200)16(406)4.8
(120)
2.4
(60)
2.2
(56)
5.722085.53
(13455)
80
(5.5)
26
(660)
222.8
(101.0)
132.0
(59.9)
49.0
(22.2)
54(1350)16(406)4.8
(120)
2.4
(60)
2.2
(56)
5.022599.53
(16770)
80
(5.5)
26
(660)
281.5
(127.7)
150.0
(162.7)
67.0
(30.4)
60(1500)18(450)4.8
(120)
2.4
(60)
2.2
(56)
4.523208.97
(20703)
80
(5.5)
26
(660)
358.7
(162.7)
200.0
(90.7)
72.0
(32.7)
66(1650)18(450)4.8
(120)
2.4
(60)
2.2
(56)
4.123839.51
(24771)
80
(5.5)
26
(660)
419.0
(190.1)
240.0
(108.8)
75.0
(34.0)
72(1800)18(450)4.8
(120)
2.4
(60)
2.2
(56)
3.824526.62
(29244)
70
(5.0)
26
(660)
478.8
(217.2)
290.0
(131.5)
94.0
(42.6)
78(1950)18(450)4.5
(112)
2.5
(64)
2.0
(51)
5.225410.60
(34907)
85
(6.0)
26
(660)
754.0
(342.0)
315.0
(142.9)
111.0
(50.3)
84(2100)18(450)4.5
(112)
2.5
(64)
2.0
(51)
4.626221.13
(40136)
85
(6.0)
26
(660)
819.0
(371.5)
350.0
(158.0)
121.0
(54.9)
96(2400)18(450)4.5
(112)
2.5
(64)
2.0
(51)
4.028011.85
(51689)
85
(6.0)
26
(660)
1300.0
(589.7)
367.0
(170.5)
134.0
(60.8)
108(2700)18(450)4.5
(112)
2.5
(64)
2.0
(51)
3.4210029.75
(64702)
85
(6.0)
26
(660)
1462.0
(663.2)
425.0
(192.7)
153.0
(69.4)
120(3000)18(450)4.5
(112)
2.5
(64)
2.0
(51)
3.0212271.84
(79173)
85
(6.0)
26
(660)
1820.0
(825.5)
565.0
(256.2)
167.0
(75.7)

NOTES:

1. Concurrent Movements – Concurrent movements are developed when two or more movements in a pipe system occur at the same time. If multiple movements exceed single arch design there may be a need for additional arches.
To perform calculation for concurrent movement when a pipe system design has more than one movement, please use the following formula:
formula
Calculation must be equal to or less than 1 for expansion joint to operate within concurrent movement capability.
2. Filled Arch Rubber Expansion Joints – Known as Style FA 233. The Series FA230 rubber expansion joints should be selected when there are 20% or more solids being conveyed in the pipe system. The filled arch products are manufactured with seamless tube filled with a lower durometer rubber in the arch core. The filled arch product will have a 50% reduced movement capability from the information provided in Table 3.
3. Pressure rating is based on 170˚ F operating temperature with a 4:1 safety factor. At higher temperatures, the pressure rating is reduced slightly. Hydrostatic testing at 1.5 times rated maximum catalogue pressure or design working pressure of pipe system for 10 minutes is available upon request.
4. Weights are approximate and vary due to length.
5. The degree of angular movement is based on the maximum rated extension.
6. Torsional movement is expressed when the expansion joint is at neutral length.
7. Calculation of Thrust (Thrust Factor). When expansion joints are installed in the pipeline, the static portion of the thrust is calculated as a product of the area of the I.D. of the arch of the expansion joint times the maximum pressure (design, test or surge) that will occur in the line. The result is a force expressed in pounds. Take Design, surge or test pressure X thrust factor to calculate end thrust.
8. Parts listed at 26” Hg / 660 mm Hg vacuum have a design rating of 30” Hg / 762 mm Hg (full vacuum). Vacuum rating is based on neutral installed length, without external load. Products should not be installed “extended” on vacuum applications.
9. Limit rod unit weight consists of one rod with washers, nuts and two limit rod plates. Multiply number of limit rods needed for the application (as specified in the Fluid Sealing Association’s Technical Handbook, Seventh Edition or table 4 in this manual) to determine correct weights.

Table 5Standard Drilling for PROCO Rubber Expansion JointsThickness of Materials for PROCO Rubber Expansion JointsControl Unit Plate Detail
Nominal Pipe
Size Expansion Joint I.D. Inch/(mm)
Flange Dimensions²Material Thickness¹ for Bolt Length Requirements
Flange O.D. Inch/(mm)Bolt Circle Inch/(mm)Number of HolesSize of Holes Inch/(mm)Retaining Rings Thickness Inch/(mm)Rubber Flange Thickness Inch/(mm)Adjacent Mating Flange ThicknessMax. Control Rod Plate Thickness Inch/(mm)Control Rod Plate O.D. Inch/(mm)Maximum Rod Diameter Inch/(mm)
1(25)4.25(107.95)3.13(79.50)40.625(15.9)0.375(9.53)0.472(11.99)Customer to Specify Mating Flange Thickness0.625(15.9)8.375(212.7)0.625(15.9)
1.25(32)4.63(117.60)3.50(88.90)40.625(15.9)0.375(9.53)0.472(11.99)0.625(15.9)8.750(222.3)0.625(15.9)
1.5(40)5.00(127.00)3.88(98.55)40.625(15.9)0.375(9.53)0.472(11.99)0.375(9.5)9.125(231.8)0.625(15.9)
2(50)6.00(152.40)4.75(120.65)40.750(19.1)0.375(9.53)0.472(11.99)0.500(12.7)10.125(257.2)0.625(15.9)
2.5(65)7.00(177.80)5.50(139.70)40.750(19.1)0.375(9.53)0.472(11.99)0.500(12.7)11.125(282.6)1.000(25.4)
3(80)7.50(190.50)6.00(152.40)40.750(19.1)0.375(9.53)0.472(11.99)0.500(12.7)11.625(295.3)1.000(25.4)
3.5(90)8.50(215.90)7.00(177.80)80.750(19.1)0.375(9.53)0.472(11.99)0.625(15.9)12.625(320.7)1.000(25.4)
4(100)9.00(228.60)7.50(190.50)80.750(19.1)0.375(9.53)0.472(11.99)0.625(15.9)13.125(333.4)1.000(25.4)
5(125)10.00(254.00)8.50(215.90)80.875(22.2)0.375(9.53)0.551(14.00)0.625(15.9)14.125(358.8)1.000(25.4)
6(150)11.00(279.40)9.50(241.30)80.875(22.2)0.375(9.53)0.551(14.00)0.500(12.7)15.125(384.2)1.000(25.4)
8(200)13.50(342.90)11.75(298.45)80.875(22.2)0.375(9.53)0.630(16.00)0.750(19.1)19.125(485.8)1.000(25.4)
10(250)16.00(406.40)14.25(361.95)121.000(25.4)0.375(9.53)0.630(16.00)0.750(19.1)21.625(549.3)1.000(25.4)
12(300)19.00(482.60)17.00(431.80)121.000(25.4)0.375(9.53)0.748(19.00)0.750(19.1)24.625(625.5)1.000(25.4)
14(350)21.00(533.40)18.75(476.25)121.125(28.6)0.375(9.53)0.866(22.00)0.750(19.1)26.625(676.3)1.000(25.4)
16(400)23.50(596.90)21.25(539.75)161.125(28.6)0.375(9.53)0.866(22.00)0.750(19.1)30.125(765.2)1.250(31.8)
18(450)25.00(635.00)22.75(577.85)161.250(31.8)0.375(9.53)0.866(22.00)0.750(19.1)31.625(803.3)1.250(31.8)
20(500)27.50(698.50)25.00(635.00)201.250(31.8)0.375(9.53)0.984(24.99)0.750(19.1)34.125(866.8)1.250(31.8)
22(550)29.50(749.30)27.25(692.15)201.375(34.9)0.375(9.53)0.984(24.99)1.000(25.4)36.125(917.6)1.250(31.8)
24(600)32.00(812.80)29.50(749.30)201.375(34.9)0.375(9.53)0.984(24.99)1.000(25.4)38.625(981.1)1.250(31.8)
26(650)34.25(869.95)31.75(806.32)241.375(34.9)0.375(9.53)0.984(24.99)1.000(25.4)40.875(1038.2)1.250(31.8)
28(700)36.50(927.10)34.00(863.60)281.375(34.9)0.375(9.53)0.984(24.99)1.250(38.1)44.125(1120.8)1.500(31.8)
30(750)38.75(984.25)36.00(914.40)281.375(34.9)0.375(9.53)0.984(24.99)1.250(38.1)46.375(1177.9)1.500(31.8)
32(800)41.75(1060.45)38.50(977.90)281.625(41.3)0.375(9.53)0.984(24.99)1.250(38.1)49.375(1254.1)1.500(31.8)
34(850)43.75(1111.25)40.50(1028.70)321.625(41.3)0.375(9.53)0.984(24.99)1.500(38.1)52.375(1330.3)1.750(44.5)
36(900)46.00(1168.40)42.75(1085.85)321.625(41.3)0.375(9.53)0.984(24.99)1.500(38.1)54.625(1387.5)1.750(44.5)
38(950)48.75(1238.25)45.25(1149.35)321.625(41.3)0.375(9.53)0.984(24.99)1.500(38.1)57.375(1457.3)1.750(44.5)
40(1000)50.75(1289.05)47.25(1200.15)361.625(41.3)0.375(9.53)0.984(24.99)1.500(38.1)58.375(1482.7)1.750(44.5)
42(1050)53.00(1346.20)49.50(1257.30)361.625(41.3)0.375(9.53)1.181(30.00)1.500(38.1)61.625(1565.3)1.750(44.5)
44(1100)55.25(1403.35)51.75(1314.45)401.625(41.3)0.375(9.53)1.181(30.00)1.500(38.1)63.875(1622.4)1.750(44.5)
46(1150)57.25(1454.15)53.75(1365.25)401.625(41.3)0.375(9.53)1.181(30.00)1.500(38.1)65.875(1673.2)1.750(44.5)
48(1200)59.50(1511.30)56.00(1422.40)441.625(41.3)0.375(9.53)1.181(30.00)1.500(38.1)68.125(1730.4)1.750(44.5)
50(1250)61.75(1568.45)58.25(1479.55)441.875(47.6)0.375(9.53)1.181(30.00)1.500(38.1)70.375(1787.5)1.750(44.5)
52(1300)64.00(1625.60)60.50(1536.70)441.875(47.6)0.375(9.53)1.181(30.00)1.750(44.5)73.625(1870.7)2.000(50.8)
54(1350)66.25(1682.75)62.75(1593.85)442.000(50.8)0.375(9.53)1.181(30.00)2.000(50.8)75.875(1927.2)2.000(50.8)
56(1400)68.75(1746.25)65.00(1651.00)481.875(47.6)0.375(9.53)1.181(30.00)2.000(50.8)78.375(1990.7)2.000(50.8)
58(1450)71.00(1803.40)67.25(1708.15)481.875(47.6)0.375(9.53)1.181(30.00)2.000(50.8)80.625(2047.9)2.000(50.8)
60(1500)73.00(1854.20)69.25(1758.95)522.000(50.8)0.375(9.53)1.181(30.00)2.000(50.8)82.625(2098.7)2.000(50.8)
66(1650)80.00(2032.00)76.00(1930.40)522.000(50.8)0.375(9.53)1.181(30.00)2.000(50.8)89.625(2276.5)2.000(50.8)
68(1700)82.25(2089.15)78.25(1987.55)562.000(50.8)0.375(9.53)1.181(30.00)2.000(50.8)91.875(2333.6)2.000(50.8)
72(1800)86.50(2197.10)82.50(2095.50)602.000(50.8)0.375(9.53)1.181(30.00)2.000(50.8)96.125(2441.6)2.000(50.8)
78(1950)93.00(2362.20)89.00(2260.60)642.12553.0)0.375(9.53)1.181(30.00)2.000(50.8)103.125(2619.4)2.250(57.2)
84(2100)99.75(2533.65)95.50(2425.70)642.250(57.2)0.375(9.53)1.181(30.00)2.000(50.8)109.875(2790.8)2.250(57.2)
90(2250)106.50(2705.10)102.00(2590.80)682.375(60.3)0.375(9.53)1.181(30.00)2.000(50.8)1117.125(2975.0)2.500(63.5)
96(2400)113.25(2876.55)108.50(2755.90)682.500(63.5)0.375(9.53)1.181(30.00)2.000(50.8)124.625(3165.9)2.750(69.9)
102(2550)120.00(3048.00)114.50(2908.30)722.625(66.7)0.375(9.53)1.181(30.00)2.000(50.8)131.375(3336.5)2.750(69.9)
108(2700)126.75(3219.45)120.75(3067.05)722.625(66.7)0.375(9.53)1.181(30.00)2.000(50.8)138.125(3508.4)2.750(69.9)
120(3000)140.25(3562.35)132.75(3371.85)762.875(73.0)0.375(9.53)1.181(30.00)2.000(50.8)152.125(3864.0)3.000(76.2)

Metric Conversion Formula: Nominal I.D.: in. x 25 = mm; Dimensions/Thickness’: in. x 25.4 = mm.

Notes:
1. Limit/Control Rod length is determined by neutral length of rubber expansion joint, rated extension, control rod plate thickness, mating flange thickness and number of nuts. Consult PROCO for rod lengths.
2. Flange Dimensions shown are in accordance with ANSI B16.1 and ANSI B16.5 Class 125/150, AWWA C-207-07, Tbl 2 and 3 – Class D, Table 4 – Class E. Hole size shown is 1/8” larger than AWWA Standard.
3. Adjacent mating flange thickness is required to determine overall rod length and compression sleeve length (if required).
4. Plate thickness is based on a maximum width PROCO would use to design a Limit/Control Rod plate.
5. Flat Washers required at ring splits and are supplied by others.
6. Control rod plate O.D. installed dimension is based on a maximum O.D. Proco would supply.
7. Control rod diameter is based on a maximum diameter Proco would use to design a control rod.

A control rod unit consists of limit rods, tie rods, or compression sleeves, and a control unit assembly is a system of two or more control rod units placed across an expansion joint from flange to flange. Its purpose is to minimize possible damage caused by excessive motion of a pipeline. Control unit assemblies can be set at the maximum allowable expansion and / or contraction of the rubber expansion joint.

When used properly, control unit assemblies serve as additional safety enhancements, and can minimize possible damage due to adjacent equipment.

Rubber expansion joints should be installed between two fixed anchor points in a piping system. When proper anchoring can’t be provided, control units are required. When an un-anchored piping system is encountered, nuts should be tightened securely against the rod plate, to prevent over-extension due to pressure thrust caused by the expansion joint.

Listed below are three control unit configurations supplied by Proco that are commonly used with rubber expansion joints in piping systems.

  • Figure 1 – Limit Rod: A limit rod control unit configuration will allow an expansion joint to lengthen to a predetermined extension setting. Spherical washers can also be furnished (upon request) to combat any “nut to plate” binding during offset.
  • Figure 2 – Limit / Control Rod: This type of configuration is used to allow specified pipe expansion (expansion joint axial compression) and pipe contraction (expansion joint axial extension) movements. Spherical washers can also be furnished (upon request) to combat any “nut to plate” binding during offset.
  • Figure 3 – Compression Sleeve: A compression sleeve configuration is used to allow for specified pipe expansion (expansion joint axial compression) and pipe contraction (expansion joint extension) movements. Proco will supply each compression sleeve equipped to allow for no axial movement, unless otherwise specified at time of purchase. Spherical washers can also be furnished (upon request) to combat any “nut to plate” binding during offset.

For more information on Proco control unit specifications, download our Series 230 Brochure.

For up-to-date pricing and availability information, contact PROCO today.

Nominal Pipe Size Expansion Joint I.D. Inch / (mm)Number of Control Rods Recommended
 2 4 68
2(51)661
(102)311622• 
6(152)186371• • 
(203)163326• • 
10(254)163325488
12(305)160320481
14(356)112223335
16(406)113227340453
18(457)94187281375
20(508)79158236315
22(559)85171256342
24(610)74147221294
26(660)62124186248
28(711)65130195261
30(762)70141211281
32(813)63125188251
34(864)72143215286
36(914)79138207276
38(965)63125188251
40(1016)4285127169
42(1067)4896144192
44(1118)4488133177
46(1168)4182122163
48(1219)4081141161
50(1270)3775112150
52(1321)3570105140
54(1372)4386128171
56(1422)4080120160
58(1473)3875113150
60(1524)3571106141
62(1575)3366100133
66(1676)305989119
72(1829)255075101
78(1981)285684112
84(2134)24497398
90(2286)265379106
98(2489)295886115
102(2591)255176102
108(2743)23467592
120(3048)18375675

Notes:
1. Pressures listed above do not relate to the actual design pressure of the expansion joint products, but are the maximum surge or pressure for a specific control rod nominal pipe size.

In order to properly and successfully install a Proco Series 230 rubber expansion joint, specific conditions must be met, as well as ensuring the process is implemented by following our guidelines.

For detailed information on service conditions, proper alignment, anchoring, and storage techniques, download the PROCO Series 230 Brochure.