PLIDCO Clamp+Ring User manual

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The Pipe Line Development Company
870 Canterbury Road • Westlake, Ohio 44145
Phone: [phone] • Fax: [phone]
Toll Free: 1-800-848-3333
web: www.plidco.com • e-mail: [email protected]
PLIDCO®CLAMP+RING
INSTALLATION INSTRUCTIONS
!! WARNING!!
IMPROPER SELECTION OR USE OF THIS PRODUCT CAN RESULT IN
EXPLOSION, FIRE, DEATH, PERSONAL INJURY, PROPERTY
DAMAGE AND/OR HARM TO THE ENVIRONMENT.
Do not use or select a PLIDCO Clamp+Ring until all aspects of the application are thoroughly
analyzed. Do not use the PLIDCO Clamp+Ring until you read and understand these installation
instructions.
Every effort has been made to securely package this product prior to shipment. If you have any
questions, or encounter any difficulties using this product, please contact:
PLIDCO “DEPARTMENT 100” at 440-871-5700
toll free U.S. & Canada at 800-848-3333
READ CAREFULLY
The person in charge of the installation must be familiar with these instructions and communicate
them to all personnel involved.
Safety Check List
1. Read and follow these instructions carefully. Follow your company’s safety policy and
applicable codes and standards.
2. Do not exceed the maximum end restraint indicated on the label of the PLIDCO Clamp+Ring.
A PLIDCO Clamp+Ring is designed for a specific longitudinal end restraint in units of force.
Verify the maximum end restraint indicated on the label is sufficient to resist your combination
of hydrostatic, dynamic, external, and thermal induced forces.
3. Do not exceed the maximum temperature indicated on the label of the PLIDCO Clamp+Ring.
The maximum temperature indicated on the label refers only to the maximum operating
temperature of the PLIDCO Clamp+Ring. It does not imply the PLIDCO Clamp+Ring is
capable of resisting longitudinal thermal expansion forces associated with raising the
temperature of the pipeline from ambient to the maximum temperature indicated on the label.
Please refer to “designed end restraint” described earlier. If necessary, please consult
PLIDCO Department 100 for further detail.

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4. Pressurizing of the pipeline should be done with extreme caution. Pressurizing should be
accomplished slowly and steadily without surges that could vibrate the pipeline and fitting.
Industry codes and standards are a good source of information on this subject. Do not exceed
the maximum end restraint indicated on the label as described earlier. Personnel should not
be allowed near the installation until the PLIDCO Clamp+Ring has been proven.
Pipe Preparation
1. Remove all coatings, rust and scale from the pipe surface where the PLIDCO Clamp+Ring will
contact the pipe.
2. Survey the outside of the pipe to confirm a circular cross section, particularly in the area of the
clamping sections. This area should be a smooth curved surface without indentations or flat
spots that could adversely affect proper griping.
3. If applicable, grind pipe welds flush with the outside pipe surface where the PLIDCO
Clamp+Ring will contact the pipe. Failure to do so will concentrate all the clamping force directly
on the crown of the weld and could cause the weld to fail.
4. A ring gauge should be used for submerged pipelines where visibility is limited. PLIDCO has
available ring gauges that can accurately survey the cross sectional shape of the pipe.
Information is available upon request.
5. The bolting force generated when assembling the two halves is capable of reshaping minor out-
of-round pipe. Maximum allowable ovallity is approximately 5%, depending on the pipe wall
thickness. Flat spots are very difficult to reshape and the bolting force should not be relied on to
correct flattened or indented areas.
6. Except for underwater installations, clean and lubricate all PLIDCO Clamp+Ring studbolts and
nuts. Prove free and easy nut running prior to installation. Lubricants are not recommended for
underwater installation due to the potential to collect sand and grit.
Installation
Careless handling can damage the PLIDCO Clamp+Ring. Lifting devices such as chains, cables or
lift truck forks should not contact the clamping sections.
1. If the ring halves were shipped as an assembled unit it would have been shipped with spacers
between two halves. Typically small diameter nuts are used for the spacers. The spacers must
be removed and discarded before installing the PLIDCO Clamp+Ring. Failure to remove the
spacers will prevent the PLIDCO Clamp+Ring from properly gripping the pipe.
2. Assemble the PLIDCO Clamp+Ring loosely on the pipe, centered over the PLIDCO Fitting,
making certain the yellow painted ends are matched. The definition of a PLIDCO Fitting as used
in these instructions is the fitting that the PLIDCO Clamp+Ring is being assembled around.
3. Additional lifting lugs may be welded to the PLIDCO Clamp+Ring to facilitate alignment or
rotation on the pipe.
4. The length of the tie studbolts is such that there should be approximately six (6) inches of
clearance between the inside tie studbolt nuts and the PLIDCO Fitting. This should allow
adequate room for welding of the PLIDCO Fitting if required. If the PLIDCO Fitting is not to be
welded the PLIDCO Clamp+Ring can be positioned closer if desired. See PLIDCO
Clamp+Ring Components.

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5. With the tie studbolt lugs in alignment, insert the tie studbolts. Hand tighten a nut on each side
of the lugs for a total of four nuts for each tie studbolt.The length of studbolt protruding past the
outer nuts should be approximately a half of nut height.
6. All clamping studbolts and nuts should be uniformly torqued as indicated in the Torque Chart
for PLIDCO Clamp+Ring. The best results are obtained by maintaining an equal gap between
the sidebars while tightening the clamping studbolts. The sidebars will be gapped approximately
¼ to ½ inch, depending of the diameter of the PLIDCO Clamp+Ring.
7. The tie studbolt nuts need only be snug. A high pre-stress on the tie studbolts is undesirable
and could be detrimental.
8. To complete assembly, the clamping studbolts should be rechecked at the recommended
torque. An increase in torque on one clamping studbolt can cause a decrease in torque on
neighboring clamping studbolts.
9. If a PLIDCO Clamp+Ring is be reused, it may be removed after the PLIDCO Fitting is completely
welded to the pipe. The root pass by itself does not have sufficient strength.
Field Testing
The PLIDCO Clamp+Ring is capable of being field tested up to 1½ times its maximum end restraint
indicated on the label of the PLIDCO Clamp+Ring. Your combination of hydrostatic, dynamic,
external and thermal induced forces anticipated during testing must be considered. Please refer to
“designed end restraint” described in Safety Check List. If necessary, please consult PLIDCO
Department 100 for further detail.
Storage
PLIDCO Clamp+Rings should be stored in a dry environment to prevent any unpainted surfaces from
rusting.PLIDCO Clamp+Rings put back into storage after being used should be cleaned and the
studs and nuts oiled.
Traceability
PLIDCO Clamp+Rings, as most PLIDCO products, have a unique serial number by which the fitting is
fully traceable.
Clamp+Ring Components

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Torque Chart for PLIDCO Clamp+Ring
Nominal
Wrench
Torque Values
(see Note 1)
Diameter of
Opening
Studbolt
Across Flats
0.08 Cf
0.15 Cf
(inches)
(see Note 2)
(inches) ft-lbs Nm ft-lbs Nm
52,500 psi pre-stress (see Note 3)
5/8--11
1-1/16
70
100
120
160
3/4--10
1-1/4
120
160
210
280
7/8--9
1-7/16
190
260
330
450
1--8
1-5/8
280
390
490
660
1-1/8--8
1-13/16
410
560
720
980
1-1/4--8
2
580
780
1,010
1,370
1-3/8--8
2-3/16
780
1,060
1,370
1,860
1-1/2--8
2-3/8
1,020
1,380
1,800
2,440
1-5/8--8
2-9/16
1,300
1,760
2,300
3,120
1-3/4--8
2-3/4
1,640
2,230
2,930
3,970
1-7/8--8
2-15/16
2,030
2,760
3,630
4,930
2--8
3-1/8
2,480
3,360
4,440
6,030
2-1/4--8
3-1/2
3,560
4,830
6,410
8,690
2-1/2--8
3-7/8
4,910
6,660
8,890
12,000
47,500 psi pre-stress (see Note 3)
2-3/4--8
4-1/4
5,950
8,060
10,800
14,600
3--8
4-5/8
7,820
10,600
14,200
19,300
3-1/4--8
5
9,970
13,500
18,200
24,600
3-1/2--8
5-3/8
12,500
16,900
22,800
30,900
3-3/4--8
5-3/4
15,400
20,900
28,100
38,200
4--8
6-1/8
18,700
25,400
34,300
46,500
37,500 psi pre-stress (see Note 3)
4-1/4--8
6-1/2
17,700
24,100
32,500
44,100
4-1/2--8
6-7/8
21,100
28,600
38,700
52,500
4-3/4--8
7-1/4
24,900
33,700
45,600
61,900
5--8
7-5/8
29,000
39,300
53,300
72,300
5-1/4--8
8
33,600
45,500
61,900
83,900
5-1/2--8
8-3/8
38,600
52,400
71,200
96,600
5-3/4--8
8-3/4
44,200
59,900
81,500
111,000
6--8
9-1/8
50,200
68,100
92,800
126,000
Studs: ASTM A193 Grade B7 - Nuts: ASTM A194 Grade 2H
Note 1: Torque values shown in the table represent two different coefficients of friction (Cf); 0.08 and
0.15. When Cfequals 0.08, it is assumed the studs and nuts are clean, free running, free of
obvious flaws and lubricated with a high-grade graphite-oil thread lubricant. When Cfequals
0.15, it is assumed the studs and nuts are clean, free running, free of obvious flaws and
lubricated with light weight machine oil. The torque values are safe minimums and
represent approximately the bolt pre-stress values.
Note 2: The second number is the pitch, which is shown in number of threads per inch.
Note 3: Use the pre-stress value shown for the applicable studbolt size if bolt tensioners are to be
used and follow the bolt tensioner manufacturer’s instructions.