Weir SPM Troubleshooting guide

PATENT PENDING
Document P/N: 2A43495
Release Date: 02/27/2018
Revision: IR
Copyright © 2017, S.P.M. Flow Control, Inc.. All rights reserved. S.P.M. Flow Control, Inc. is the owner of the copyright and all confidential information in
this document, which must not be copied in whole or in part, in any form or by any means, and the information in it must not be used for any purpose
other than the specific purpose for which it has been provided without the prior written consent of the copyright owner. SPM, SAFETY IRON, SAFETY
HAMMER, SUR-DROP, DESTINY, STAMPEDE, DURALAST and GLADIATOR are trademarks and/or registered trademarks of S.P.M. Flow Control,
Inc.. WEIR and WEIR (logo) are trademarks and/or registered trademarks of Weir Engineering Services Limited. Certain features of some of the products
disclosed in this document may be protected worldwide by patents pending and registered in the name of S.P.M. Flow Control, Inc..
SPM
®
Well Service Pumps & Flow Control Products
SPM
®
EXL Pressure Relief Disc
Operation Instruction and Service Manual

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Release Date: 02/27/2018
Revision: IR
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WARNING: IMPORTANT SAFETY INFORMATION ENCLOSED. READ THIS OPERATING AND
MAINTENANCE INSTRUCTIONS MANUAL BEFORE OPERATING PRODUCT.
WARNING: THIS INFORMATION MUST BE AVAILABLE TO ALL PERSONNEL THAT WILL OPERATE
AND MAINTAIN EQUIPMENT. FAILURE TO READ, UNDERSTAND AND FOLLOW THE OPERATING
AND MAINTENANCE INSTRUCTIONS MANUAL COULD RESULT IN SERIOUS BODILY INJURY,
DEATH, OR PROPERTY DAMAGE.
Most SPM®products generate, control, or direct pressurized fluids; therefore, it is critical that those who work
with these products be thoroughly trained in their proper application and safe handling. It is also critical that
these products be used and maintained properly.
SPM
®
flow products contain elastomeric seals and are not intended to provide proper functionality when
exposed to fire.
WARNING: MISUSE, SIDE LOADING, IMPROPER MAINTENANCE, OR DISASSEMBLY UNDER
PRESSURE CAN CAUSE SERIOUS BODILY INJURY, DEATH, OR PROPERTY DAMAGE.
The following information is given in good faith and should aid in the safe use of your SPM
®
products. This
information is not meant to replace existing safety policies or practices of your company.
Personal Responsibilities:
1. When working on SPM®flow control products, safety glasses, approved safety shoes, and hard hat
must be worn.
2. Personnel should never hammer on any component when pressure is present. Hammering on any part
or component may also cause foreign material or steel slags to become airborne.
3. It is a personal responsibility to use the proper tools when servicing the valve. It is a personal
responsibility to be knowledgeable and trained in the use and handling of tools for all maintenance of the
valve.
4. Hot surface may be present; it is a person’s own responsibility to protect against burn injuries.
SPM
®
PRODUCT SAFETY GUIDE

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On Location:
Each valve is clearly marked with a maximum pressure rating. This pressure must not be exceeded or
SERIOUS BODILY INJURY, DEATH, OR PROPERTY DAMAGE MAY OCCUR.
1. The valve discharge connections should be properly cleaned and lightly oiled before the downstream
piping is attached. Any worn, damaged, or missing seals should be replaced.
2. Welding, brazing, or heating any part of the product is prohibited. If accessories must be attached,
consult Weir Oil & Gas prior to installation.
3. A complete visual inspection of the product must be made prior to each use. Any leaking seals, broken
bolts, leaking hoses, or improperly tightened parts must be remedied prior to using.
4. Any repairs or service (even routine maintenance) performed on the product must be performed by a
trained service technician who is qualified to work on high pressure flow control products. All such
service and repairs must be supervised by qualified management personnel or returned to Weir Oil &
Gas for service. Only SPM
®
replacement parts should be utilized. Failure to do so may result in loss
of warranty as well as SERIOUS BODILY INJURY, DEATH, OR PROPERTY DAMAGE.
Special Precautions:
1. The modifications to or unauthorized repair of any part of a SPM
®
product, or use of components not
qualified by Weir Oil & Gas, can lead to damage or failure and SERIOUS INJURY OR DEATH.
2. All SPM
®
threaded components are right hand threaded unless specifically designated otherwise. Any
turning counterclockwise will unscrew the assembly. Make sure all threaded components are
assembled to the correct torque value.
3. All products should be properly cleaned, greased, or oiled after each use and inspected prior to each
use.
4. Each integral union connection is clearly marked with a pressure code (i.e. “1502”, 15,000 PSI). This
pressure must not be exceeded. This code should also be used with mating unions. Improper mating
can result in failures. All integral union connections used must match (according to size, pressure
rating, etc.). These connections must also match the service of the designated string they are installed
in.
WARNING: OBSERVE ALL INSTRUCTIONS, CAUTIONS, AND WARNINGS AS NOTED IN THIS
MANUAL. FAILURE TO DO SO CAN LEAD TO EQUIPMENT DAMAGE AND SERIOUS BODILY
INJURY, DEATH, OR PROPERTY DAMAGE.

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SPM
®
PRODUCT SAFETY GUIDE....................................................................................................... 2
TABLE OF CONTENTS........................................................................................................................ 4
SECTION I: GENERAL INFORMATION............................................................................................... 5
T HIS SERVICE MANUAL COVERS :............................................................................................................. 5
H OUSING A SSEMBLIES :......................................................................................................................... 5
D ISC K ITS :........................................................................................................................................... 5
P RODUCT D ESCRIPTION :....................................................................................................................... 6
BOM: (2”-1502 V ERSION ) - 2A42318 ................................................................................................... 9
BOM:
(3”-1502 V ERSION ) - 2A42229 ................................................................................................. 10
SECTION II: INSTALLATION AND OPERATION.............................................................................. 11
D
ISC K IT I NSTALLATION :...................................................................................................................... 11
R UPTURE D ISC C ATCHER I NSTALLATION :.............................................................................................. 12
SECTION III: OPERATIONAL CONSIDERATIONS........................................................................... 13
R UPTURE D ISC F LOW R ATES R EFERENCE :........................................................................................... 14
SECTION IV: MAINTENANCE AND REPAIR .................................................................................... 15
A LWAYS R EMEMBER :.......................................................................................................................... 15
V ESSEL T EST P ROCEDURES :............................................................................................................... 15
SECTION V: SERVICE AND SUPPORT ............................................................................................ 16
S ERVICE C ENTER O RDER I NFORMATION :.............................................................................................. 16
TABLE OF CONTENTS

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This service manual covers:
Housing Assemblies:
Part Number Description
2A42318 2” 1502 Housing Assembly (Does not come with kits)
2A42229 3” 1502 Housing Assembly (Does not come with kits)
Disc Kits:
Order Direct from Weir Oil & Gas
Part Number Description
2A42604 KIT/RUPTURE DISC/2-1502/6,000 PSI
2A42605 KIT/RUPTURE DISC/2-1502/10,500 PSI
2A42606 KIT/RUPTURE DISC/2-1502/12,500 PSI
2A42607 KIT/RUPTURE DISC/2-1502/14,500 PSI
2A42540 KIT/RUPTURE DISC/2-1502/15,000 PSI
2A42772 KIT/RUPTURE DISC/2-1502/15,500 PSI
2A42600 KIT/RUPTURE DISC/3-1502/6,000 PSI
2A42601 KIT/RUPTURE DISC/3-1502/10,500 PSI
2A42602 KIT/RUPTURE DISC/3-1502/12,500 PSI
2A42603 KIT/RUPTURE DISC/3-1502/14,500 PSI
2A42539 KIT/RUPTURE DISC/3-1502/15,000 PSI
2A42781 KIT/RUPTURE DISC/3-1502/15,500 PSI
Contact Weir Oil & Gas for additional ratings.
SECTION I: General Information

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Product Description:
Weir has expanded its comprehensive suite of overpressure relief products to fit a wide range of
operational requirements. Intended to be used in concert with SPM® Nitrogen or Spring Relief valves,
the SPM® EXL Pressure Relief Disc is designed to provide an additional level of protection for
personnel and equipment should an overpressure event occur during pumping operations.
The SPM® EXL Pressure Relief Disc features a replaceable disc, which can easily be changed on
site, allowing for flexibility in pressure ratings as well as lower replacement cost. This device requires
minimal maintenance and provides controlled discharge within a small tolerance band of the desired
rupture rating.
A variety of rupture disc kits are available to install into the assembly; depending on the desired
pressure needed. The design of the product helps facilitate the correct installation orientation of all
components.
Housing assemblies will only come with the main body, hex nut and rupture disc catcher as shown
below. Use page 5 to determine what Rupture Disc Kit will be needed for the desired burst pressure.
Housing Assembly
Arrow
indicates the
direction of
flow.

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Rupture Disc Kit
Rupture disc kits will include the following size specific components:
1. Lock Washer
2. Rupture Disc
3. Seal
4. Pressure Rating Label (to be installed on housing after re-kitting) (Not shown for clarity)
Correct installation
orientation etched on the
disc.

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Key features and benefits
Replaceable pressure relief disc provides operational flexibility and lowers total cost of ownership
In-line housing (MxF) easily installs on fluid ends or within treating iron lines
Installations as shown are representative. Contact Weir for assistance if needed.
 Includes disc catcher for containing any ejections debris. (Note: Catcher may be removed for
applications requiring plumbing to a containment vessel.)
 Replaceable discs available in wide range of set pressures
 Rupture disc machined from a single piece of Hastaloy 276 for superior corrosion resistance and
improved repeatability
 Replaceable disc designed to assist with facilitating correct installation into the housing
 Burst test sampling on each production lot to provide performance assurance

Applications
 Fracking
 Well Service
 Cementing

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BOM: (2”-1502 Version) - 2A42318
2” -1502 EXL Pressure Relief Disc Assembly Bill Of Materials
BOM ID QTY. PART NUMBER DESCRIPTION
1 2 3P10228 Wing Nut
2 3 3P10231 Retainer Segments
3 1 P10232 Retainer Ring
4 1 2P43556 Hex Nut
5 1 Reference
Kit part numbers on
page 5
Nord-Loc Washer
6 1 Rupture Disc
7 1 Rupture Disc O-Ring
8 1 2P43555 Rupture Disc Body
9 1 4P10229 Seal
10 1 2P43730 Disc Catcher

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BOM: (3”-1502 Version) - 2A42229
3” -1502 EXL Pressure Relief Disc Assembly Bill Of Materials
BOM ID QTY. PART NUMBER DESCRIPTION
1 2 2P41604 Wing Nut
2 3 3P10260 Retainer Segments
3 1 P10261 Retainer Ring
4 1 2P43558 Hex Nut
5 1 Reference
Kit part numbers on
page 5
Nord-Loc Washer
6 1 Rupture Disc
7 1 Rupture Disc O-Ring
8 1 2P43557 Rupture Disc Body
9 1 4P10258 Seal
10 1 2P43729 Disc Catcher

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Disc Kit Installation:
SECTION II: Installation and O
p
eration
Liberally coat o-ring with Super
Lube lubricant or equivalent Install o-ring into groove Install rupture disc with correct orientation to ensure proper fit
Install Lock Washer (1) Tighten Hex Nut with SPM
®
Tool
PN: 2P43174 (2”) 2P43175 (3”)
(Torque to 75 ft. lbs.)
Apply Burst Pressure Label:
2P42811 onto housing as shown
Apply anti-seize on the hex nut
threads

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Rupture Disc Catcher Installation:
1. Position rupture disc catcher onto threaded side of the rupture disc assembly.
2. Tighten the wing nut by hand to ensure threads are engaged
3. Use hammer to tighten catcher onto assembly
Rupture Disc Catcher

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Relief tolerance of +/- 5% to rated disc pressure
Suitable for pumping operations at no more than 90% of the marked burst pressure without reduction in service
life.
Operating above that range will introduce fatigue to the disc reducing functional life of the product and it may
result in premature rupture of the disc.
Flow rate capability (@ 42/fps):
WARNING
RUPTURE DISC MAY FRACTURE UPON ACTIVATION. USERS MUST TAKE PRECAUTIONS TO ENSURE
THAT THE EXL PRESSURE RELIEF DEVICE IS ORIENTED SUCH THAT PERSONNEL OR EQUIPMENT
ARE NOT IN LINE OF THE DISCHARGE OUTLET.
WARNING
NEVER BLOCK THE DISCHARGE OUTLET OF THE EXL PRESSURE RELIEF DEVICE.
SECTION III: O
p
erational Considerations

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Rupture Disc Flow Rates Reference:
The following chart and graph represent the pressure and flow rates for the pressure disc per manufacturing
standards. It is important to adhere to these values to ensure the appropriate disc is used. Please note that the
lowest rupture disc is a minimum pressure of 2500 PSI
Pressure
(PSI)
2" Rupture
Discs 3" Rupture Discs
GPM BPM GPM BPM
15,0001,03224.6
2,989 71.2
14,5001,01124.1
2,938 70
14,00099423.7
2,887 68.7
13,50097623.2
2,835 67.5
13,00095822.8
2,782 66.2
12,50093922.4
2,728 65
12,00092021.9
2,673 63.6
11,50090121.4
2,617 62.3
11,00088121.0
2,559 60.9
10,50086120.5
2,500 59.5
10,00084020.0
2,440 58.1
9,50081819.5
2,378 56.6
9,00079719.0
2,314 55.1
8,50077418.4
2,249 53.6
8,00075117.9
2,182 51.9
7,50072717.3
2,112 50.3
7,00070216.7
2,041 48.6
6,50067716.1
1,966 46.8
6,00065015.5
1,889 45
5,50062214.8
1,808 43.1
5,00059314.1
1,724 41
4,50056313.4
1,635 38.9
4,00053112.6
1,541 36.7
3,50049611.8
1,441 34.3
3,00045910.9
1,334 31.8
2,50041910.0
1,217 29
2 & 3” -1502 EXL Pressure Relief Disc Pressure vs Flow Rate
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
0.0 20.0 40.0 60.0 80.0
P
R
E
S
S
U
R
E
(
P
S
I
)
FLOW RATE (BPM)
2INCH
3INCH

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WARNING: DISASSEMBLY UNDER PRESSURE CAN CAUSE SERIOUS BODILY INJURY, DEATH,
OR PROPERTY DAMAGE.
Always Remember:
1. Always wear PPE (personal protective equipment).
2. Only qualified technicians should perform maintenance on SPM
®
products.
3. Always use SPM
®
supplied new parts kit for reassembly.
4. Clean all components thoroughly prior to reassembly.
5. Check sealing surface area for pitting, erosion or other flaws.
6. Use only SPM
®
parts on SPM
®
products.
7. This device is intended to discharge atmospherically when it relieves.
Maintenance Requirements:
Weir recommends that the rupture disc be removed from service after 250 working hours or 100 stages,
whichever comes first.
Vessel Test Procedures:
Prior to shipment, product testing procedure 4S12497 requires that each rupture disc body pass a one-time
vessel test at 150% it’s rated working pressure; then, when conducting subsequent vessel tests on used
housings, limit the pressure to 100% of rated working pressure as required by 4S12497.
Housings should always be vessel tested in accordance with product testing procedure 4S12497. Utilize the
correct dummy seat for the appropriate size (2" - 2P42526, 3" - 2P42280). During the vessel testing the O-
ring and hex nut shall be used.
SECTION IV: Maintenance and Re
p
ai
r
Dummy Seat
2" - 2P42526
3" - 2P42280

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Service Center Order Information:
Weir Oil and Gas stocks a large inventory of genuine original equipment replacement parts. In order to
expedite a parts order and avoid any delays, please provide the following information with your order:
The part number and description (refer to drawings and parts lists in this section) of each item ordered.
The quantity of each part, kit, or assembly ordered.
The model number and serial number.
Your purchase order number.
Specify method of shipment, complete shipping address, complete billing address and telephone
number at the destination of the shipment.
Please refer to our web site for global locations:
Weir Oil & Gas
601 Weir Way
Fort Worth, TX 76108
USA
Tel: [phone]
Fax: [phone]
www.global.weir
SECTION V: Service and Su
pp
ort