API Std 617: 2002 Axial and Centrifugal Compressors and Expander-compressors for Petroleum, Chemical and Gas Industry Services

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AXIAL AND CENTRIFUGAL COMPRESSORS AND EXPANDER-COMPRESSORS FOR PETROLEUM, CHEMICAL AND GAS INDUSTRY SERVICES 4-27

JOB NO. _____________________ ITEM NO. ____________________

PAGE ________ OF _____ BY _____________________________

DATE __________________ REVISION___________________________

34. A complete list of utility requirements: quantity, ﬁltration and supply pressure of the following:

a. Steam.

b. Water.

c. Electricity.

d. Air.

e. Gas.

f. Lube oil and seal oil (quantity and supply pressure).

g. Heat loads.

h. Power ratings and operating power requirements for auxiliary drivers.

35. A list of machines similar to the proposed machines that have been installed and operating under conditions analogous

to those speciﬁed in the inquiry.

36. Any start-up, shutdown or operating restrictions required to protect the integrity of the equipment, including any unac-

ceptable speeds due to natural frequencies.

37. A list of any components that can be construed as being of alternative design, requiring purchaser’s acceptance.

38. A summary of the materials of construction for the compressor, including hardness for materials exposed to H

39. The maximum seal gas rates (injection or eduction) and rated or expected inner seal-oil leakage rates, if applicable.

When self-acting dry gas seals are supplied, expected seal gas consumption, minimum seal gas supply ﬂow and pri-

mary vent ﬂow should be given at maximum sealing pressure and at conditions over the operating envelope of the

machine.

40. When interstage coolers are furnished, the vendor shall provide the following:

a. Drawing showing cooling system details.

b. Data for purchasers heat and material balances.

c. Details of provisions for separating and withdrawing condensate.

d. Vendor’s recommendations regarding provision for support and piping expansion.

41. Drawings, details and descriptions of the operations of instrumentation and controls as well as the makes, materials and

type of auxiliary equipment. The vendor shall also include a complete description of the alarm and shutdown facilities

to be provided.

42. The minimum length of straight pipe required for proper ﬂow characteristics at the inlet and at any side inlet connection.

43. Maximum and minimum allowable seal pressure for each compressor.

44. A statement of the manufacturers capability regarding testing (including performance testing) of the compressor and

any other speciﬁed items on the train. Details of each optional test speciﬁed shall be included.

45. Predicted performance curves shall be provided for compressor and expander including the following:

a. Expander power versus ﬂow.

b. Compressor power versus ﬂow.

c. Compressor head and ratio, four speed lines from 70% – 110% of normal speed lines.

d. Expander v/c versus efﬁciency.

If a performance test is speciﬁed as tested, then curves and data shall be provided.

46. For compressors that have a back-to-back impeller arrangement, the vendor shall furnish a curve showing the expected

loading on the active or inactive side of the thrust bearing versus any combination of differential pressures across the

low pressure and high pressure sections of the casing.

47. The vendor shall supply balance piston leakage based on design clearances and twice design clearances for the rated

conditions.

API STANDARD 617

CHAPTER 4 ANNEX B

VENDOR DRAWING AND

DATA REQUIREMENTS

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4-28 API STANDARD 617—CHAPTER 4

JOB NO. _____________________ ITEM NO. ____________________

PAGE ________ OF _____ BY _____________________________

DATE __________________ REVISION___________________________

48. When speciﬁed, the vendor shall supply curves of balance piston line differential pressure versus thrust load.

49. The vendor shall provide production and delivery schedules.

50. The vendor shall submit detailed procedures including acceptance criteria for the mechanical running test and all

optional tests, at least 6 weeks prior to the ﬁrst running test.

51. The vendor shall submit progress reports.

52. All information required for the proper installation of the equipment shall be compiled in a manual that must be issued

no later than the time of ﬁnal certiﬁed drawings.

53. A manual containing all required operating and maintenance instructions shall be supplied not later than 2 weeks after

all speciﬁed test shall have been successfully completed.

54. The vendor shall provide a “technical data manual within 30 days of completion” of shop testing including the following:

a. Necessary certiﬁcation of materials.

b. Purchase speciﬁcation for all items on the bill of materials.

c. Test data to verify requirements of speciﬁcations have been met.

d. Heat treat records.

e. Results of quality test and inspections.

f. Mechanical running test data log.

g. Final assembly maintenance and running clearances.

The vendor is also required to keep this data available for examination by the purchaser, upon request, for at least 5

years.

API STANDARD 617

CHAPTER 4 ANNEX B

VENDOR DRAWING AND

DATA REQUIREMENTS

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4-29

ANNEX 4C

EXPANDER-COMPRESSOR NOMENCLATURE

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4-30 API S

TANDARD

617—C

HAPTER

Figure 4.C-1—Typical Expander-compressor Showing Nomenclature of Key Parts

221

981

517

434

602

575

447

562

548

159

155

967

127

159

155

126

147

154

168

530

431

533

136

519

183

505

196

181

401

521

432 601

430

186

179

180

163a

518

163

170

138

429

404

185

197

188

411

535

160

520

423

151

515

516

439

448

545

561

137

471

603

550

102

966

435

433

123

107

119

118

120

486

466

437

224

93a

90a

Item No. Description Item No. Description Item No. Description

61 Expander case 120 Shaft key (expander) 170 Compressor wheel

68 Labyrinth seal housing 123 Expander wheel back seal 179,180 Retaining screw and retaining washer

88 Nozzle cover 126 Shaft 181 Compressor follower

89 Nozzle segment and cam roller 127 Bearing thrust washer (expander) 183 Shim-compressor follower

90 Nozzle adjusting ring 136 Bearing thrust washer (compressor) 185 Compressor wheel back seal

90a Nozzle clamping ring 137 Bearing-drive 186 Shaft key (compressor)

91 Nozzle fixed ring 138 Bearing-load 188 Compressor case

92 Shim-nozzle fixed ring 147 Bearing housing 196 Compressor inlet spacer

93 Piston ring 151 Bearing housing drain 197 Auto thrust balance assembly

93a Seal ring 154 Tachometer pick-up insert 221 Actuator mount assembly

97 Heat barrier wall insert 155,159 Vibration pick-up and lock nut 224 Nozzle actuator rod

98 Shim-heat barrier wall insert 160 Compressor seal 401 Ð 486 Screw

102 Heat barrier wall 163 Compressor seal insert 505 Ð 575 O-ring

107 Expander wheel 163a Shim-compressor seal insert 601 Ð 603 Washer

118,119 Retaining screw and retaining washer 168 Tachometer pick-up 966 Ð 981 Raco seal

Key

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4-31

ANNEX 4D

INSPECTOR’S CHECK LIST

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4-32 API STANDARD 617—CHAPTER 4

Item

Standard 617

Reviewed Observed Witnessed

Inspected

By StatusPar Ch

GENERAL

Contract Review—Testing and

Inspections Listed in Proposal

2.2.1.4 1

General Test Requirements 4.1.1

4.1.3

4.1.4

4.1.4.1

4.1.6

4.1.7

4.2.1

4.2.1.2

Cleanliness 4.2.1.3

4.2.1.4

Hardness 4.2.1.5 1

Case Support Mounting Surfaces 2.3.3 4

Nameplate 2.11.2 4

Rotation Arrows 2.11.1 4

MATERIAL INSPECTIONS

Material Inspections 4.2.2.1 1

Castings 2.2.2.1 1

Low Temperature Impact 2.2.1.15.5 1

Forgings 2.2.3.2 1

Weldings 2.2.4.1 1

Pressure-containing Casings 2.3.1 1

Material Inspection of Pressure-

containing Parts

2.3.1.12 1

ROTATING ELEMENT

Impellers 2.5.10.4

2.5.10.5

2.5.10.6

4.3.3.1

Overspeed 2.5.10.7

4.3.3.1

Balance 2.6.8

2.6.8.8

Annex B

Run-out 2.6.8.9

2.6.8.10

ACCESSORIES

Shaft End Seals 4.3.5

Annex D

Lubrication and Sealing Systems 2.10.3

API Std 614

Drivers 3.1 1

Steam Turbine 3.1.4

API Std 612

Motor 3.1.5

API Std 541

Gas Turbine 3.1.7

API Std 616

Separate Gear Units 3.1.8

API Std 613

Coupling and Guard 3.2

API Std 671

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AXIAL AND CENTRIFUGAL COMPRESSORS AND EXPANDER-COMPRESSORS FOR PETROLEUM, CHEMICAL AND GAS INDUSTRY SERVICES 4-33

Instrumentation 3.4.3

3.4.4

API Std 614

API Std 670

Alarms and Shutdowns 3.4.5

API Std 614

Electrical Systems 3.4.6

API Std 614

2.1.14

Piping 3.5.1

API Std 614

Special Tools 3.6.1

3.6.2

TESTING

Test Data Log 4.3.1.2 4

Wheel Skaker Test to Verify

Natural Frequency

4.3.2 4

HYDROSTATIC TEST

Hydrostatic Test 4.3.2.1

4.3.2.2

4.3.2.3

OVERSPEED TEST

Impeller Overspeed Test 4.3.3.1 1

MECHANICAL RUNNING TEST

Unbalance Response Veriﬁcation 2.6.3.1 1

Vibration Record 2.6.3.1.1

4.3.6.1.1

4.3.6.1.2

4.3.6.1.3

Contract Shaft Seals Used in Test 4.3.6.1.4 1

Oil Flow Rates P. & T. 4.3.3.1.2 4

Oil System Clean 4.3.3.1.3 4

Warning Protective Control

Devices Checked

4.3.3.1.6 4

Magnetic Bearing Check 4.3.3.1.4 4

Connections Check for Leaks 4.3.3.1.5 4

Vibration Levels 4.3.3.1.11 4

Test Speeds Performed 4.3.3.2.1 4

Test Run at Trip Speed 4.3.3.2.3 4

4-hour Test Run 4.3.3.2.2 4

Seal Flow Data 4.3.3.1.2 4

Contract Shaft Seals Used in Test 4.3.3.1.1 4

Test Instrumentation Check 4.3.3.1.7 4

Lube and Seal Oil Flows Varied 4.3.6.1.5 1

Vibration Levels 4.3.3.3.1

4.3.3.3.2

Lateral Critical Speed Veriﬁed 4.3.3.3.3 4

Unbalance Response Analysis

Veriﬁed

4.3.3.3.4 4

Spare Center Section Test 4.3.3.3.6 4

Bearing Inspected After Test 4.3.3.4.1 4

Seals Inspected After Test 4.3.3.4.2 4

Assembled Compressor Gas Leak 4.3.4.1

4.3.4.2

Item

Standard 617

Reviewed Observed Witnessed

Inspected

By StatusPar Ch

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4-34 API STANDARD 617—CHAPTER 4

OPTIONAL TESTING 4.3.5 4

Performance Test 4.3.5.1

4.3.5.1.1

4.3.5.1.2

4.3.5.1.3

4.3.5.1.4

Post-test Inspection 4.3.5.2 4

Helium Test 4.3.8.2 1

Sound-level Test 4.3.8.3 1

Auxiliary Equipment Test 4.3.8.4 1

Post-test Inspection of

Compressor Internal

4.3.8.5 1

Full-pressure/Full-load/

Full-speed Test

4.3.8.6 1

Post-test Inspection of Hydraulic

Coupling Fit

4.3.8.7 1

Spare Parts Test 4.3.8.8

4.3.5.3

PREPARATION FOR SHIPMENT

Equipment Prepared 4.4.1

4.4.2

Paint 4.4.3.1 1

Exterior Machined

Surfaces Coated

4.4.3.2 1

Bearing Housings, Oil Systems,

Auxiliary Equipment and Piping

Preserved

4.4.3.4 1

Openings Covered and Protected 4.4.3.5

4.4.3.6

4.4.3.7

Lifting Points Identiﬁed 4.4.3.8 1

Equipment Identiﬁed, Tagged,

Packing List

4.4.3.9 1

Spare Rotor Prepared for Storage 4.4.3.10 1

Exposed Shafts, etc. Prepared for

Shipment

4.4.3.12 1

Auxiliary Piping Connections

Tagged or Stamped

4.4.4

4.4.5

Installation, Instructions Shipped

with Equipment

4.4.6 1

Item

Standard 617

Reviewed Observed Witnessed

Inspected

By StatusPar Ch

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4-35

ANNEX 4E

FORCES AND MOMENTS

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4-36 API STANDARD 617—CHAPTER 4

E.1 General

E.1.1 The April 1988, November 1979, and October 1973

issues of this standard referred nozzle forces and moments

calculations to appropriate NEMA documents, with the stipu-

lation that the constants in the equations be multiplied by

1.85. Experience has shown that there has not been a uniform

interpretation of “1.85 times NEMA.” Therefore, the equa-

tions have been adapted to expander-compressors by identify-

ing all the constants and clarifying that the equivalent of the

exhaust nozzle in the NEMA calculation is the largest

expander or compressor nozzle. This is usually, but not neces-

sarily, the outlet nozzle.

E.1.2 For expanders designed for driving separate gear-

boxes or generators, which require high tolerance of align-

ment between the expanders and the gearboxes/generators,

the vendor shall identify the maximum allowable forces and

moments.

Note: 0.2 times NEMA is often required for this type of the

arrangement.

E.2 Equations

The design of each expander-compressor body must allow

for limited piping loads on the various casing nozzles. For

maximum system reliability, nozzle loads imposed by piping

should be as low as possible regardless of the expander-com-

pressor load-carrying capability. For single stage expander-

compressors, the forces and moments acting on expander or

compressor due to the inlet and discharge connections should

be limited by the following:

a. The total resultant force and total resultant moment

imposed on the compressor at any connection should not

exceed the values shown in Equations 4.E-1a or 4.E-1b.

In SI units:

+ 1.09 M

≤ 54.1D

(4.E-1a)

In U.S. Customary units:

+ M

≤ 927 D

(4.E-1b)

where

= resultant force, in Newtons (lb.) (see Figure

4.E-1),

= resultant moment, in Newton-meters (ft-lb.)

from Figure 4.E-1.

For sizes up to 200 mm (8 in.) in diameter:

(4.E-2)

= Nominal pipe diameter of the connection, in

mm (in.).

For sizes greater than 200 mm (8 in.), use a value of:

In SI units:

(mm) (4.E-3a)

In U.S. Customary units:

(in.) (4.E-3b)

where

= equivalent pipe diameter of the connection, in

mm (in.),

nom

= nominal pipe diameter, in mm (in.).

b. The combined resultants of the forces and moments of the

inlet, sidestream, and discharge connections resolved at the

centerlines of the largest connection should not exceed the

following:

1. The resultants shall not exceed:

In SI units:

+ 1.64M

≤ 40.4 D

(4.E-4a)

Figure 4.E-1—Combined Resultants of the Forces and

Moments of Corrections

VERTICAL

PARALLEL TO

COMPRESSOR SHAFT

++=()

400 D

nom

--------------------------=

16 D

nom

-----------------------=

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