Below is a document that was put together by members of the
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ISO 13709 Clause |
8th
Edition Paragraph |
Subject & Change |
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General |
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Format Document in ISO format. |
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1 |
1 |
Scope Lower limit application guidelines (chemical pump coverage) deleted. Not applicable to sealless pumps. |
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4.1.10 |
Fig 1.2 |
Pump types Classification BB4 now a ring section pump. |
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5.1 |
2.1 |
General |
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5.1.12 |
2.1.10 |
Viscosity correction factors shall be submitted with proposal and test curves. |
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5.1.16 |
2.1.14 |
If specified, the vendor shall provide both maximum sound pressure and sound power level data per octave band for the equipment. |
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5.1.18 |
2.1.16 |
Higher energy level pumps defined for the purpose of reducing vane pass frequency vibration and low frequency vibration at reduced flowrates and above 3600 r/min and absorbing more than 300 kW (400 hp) per stage. |
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5.1.26 |
2.1.24 |
Requirement for fully machined mating faces of pump casing and bearing housing assembly deleted. |
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None |
2.1.27 |
This clause in 8th edition regarding vendor involvement in field support, when specified, deleted. |
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5.1.30 |
2.1.29 |
Equipment shall be designed for outdoor installation (default). |
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5.3 |
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Pressure casings |
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5.3.1 |
2.2.2 |
Maximum discharge pressure = maximum suction pressure + maximum pressure rise with furnished impeller at rated speed and normal SG. |
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5.3.2 |
None |
Option for maximum SG, maximum impeller or number of stages, trip speed. |
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5.3.4 |
2.2.1 |
Design tensile stresses defined in this standard, removing
reliance on the traditional |
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5.3.5 |
2.2.2 |
M a) rating of PN20 (class 125 or 150) flange for type BB1 and VS1-5 pumps, b) 40 bar (600 psig) at 38°C (100°F) or rating of PN50 (class 300) flange for all other types. |
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5.3.7 |
2.2.3 |
Vendor is encouraged to propose alternative corrosion allowance if materials with superior corrosion allowance are used and if they result in lower cost without affecting safety and reliability. |
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5.3.9 |
2.2.6 |
Tutorial added for guidance in application of axially split casings above limitations listed in this clause. |
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None |
2.2.11 |
Specific requirement for casing component alignment dowels or rabbeted fits deleted. |
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5.4 |
2.3 |
Nozzles and pressure casing connections |
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5.4.2.2 |
2.3.2.2 |
Cast iron flanges shall meet the surface finish
requirements of |
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5.4.2.3 |
2.3.2.6 |
Flanges other than cast iron shall meet the flange finish
requirements of |
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5.4.3.5 |
2.3.3.5 |
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5.4.3.7 |
2.3.3.7 and 3.5.1.14 |
Combined two 8th ed. Paragraphs. |
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5.4.3.8 |
2.3.3.8 |
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5.4.3.11 |
None |
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5.6 |
2.5 |
Rotors |
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5.6.1 |
2.5.1 |
Tutorial explains use of enclosed, semi-open and open impellers relative to pump type. |
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5.6.2 |
2.5.1 |
Impellers may be one-piece castings, [machined] forgings, or fabrications, without specific purchaser approval. |
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5.6.6 |
From 2.7.3.8 |
The shaft-to-seal sleeve fit(s) shall be h6/G7 (this
should be changed to F7/h6 – 0.001-0.003 in. loose for 2 inch shaft diameter)
to be consistent with |
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5.6.11 |
None |
“Target rings” may be furnished for shafts that exhibit inconsistent electrical properties in shaft sensing areas. |
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5.6.14 |
None |
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5.6.15 |
5.1.12 |
Rotor of one- and two-stage pumps shall have 1st dry bending critical speed ³ 120% pump’s maximum continuous speed. [Mistakenly applied to only OH2 pumps in 8th Edition.] |
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5.7 |
2.6 |
Wear rings and running clearances |
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5.7.1 |
2.6.1 |
Close axial clearances shall not be used to balance axial thrust. Impellers may have integral wear surfaces or removable wear rings. |
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5.7.3 |
2.6.3 |
Wear rings may now be held in place by locking pins, screws or by
tack-welded.
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5.7.4 |
2.6.4.1 |
Non-metallic wear rings may be proposed – guidelines (materials in
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5.8 |
2.7 |
Mechanical shaft seals |
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5.8.1 |
2.7.2/2.7.3 |
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5.8.3 |
2.7.3.6 |
Seal chamber dimensions are now contained only in ISO
13709; no longer contained in |
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5.9.3 |
2.8.3 |
Vibration |
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None |
2.8.3.3 / 2.8.3.4 |
The need for taking true peak vibration readings has been deleted. The references to instrumentation have also been deleted. |
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Table 7 |
Table 2-5 |
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Tables 7, 8 |
Tables 2-5, 2-6 |
Error corrected; |
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5.9.4 |
2.8.4 |
Balancing |
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5.9.4.1 |
2.8.4.1 |
Major rotating components dynamically balanced to ISO 1940-1 grade 2.5
instead of 4W/n - as standard.
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5.9.4.4 |
None |
IF SPECIFIED, components shall be balanced to grade G1 (equivalent to
4W/n)
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5.10.1 |
2.9.1 |
Bearings |
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5.10.1.5 |
2.9.1.5 |
New note: There are
applications where alternative bearing arrangements may be preferable,
particularly where bearings operate continuously with minimal axial loads.
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5.10.1.6 |
None |
If loads exceed the capability of paired angular-contact bearings as described in 5.10.1.5, alternative rolling-element arrangements may be proposed. |
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5.10.2 |
2.9.2.1 |
Bearing Housings |
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5.10.2.4 b) |
2.9.2.3. b) |
For ring-oil or splash systems, if bearing temperature sensors are
supplied, the outer ring temperatures shall not exceed 93 C (200 F), same as
for pressurized systems.
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5.11 |
2.10 |
Lubrication |
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5.11.4 |
None |
If specified, rolling-element bearings shall be grease-lubricated in
accordance with a) through d) (which covers grease life requirements).
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5.12 |
2.11 |
Materials |
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5.12.1.3 |
2.11.1.9 |
The material specification of all gaskets and O-rings exposed to the pumped fluid shall be identified in the proposal. O-rings shall be selected and their application limited as specified in ISO 21049. |
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5.12.1.10 |
None |
If specified, coatings of a type agreed shall be applied to impellers and other wetted parts to minimize erosion. Special balancing procedures and cautions. |
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5.12.1.12 |
2.11.1.11 |
For sour services, requiring N a)
No longer specifically applies to impellers
and balancing drums but does apply to bowls (Note: in some applications, it
may be desirable to apply the N b) Through-hardened impeller wear rings, HRC > 22, not allowed. c) Double-casing pump inner casing parts that are in compression, such as diffusers, are not considered pressure casing parts. |
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5.12.2 |
2.11.2 |
Castings |
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5.12.2.5 |
2.11.2.5 |
If casting weld repair procedures are specified, only those for repairs in pump manufacturer’s shop are required; repairs at the foundry level are deemed covered by producing specification (the casting material specification. |
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5.12.2.6 |
None |
Pressure-containing castings of carbon steel shall be furnished in the normalized and tempered condition. |
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5.12.3 |
2.11.3 |
Welding |
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5.12.3.1 |
2.11.2.1/ 2.11.3.3 |
Default welding requirements are listed in new Table 10, showing
requirement and applicable code or standard.
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5.12.4 |
2.11.4 |
Low temperature service |
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5.12.4.3 |
2.11.4.2 |
Purchaser to specify whether EN 13445 or |
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5.13 |
2.12 |
Nameplates and rotation arrows |
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None |
2.12.5 |
Deleted: Nameplates
and rotation arrows (if attached) shall be of austenitic stainless steel or
of nickel-copper alloy. |
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6.1 |
3.1 |
Drivers |
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None |
3.1.12 |
Deleted: The equipment feet shall be drilled with pilot holes that are accessible for use in final doweling. |
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6.2 |
3.2 |
Couplings |
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6.2.1 |
3.2.1 |
Couplings and guards between drivers and driven equipment shall be supplied and mounted by the manufacturer of the pump. |
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6.2.2 e) |
3.2.8 |
Couplings operating at speeds in excess of 3800 r/min
shall meet the requirements of ISO 10441 OR |
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6.2.3 |
None |
If specified, coupling balance to ISO 1940-1, grade G6.3. [Now have 3 grades of coupling balance.] |
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6.2.8 |
3.2.4 |
Coupling hubs with cylindrical bores may be supplied with slip fits to the shaft and set screws that bear on the key. |
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6.2.9 |
3.2.4 |
Coupling hubs designed for interference fits to the shaft shall be furnished with tapped puller holes at least 10 mm (0,38 in) diameter to aid in removal. |
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6.2.11 |
None |
If specified, couplings shall be fitted with a proprietary clamping device. |
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6.2.12 |
None |
Provision shall be made for the attachment of shaft alignment equipment without the need to remove the spacer or dismantle the coupling in any way. |
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6.2.14 |
3.2.12 |
a)
b) Sufficiently rigid to withstand a 900 N (200 lbf) static point load in any direction without the guard contacting moving parts c) Fabricated from solid or perforated sheets with openings not exceeding 10 mm (0,375 in) and constructed of steel, brass or non-metallic (polymer) materials. |
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6.3 |
3.3 |
Baseplates |
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6.3.3 |
3.3.3 |
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6.3.4 |
3.3.4 |
Shims shall not be used under the pump. Shim packs shall not be thicker than 13 mm
(0,5 in) nor contain more than 5 shims.
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6.3.8 |
3.3.7 |
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None |
3.3.8 |
“J” hooks on underside of drip pans deleted. |
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6.3.14 |
3.3.14 |
Transverse and axial alignment positioning jackscrews required for drive train components weighing more than 250 kg (500 lb) – was 200 kg (450 lb) for transverse horizontal adjustment and 400 kg (900 lb) for longitudinal adjustments. Screws shall be at least M12 (1/2”-13). |
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6.3.17 |
3.3.17 |
Underside of baseplates sand blasted to ISO 8501 Grade Sa2 or SSPC SP 6 and coated with a primer compatible with epoxy grout. |
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6.3.20 |
None |
Lifting lugs attached to the equipment shall be designed using a maximum allowable stress of one-third of the specified minimum yield strength of the material. |
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6.4 |
3.4 |
Instrumentation |
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6.4.1 |
3.4.1/3.4.2 |
Gauges – Temperature indicators and pressure gauges, if furnished,
shall be in accordance with ISO 10438 (
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6.5 |
3.5 |
Piping |
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6.5.1.1 |
None |
Piping shall be in accordance with ISO 10438 (
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6.5.1.6 |
3.5.1.6 |
If specified, each piping system shall be manifolded to a single purchaser’s inlet or outlet connection near the edge and within the confines of the baseplate. (this was required in the 8th edition) |
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6.5.1.7 |
None |
New clause covers bolting requirements for piping, same as 5.1.31. |
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None |
3.5.2.10.3 |
Block and bleed valves are no longer specified for
pressure gauges when service is flammable or hazardous. [ |
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7 |
4 |
Inspection, testing, and preparation for shipment |
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7.1.4 |
4.1.4 |
a)
Expected dates of testing shall be
communicated at least 30 days in advance and actual dates confirmed as
agreed. Smaller pumps may need to be removed from the
test stand between preliminary and witness tests. b) If specified, witnessed mechanical and performance tests shall require a written notification of a successful preliminary test. The vendor and purchaser shall agree if the machine test set-up is to be maintained or if the machine can be removed from the test stand between the preliminary and witnessed tests. |
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7.2.1.1 |
4.2.1.1 |
List of data the vendor shall keep for at least 20 years has been modified. |
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7.2.1.4 |
None |
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7.2.2 |
4.2.2 |
Materials inspection section
revised and NDE standards tabulated (Table 13) by type of inspection,
methods, and acceptance criteria (defaulting to updated |
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7.3.2.1 f) |
4.3.2.1 |
New: Hydrotesting is permitted without the seal gland plate or seal chamber installed. If a cast material gland plate or seal chamber is used, it shall be separately hydrotested to the same pressure requirements as the pressure casing. |
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7.3.3.2 c) |
4.3.3.1.3 |
Seal leakage rate during any phase of testing is to be in accordance with ISO 21049. Separate statement that liquid seals, suitable for testing on water, shall exhibit no visible signs of leakage. |
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8.1 |
5.1 |
Single stage overhung pumps |
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8.1.1 |
None |
Rear support under bearing housing not allowed. |
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8.1.3 |
5.1.3 |
Integral gear-driven (Type OH6) pumps |
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8.1.3.1 |
None |
Impeller shall be keyed or splined to the gearbox output shaft. |
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8.1.3.6 |
None |
Temperature and pressure gauges mounted directly on the gearbox shall be in accordance with ISO 10438 except that the diameter of the gauges shall be 50 mm (2,0 in). If specified, separable threaded solid-bar thermowells shall be supplied for temperature gauges. |
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8.1.3.7 |
None |
Inducers, impellers and similar major rotating components shall be dynamically balanced to ISO 1940-1 grade G2.5, or to a residual unbalance of 7 g×mm (0,01 oz-in), whichever is greater. Vibration measured during performance test shall not exceed Table 7 levels. |
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8.2 |
5.2 |
Between bearings pumps (types BB1 through BB5) Should be BB1-3 and 5; BB4 does not comply with specification. |
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8.2.2.2 |
None |
Rotors with clearance-fit impellers shall have mechanical means to limit impeller movement in the direction opposite to normal hydraulic thrust to 0,75 mm (0.030 in) or less. |
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8.2.2.3 |
5.2.2.2 |
If specified, rotors with shrink-fit impellers shall have mechanical means to limit movement in the direction opposite to normal hydraulic thrust to 0,75 mm (0,030 in) or less. [Minor change in wording.] |
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8.2.5.1.4 |
None |
If the shaft contains more than 1,0 % chromium and the journal surface speed is above 20 m/s (65 ft/s), the shaft’s journal shall be hard-chromium-plated, hard-coated, or sleeved with carbon steel (to avoid damage from “wire wooling”). |
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8.2.5.2.4 |
5.2.5.2.4 |
Thrust bearing shall be sized for the maximum continuous applied load. Size determined by: a) minimum oil film thickness of 8 mm (0.0003 in), b) maximum unit pressure (load divided by area) of 35 bar (500 psi), and c) maximum calculated babbit surface temperature of 130°C (265°F). Based on design factor of 2 on ultimate capacity. Bearing metal temperature limits on shop test and in the field: - Shop test – 93°C (200°F) - Field alarm or trip – 115°C (240°F) |
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8.2.6.2 |
5.2.6.2 |
External pressure-lubrication systems shall comply with
ISO 104438-3 and |
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8.2.7.1 |
5.2.8.1 |
For pressure-lubricated bearings, test stand oil and oil system components downstream of the filters shall meet the cleanliness requirements of ISO 10438-3. |
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8.2.8.3 |
None |
Option of shipping and storage container for vertical storage. |
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8.2.8.4 |
None |
Option of nitrogen purge of container in clause 8.2.8.3. |
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8.3 |
5.3 |
Vertically suspended pumps (types VS1 through VS7) |
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8.3.1.1 |
None |
Specified discharge pressure shall be at the purchaser discharge connection. Hydraulic performance shall be corrected for column static and friction head losses. Bowl or pump casing performance curves shall be furnished with the correction indicated. |
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8.3.1.2 |
None |
Bearing housings for vertically suspended pumps need not be arranged so that bearings can be replaced without disturbing pump drives or mountings. |
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8.3.3.1 |
5.3.2.1 |
The requirement for fully enclosed impellers (5.6.1) does not apply to vertically suspended pumps. |
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None |
5.3.4.2 |
Deleted: Pump rotors shall be designed such that their first dry critical speed is the following percentage above their maximum allowable continuous speed: for rotors designed for wet running only – 20%; for rotors designed to be able to run dry – 30%. |
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8.3.8.2.2 |
None |
Vertical pumps without integral thrust bearings require rigid adjustable-type couplings. [Restored from 7th Edition, paragraph 3.2.10.] |
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8.3.8.3.1 |
5.3.7.3.1 |
If specified, the mounting plate for double casing pumps shall be separate from main body flange and located sufficiently below it to permit the use of through-bolting on the body flange (see Figure 33). |
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Fig 33 |
None |
Typical mounting for VS6 and VS7 pumps with soleplate. |
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None |
5.3.7.3.3 |
Deleted: The pump-to-motor mounting surface shall contain a rabbeted fit. |
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8.3.10.6 |
5.3.9.8 |
Default is integral bushing spiders and rabbet fits for all column sizes. |
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8.3.11.2 |
5.3.10.3 |
Default is integral bushing spiders and rabbet fits for all column sizes. |
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8.3.12.2, c) |
None |
Rotor of VS5 pumps shall have 1st dry bending critical speed ³ 130% pump’s maximum continuous speed. |
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8.3.13.2 |
None |
Option of hydrotesting bowls and column pipe at 1.5 times maximum differential pressure developed by the bowl assembly. |
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9 |
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Vendor’s data |
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9.1.3 |
6.1.3 |
Co-ordination meeting within 4-6 weeks after order
commitment (was 4 weeks). |
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9.2.3 |
6.2.3 |
NEW: p) a list of any components that can be construed as being of alternative design, hence requiring purchaser’s acceptance (4.2). |
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9.3.1.3 |
6.3.1.2 |
The purchaser and vendor shall agree to the timing and extent of drawing and data review. Deleted: after data review, the vendor shall furnish certified copies in the quantity specified. |
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9.3.2 |
6.3.2 / 6.3.3 |
Drawings and technical data |
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9.3.2.1 |
6.3.2 |
Reference to ISO 31, 128, 129 and 3098 and |
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9.3.2.1 |
None |
Dimensional outline drawings shall indicate the tolerance for pump suction and discharge nozzle face and centerline locations referenced from the centerline of the nearest baseplate anchor bolt hole. The centerline of baseplate anchor bolt hole locations shall indicate the tolerance from a common reference point on the baseplate. |
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None |
Specific speed and suction specific speed. Unit of
flow is m3/s, resulting in values 1/51.64 or 0.019 times that for
customary |
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B |
D |
Cooling water and lubrication system schematics.
Seal piping now per ISO 21049 ( [Fig B.10, Lube-oil system schematic, needs revision.] |
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C |
E |
Hydraulic power recovery turbines. Only change is identification. |
|
D |
M |
Standard baseplates. Dimension F, foundation bolt extension above top of foundation, deleted. |
|
E |
N |
Inspector’s checklist. Revised for ISO13709 clause numbers. Following specific changes made to items listed: Level 1 Motor and electrical components area classification. Casing jackscrews. Baseplate requirements. Restrained rotor. Storage preservation instructions. Level 3 Material identification deleted. |
|
F |
F |
Criteria for piping design. No change in text;
typographical errors from |
|
G |
G |
Materials. |
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Table G.1 |
Table G.1 |
Material class selection guide. Class D-2 added for produced water, formation water and brine. |
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Table H.1 |
Table H.1 |
Material classes for pump parts. Class D-2, super duplex, added. |
|
Table H.2 |
Table H.2 |
Material specifications for pump parts - general update, plus addition of super duplex stainless steel. |
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Table H.3 |
|
Miscellaneous material specifications. |
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Table H.4 |
None |
Non-metallic wear-part materials. [seal materials in ISO
21049 / |
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Table H.5 |
Table 3.4 |
Piping materials. Covers only process, steam and cooling
water. Lubricating oil now in ISO 10438 ( |
|
I |
I |
Lateral analysis |
|
I.1.2 |
I.1.2 |
Report to include rotor’s 1st, 2nd, and 3rd dry critical speeds and details of items considered in the analysis. |
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I.2.4.b) |
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[Measured vibration amplitudes within 135% of calculated values; was ± 35%] |
|
J |
J |
Procedure for determination of residual unbalance. No technical change. |
|
K |
K |
Seal chamber runout illustrations. No technical change. |
|
L |
O |
Vendor drawing and data requirements. No technical change. |
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M |
T |
Test data summary. No technical change. |
|
N |
B |
Pump data sheets. Rearranged in graded form to match pump type: Pages 1, 2: process data and notes. Pages 3, 4: single stage overhung pumps. Pages 3, 4: between bearings pumps. Pages 3, 4: vertically suspended pumps. Page 5: pressure design codes, welding requirements, purchaser defined material inspection. |
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None |
P |
Purchaser’s checklist – deleted. |
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None |
Q |
Standardized electronic data exchange file specification – deleted. |
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None |
R |
Conversion factors – deleted. |
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None |
S |
Calibration and performance verification of true peak and RMS measurement instruments used for test stand acceptance – deleted. |
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Bibliography |
|
Bibliography. Revised to include ISO and EN standards; now 86 references total. |
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