Iso 5167 2 free download

No irregularity shall appear inside the connecting hole, on the edges of the hole drilled in the pipe wall or on the pipe wall close to the pressure tapping. No restriction is placed on the minimum diameter, which is determined in practice by the need to prevent accidental blockage and to give satisfactory dynamic performance. The upstream and downstream tappings uK shall have the same diameter. H axial planes, but are normally located in the same axial plane. Both types of tappings may be located either in the pipe or its flanges or in carrier rings as shown in Figure 4.

The minimum diameter is determined in practice by the need to prevent accidental blockage and to give satisfactory dynamic performance.

For any values of E ft. If not, each annular chamber shall connect with the inside of the pipe by at least four openings, the axes of which are at equal angles to one another and the individual opening area of which is at least 12 mm 2. If there are several individual pressure tappings in the same upstream or downstream plane, their centrelines shall form equal angles with each other. The diameters of individual pressure tappings are specified in 5. The pressure tappings shall be circular and cylindrical over a length of at least 2,5 times the internal diameter of the tappings measured from the inner wall of the pipeline.

La The upstream and downstream pressure tappings shall have the same diameter. The thickness f of the slot shall be greater than or equal to twice the width a of the annular slot. The area of the cross-section of the annular chamber, gh, shall be greater than or equal to half the total area of the opening connecting this chamber to the inside of the pipe. The surface finish shall meet the pipe roughness requirements see 5. This also applies to the distance requirement given in 6.

For orifice plates with flange tappings: b. The pipe internal roughness shall satisfy the following specification if the uncertainty values in this part of id- ISO are to be met, i. The discharge coefficient equation see 5. Information regarding pipe roughness may be found in 7. The work on Flu which Tables 1 and 2 are based is described in the references [2] to [4] in the Bibliography.

The roughness requirements relate to the orifice fitting and the upstream pipework. The downstream roughness is not as critical. Where D is less than mm, it is necessary to calculate the maximum and minimum values of Ra using Tables 1 and 2. H specified in 5. In particular, it is not permitted to enter into the equation pairs of values of L1 and L'2 which do not match one of the three standardized tapping arrangements.

Equation 4 , as well as the uncertainties given in 5. These values are not intended for precise interpolation. Extrapolation is not permitted. Test results for the determination of H are only known for air, steam and natural gas. However, there is no known objection to using Equation 5 for other gases and vapours of which the isentropic exponent is known. Values of the expansibility [expansion] factor as a function of the isentropic exponent, the pressure ratio and the diameter ratio are given for convenience in Table A.

Figure 5 shows the pressure profile through an orifice metering system. The general requirements for flow conditions at the primary device are given in 7. The requirements for use of a flow conditioner are given in 7. For some commonly used fittings, as specified in Table 3, the minimum straight lengths of pipe indicated may be used and detailed requirements are given in 6.

However, a flow conditioner as specified in 6. Downstream of a header the use of a flow conditioner is strongly recommended. Many of the lengths given in 6. Additional work which contributed to the lengths in 6.

For research and calibration work in particular, it is recommended that the upstream values b. H specified in Table 3 be increased by at least a factor of 2 to minimize the measurement uncertainty. Flu 6. It is recommended that control of the flowrate be achieved by valves located downstream of the orifice plate.

Isolating valves located upstream of the orifice plate shall be set fully open, and these valves shall be full bore. The valve should be fitted with stops for alignment of the ball in the open position. The valve shown in Table 3 is one which is of the same nominal diameter as the upstream pipe, but whose bore diameter is such that a diameter step is larger than that permitted in 6.

H 0,60 42 13 30 18 42 18 44 18 65 h 25 29 18 30 18 9 5 26 11 14 7 30 15 5 3 7 3,5 0,67 44 20 44 18 44 20 44 20 60 18 36 18 44 18 12 6 28 14 18 9 30 15 5 3 7 3,5 0,75 44 20 44 18 44 22 44 20 75 18 44 18 44 18 13 8 36 18 24 12 30 15 5 3 8 4 NOTE 1 The minimum straight lengths required are the lengths between various fittings located upstream or downstream of the orifice plate and the orifice plate itself.

Straight lengths shall be measured from the uK downstream end of the curved portion of the nearest or only bend or of the tee or the downstream end of the curved or conical portion of the reducer or the expander. NOTE 2 Most of the bends on which the lengths in this table are based had a radius of curvature equal to 1,5D. Such an installation is not, however, recommended.

Since in practice such conditions are difficult to achieve, the following information may be used as a guide for normal installation practice.

If either of the minimum straight lengths is selected from Column B i. The required length between the valve and the 2nd fitting according to 2 should be added to the length between the orifice plate and the 1st fitting specified in Table 3; see Figure 6.

It should be noted that b. The distance between the orifice plate and the fitting shall be measured along the pipe axis. Key 1 expander uK b. In each case, the La second fitting from the orifice plate is two bends in perpendicular planes the separation between the bends is 10 times the diameter of the bends and the orifice plate has diameter ratio 0,4. If the valve has length 1D an additional total length of 9D is required which may be either upstream or downstream of the valve or partly upstream and partly downstream of it.

So no additional length is required because of 6. So an additional total length of 19D is required which may be either upstream or downstream of the expander or partly upstream and partly downstream of it. In either case the test work shall be carried out using orifice plates. Unpatented flow conditioners which have met the compliance test of ISO are the tube bundle flow straightener and the Zanker flow conditioner plate. Annex B describes some patented flow conditioners which have met the compliance test.

Annex B describes some flow conditioners which can be used upstream of orifice plates and the requirements for uK straight lengths associated with them. It is not intended that the inclusion of the flow conditioners described there should limit the use of other flow conditioner designs which have been tested and proved to provide sufficiently small shifts in discharge coefficient.

In order to reduce the swirl that can occur between the exterior tubes of the tube bundle flow straightener La and the wall of the pipe, the maximum outside diameter of the flow straightener, Df, shall satisfy 0,95D u Df u D The length, L, of the tubes shall be between 2D and 3D, preferably as close to 2D as possible. The individual tube wall thickness of the tube bundle flow straightener shall be thin.

All Flu tubes shall have an internal chamfer on both ends. The wall thickness shall be less than 0,D; this value is based on the wall thickness of the tubes used to collect the data on which this part of ISO is based. Individual tubes should be welded together at the points of contact, at least at both ends of the tube bundle.

It is important to ensure that the tubes are parallel to each other and to the pipe axis since, if compliance with this requirement is not met, the straightener itself may introduce swirl into the flow. Centring spacers may be provided on the outside of the assembly to assist the installer in centring the device in the pipe; these may take the form of small lugs or small rods parallel to the pipe axis. After being inserted in the pipe, the tube bundle shall be securely fastened in place.

Secure fastening, however, should not distort the tube bundle assembly with respect to symmetry within the pipe. Program ISO will size orifice plates for given design conditions, find pressure drop for a given flow, or flow for a given pressure drop. The ISO standard is originally designed for gas orifices. In this programs the standard is also used for liquid orifices.

The program can be used to calculate size, flowrate or pressure drop of the following fluids: Gases: 1 Natural gas; 2 Nitrogen; 3 Air.

Full Specifications. What's new in version Date Added June 15, Version Operating Systems. Additional Requirements None. Total Downloads 20, Downloads Last Week 2. Report Software. Related Software. Easy-Pro Builders Estimator Free. Estimate costs of your building projects and activities. Betting Terminal - Bookie Software Free.

ISO lets you print information, save it to file, as well as to set the measurement unit to customary or metric. There are no other noteworthy options available here. We have not come across any issues throughout our evaluation, since the app did not hang, crash or pop up error messages. It has a good response time to commands and works well on later operating systems, although it has not been updated for a while. Excluding its dull interface, ISO serves its purpose and can be easily handled by those looking to make gas or oil orifice calculations.