Method of choosing accessories for setting pickups

FIELD: measuring volume flow or mass flow of fluid.

SUBSTANCE: method comprises mounting at least two standard set of accessories for setting pressure gauges on a pipeline or tank and determining required set by the algorithm proposed.

EFFECT: expanded functional capabilities.

2 cl, 13 dwg

Most modern chemical process plants use multiple pressure sensors to determine the pressure and flow rate of liquids transported in pipelines. These units also use pressure sensors to determine the pressure and level in process vessels.

Regulations require that the pressure sensors were installed using the materials of construction and configurations that will safely withstand the effects of material in the process line or vessel at a temperature and pressure of this material. Regulations also require that the pressure sensors were installed using the wash and outlet flanges, or other means that provide reliable release and leaching of material before removing the sensor for maintenance or replacement.

When the engineer instrument technician, you must define the hardware kit required for installation of the pressure sensor on the pipe or tank, it will be to design and to determine the necessary piping, stop valves, flanges and other details depending on material properties like pressure, temperature, toxicity, and also the ability of this material to clog or block the aisles. Also be on the agenda is change the physical orientation of the pipe (horizontal or vertical) or capacity.

For modern chemical engineering installation engineer instrument technician will repeat this process for many pressure sensors installed in it. Upon completion of the relevant works engineer instrument technician will be designed and defined a number of sets of parts, which, theoretically, exactly meet the requirements of each application. However, because each application has a unique design, this overall process is relatively expensive.

In the field of design and definition of these sets of parts it will be possible to achieve some progress, if there is a method of standardization, at least to some extent, and thereby reduce its cost and to reduce the number of standardized designs instead of the almost infinite variety of individual designs.

This invention is a method of selecting a kit of parts more standardized way and with less cost. More specifically, this invention is a method of selecting components for prefabricated kit for installing a pressure sensor in such a container, such as tubing or container, and the container has a fluid material, the method comprises the steps: determining at least two different installation categories, it is introduced each of these different installation categories are determined by the properties of a fluid material, determining at least two different components for prefabricated kit, with at least two details from a number of different teams sets are used for different installation categories, and defining the set categories for a fluid material, to provide choice to install at least one detail for precast set.

Figure 1 - detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 1;

2 - item for prefabricated kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 2;

figure 3 - detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 3;

4 is a detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation of categories 2, 4 and 5;

5 is a detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 5A;

6 is a detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 5 is;

Fig.7 is a detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation of category 6A;

Fig - detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 6B;

Fig.9 is a detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 7;

figure 10 - detail for precast kit for pressure sensor on the pipe or vessel for installation category 8;

11 - detail for precast kit for pressure sensor on the pipe or vessel for the installation of categories 2, 3, 4, 5A, 5B, 6A, 6B, 7 or 9;

Fig - detail for precast kit for diaphragm differential pressure sensor in a horizontal pipeline for installation category 10;

Fig - consistent scheme to identify twelve different installation categories.

This invention is a method for selecting components for prefabricated kit for installing a pressure sensor in such a container, such as tubing or container, and the container has a fluid material. This method involves two steps. The first step is to define at least two R the EIT installation categories each of these different installation categories determined by the properties of a fluid material. The second step is to identify at least two different components for prefabricated kit, with at least two different components for prefabricated kit used for a variety of installation types.

On Fig depicts the sequential circuit to determine the twelve different installation categories, namely category 1, 2, 3, 4, 5D, 5B, 6D, 6B, 7, 8, 9 and 10. Table I gives a brief description of each category.

Each category is determined by the material properties in the pipeline or eat the spine, such as temperature, pressure, toxicity, or dangerous, from the point of view of security settings, the tendency to clog the passages in which he is held.

In the diagram Fig shows only one example of a number of possible options. The present invention is of particular importance that the properties of this material necessarily determine at least two of these categories. The material can be any flowable material, such as gas or liquid. For example, the material can be steam or water. Its full range of material can be any material from among the countless chemicals or their mixtures modern chemical process plant, including equipment refineries or pipelines, including gases, liquids and suspensions.

Table II describes more than one hundred and sixty parts for prefabricated kit.

Figure 1-12 shows an example of selection of these items. Detail for precast kit is a drawing or a list of the main parts required for installation which responds to the pressure of the device on the pipeline or vessel according to a standardized design used at least for one installation category. Preferably, a separate item for prefabricated kit was used for only one installation category. For example, item No. 3351-00 from Table II applies only to category 1. However, it should be noted that some details, such as 4300-01 from Table II, can be applied to multiple installation categories.

If more than one item is used to setup categories for con the specific application, the choice of the specific details will depend on a number of factors. For example, in a horizontal pipeline, which set the sensor, it is possible to use a membrane system, Venturi meter wedge. Each of these systems has its advantages and disadvantages, well known from the prior art. Therefore, the engineer instrument technician selects this item for a prefabricated kit that best suits a given application, and is not to design package, theoretically perfectly matches the needs of a given application. Almost every time when installing a pressure sensor for measuring flow, pressure or level in modern chemical engineering installation can be accomplished with the help of the most relevant parts for this installation. The result is a systematic approach by which you can eliminate the need for individual setup for each such application.

The pressure sensors are manufactured by many suppliers, for example, Model 1151 and 3051 pressure sensors and differential pressure sensors company Rosemount Measurement Division of Fisher-Rosemount, Eden Prairie, USA, which reads absolute pressure (BP) or differential pressure (PD) in most pressure ranges used in modern chemical technology equipment, the implement, including refineries and equipment pipelines.

Figure 1 shows the detail for precast kit orifice 20 of the differential pressure sensor 21 in a horizontal pipeline 22 for installation category 1. Aperture 20 is placed between a pair of flanges 23 of the pipeline. In the flanges of the pipe 23 are drilled through the channels 24. Eccentric adapter 25 is welded using nested welding to the channels 24. The rotation of eccentric reducers 25 around the axis shown by the dotted line that provides the 54-millimeter gap between the inputs of the adapter 25, even if the gap between the channels 24 bit different from this gap. The shank 26 is welded using nested welding to the adapter 25. The valve shank 27 is bolted to the shank 26. The bypass manifold 28 is located between the valve 27 and the sensor 21. The bypass manifold 28 includes a control valve internal thread (not shown)which is actuated by a handle 29 to set the initial position sensor 21, as shown in figure 1. The sensor 21 has exhaust ports 30 which are used to reset the pressure sensor 21 into the atmosphere, which are shown with traffic.

It is clear that the use of these eccentric reducers for use with this invention is not prostep is authorized importance. However, reference is made to international application PCT/US 96/20387, because this application is related to such adapters and other equipment described in this application.

Figure 2 shows a detail similar to that shown in figure 1, but for installation category 2. The elements shown in figure 2, which are the same as in figure 1 have the same reference designations. Mounted on the rear side of the nozzle 31 completes the set. Mounted on the rear side of the socket contains two locking valve (not shown)that are driven by an arm 32 and a handle 33. Mounted on the rear side of the nozzle 31 has a hybrid washing agent operation outputs 34, which are shown with traffic. However, if you installed from the back side of the socket, as shown in figure 2, it is assumed that the tube collection release (not shown) connected to hybrid washing agent operation outputs 34, resulting in the actuation of the arms 29, 32 and 33 (and shut-off valves 27) provides erosion and discharge of the pressure sensor 21 prior to its removal for maintenance or replacement.

Figure 3 shows a detail similar to figure 1, but for the installation of category 3. The elements shown in Figure 3, which is similar to Figure 1 have the same reference designations. The bypass manifold 28 is not applied. Instead, it uses a set on the rear side of the Tr is klapannyj pipe 35. Mounted on the rear side min nozzle 35 includes a control valve internal thread (not shown)which is actuated by handle 36, to install the sensor 21 to the initial position. Mounted on the rear side of the bypass pipe 35 has a hybrid washing agent operation channels 37, which is shown with traffic. But when the installation is installed on the rear side of the bypass pipe 35, as shown in Figure 3, it is assumed that the exhaust tube Assembly (not shown) connected to hybrid washing agent operation outputs 37, resulting in the actuation of the arms 38 and 39 (and shut-off valves 27) ensures cleaning of the sensor 21 prior to its removal for maintenance or replacement.

Figure 4 shows the item for a pressure sensor measuring the level 41 on the container 40 for installation category 2, 4 and 5. Process the stop valve 42 is connected to the nozzle 43 of the container 40. Wash the flange 44 is installed between the sensor 41 and valve 42. The flush valve 45 provides washout of solid particles that can clog the valve 42, the flange 44 or the sensor 41.

Figure 5 shows a detail, which in some respects similar parts in figure 1, but is designed for installation category 5A. Elements 5 similar to those shown in Figure 1 and have the same reference designations. Site piping system 46 is installed between the nozzle 28 and the sensor a reference node 47 is one end node of the piping system 46. Tube site piping system 46 is tilted down toward the support end 48 of site piping system 46 to hot evaporation material was condensed and collected near the support end 48 of site piping system 46, to maintain the sensor 21 in more cold than if it acted directly hot evaporation material. Mounted on the rear side min nozzle 35 has the same function and has the same reference designation, as set on the rear side min nozzle figure 3.

Figure 6 shows a detail, similar, in some respects, the details of figure 1, but for installation category 5B. The items shown on Fig.6, the same as in figure 1, and have the same reference designations. It should be noted that the valve 27 is welded to the valve site piping system 49, which contains the exhaust valve 50 and the supporting end 51. Support node 52 is supporting end 51 of the valve site piping system 49. The bypass pipe 53 is installed between the sensor 21 and the bypass pipe 53. The bypass pipe 53 includes a flow regulator (not shown)which is actuated by the arm 54 to cause the sensor 21 to the initial position. Piping valve site piping system 49 is tilted down toward the supporting end 51 CL is panago site piping system 49, so hot evaporation material was condensed and collected close to the supporting end 51 of the valve site piping system 49, so that the sensor 21 could be more cold than if it acted directly hot evaporation material.

Figure 7 shows a detail similar to the parts shown in Figure 5, but for the installation of category 6A. The elements shown in Fig.7, which is similar to figure 5, have the same reference designations. Shown in Fig.7. the set has a node piping system 46a and the abutment end 48A. Site piping system 46a similar site piping system 46 figure 5, except that the pipes site piping system 46a longer pipelines node piping system 46 figure 5. These longer tubes provide better isolation of the sensor 21 from the hot vapors of the material.

On Fig shows a detail, similar parts drawn in figure 6, but for installation category 6B. Depicted on Fig elements that are the same as figure 6 have the same reference designations. Shown in Fig set has a node piping system 49A and the supporting end 51. Site piping system 49A similar site piping system 49 figure 5, except that the piping site piping system 49A longer true the node piping system 49 figure 6. This increased length provides better isolation of the sensor 21 from the hot vapors of the material.

Figure 9 shows a detail similar to the parts shown in Fig.7, but for installation category 7. Depicted in Fig.9 elements that are the same as figure 7 have the same reference designations. Shown in Fig.9 set has a node piping system 46a and the abutment end b. Site piping system 46B similar site piping system 49A 7, except that the supporting end b is elevated relative to the reference end 48A 7. The elevation of the reference end b provides insulation cryogenic liquid material from the sensor 21 for better protection from the cold. Otherwise, the sensor 21 under the influence of the evaporation material, which have a lower heat capacity.

Figure 10 shows the detail for measuring the pressure in the pipes or in the tank for installation category 8, containing the pressure sensor 50. The valve shank 51 is installed between the sensor 50 and the flange 52. The flush valve 53 is installed on the other side of the sensor 50. Shown in Figure 10, the device, including the type of valves and welded joints, facilitates thorough cleaning of the system and reduces the number of cavities and pockets in which may accumulate dirt.

Figure 11 depicts the de is al for measuring the pressure in the tank 54 for installation category 2, 3, 4, 5A, 5B, bA, b, 7 and 9. Detail of the kit shown figure 11, is similar, in some aspects, the details of figure 4. Technological isolation valve 55 is installed on the nozzle 56 of the container 54. The flush valve 57 is located between node remote pressure sensor 58 and the valve 55. On the support site 59 posted by the pressure sensor 60. Capillary tube 61 connects the remote node of the pressure sensor 58 and the sensor 60 and provides isolation of the sensor 60 from a high temperature material. Hybrid washing agent operation the valves 62 perform the same function as hybrid washing agent operation the valves 45 figure 4.

On Fig shows a detail similar to the parts shown in figure 2, but for installation category 10. The items shown on Fig similar elements 2 have the same reference designations. Shut-off valves high pressure 61 is used along with the high-pressure switch 62. Pipe high pressure 63 is installed between the bypass pipe 28 and the sensor 62. The anchor node 64 is one end of the manifold 63.

The method of this invention can be performed using the complete list of details, which are listed in Table II, and with the tools to identify the different installation categories, which are depicted on Fig and summarized in Table I. If it is determined installation category, then you can choose the measurement of flow, pressure or UB is nya. For most applications use at least one complete detail for this installation, which you can choose. But it is preferable to have the above information into a computer program for digital General-purpose computer and to add to this computer program additions.

Additions include the selection of the material of the pipeline on the basis of the underlying manifold. The materials may include carbon steel and various grades of stainless steel, such as 316 stainless steel or steel "HASTELOY si" (HFSTELLOY WITH). In addition, you can also determine the type of weld, valve, bracket, hybrid washing agent operation of the valve, the dimensions of the Venturi or V connection type bolts, and various valves, the material of the collector, additional orientation pulse line, certification, material eccentric reducers, types of tests, the configuration process flange and connection, special cleaning options flanges for details of installing a pressure gauge, diaphragm seal, color covers for the winter season, additional blank flanges, straight welded valves and mounting bracket for details pressure hybrid washing agent operation ring remote seals.

When implementing the present invention using the computer in accordance with viseisei is authorized, that is, when the engineer instrument technician answered all hints of a computer program, then the program can be written to give the sequence number of the kit that will enable the supplier of the kits provide all the parts of this kit, including additions at the discretion of, such as housings for winter conditions and special paint. In addition, the computer program preferably prints a list of characteristics with reference to the price of the kit and the possibility of placing an order for a given set automatically by the modem over the phone line.

EXAMPLE 1

It was necessary to choose the item for a prefabricated kit for flow measurement for horizontal piping containing liquid nitrogen, with a diameter of 50 mm, using the schema on Fig it was determined that it must meet the requirements of category 1. Was selected diaphragm system differential pressure direct mount. Detail for precast kit which could be applicable for this application, was item No. 3411-00, depicted in figure 1.

EXAMPLE 2

It was necessary to choose the item for a prefabricated kit for level measurement in tanks containing 50% aqueous solution of sodium hydroxide. The tank top had a hole for venting. Using the diagram on Fig was determined that she should meet the requirements applying under category 4. Was selected pressure sensor with characteristics rinse and drain. Detail for precast kit which could be applicable for this application, was item No. 4404-02 depicted in Figure 4. The flange 44 was a model hybrid washing agent operation ring AFW company "Rosemount" (Rosemaunt), see above.

EXAMPLE 3

You would need to select the complete part for measuring the pressure in the vessel containing nitrogen at a temperature of 220°C. using the schema on Fig it was determined that she should meet the conditions applying under category 9. Was selected pressure transmitter with remote seal in the form of cakes. Complete detail, which is applicable for this application was part 5576-52 according to 11. The flange 57 has been hybrid washing agent operation ring AFW company "Rosemount″ (Rosemaunt), see above.

1. The method of selecting a set of parts for installing a pressure sensor or differential pressure sensor containing a flowable material container, such as a pipeline or tank, comprising the steps of: a) establishing at least two different installation categories for fluid material, each of which is determined by the properties of the latter; (b) establishing at least two different standardized sets, each of which is a detailed drawing or a list of parts needed for installation will mention what's sensors on the pipeline or vessel, and is responsible mainly one set of installation categories; (c) determining the installation category for fluid material to select the appropriate set of parts for mounting the sensor; (d) selecting one set of parts that meet the installation category specified at the step (C), of the number of standardized sets.

2. The method according to claim 1, which is carried out using a digital computer for General use.

3. The method according to claim 1, which further comprises the step of assigning an order number to the selected set.