Schedule numbers

When using alloy pipe with greater tensile strength than carbon steel, the schedule numbers still apply, but may vary, because it is unnecessary to install thicker walled alloy pipe than is necessary for the strength and corrosion considerations. Schedules 10 and 20 are rather common for stainless steel pipe in low pressure applications. 

Nominal Pipe Size Inches Schedule Number Value of C2 Nominal Pipe Size Inches Schedule Number Value of C2 Nominal Pipe Size Inches Schedule Number Value of Cz... 

It is important to note that the IDs of all pipes of the same nominal size are not equal. This is because the OD remains constant and the wall thickness increases as the schedule number increases. For example, a nominal 1-inch Schedule 40 pipe has a 1.049-inch ID. The same size Schedule 80 pipe has a 0.957-inch ID, while Schedule 160 pipe has 0.815-inch ID. In each case, the OD is 1.315-inch and the wall thickness varies. The actual wall thickness is the difference between the OD and ID divided by 2. 

Pipe schedule number = 1000P/S, approximately, where P is the internal pressure psig and S is the allowable working stress (about 10,000 psi for A120 carbon steel at 500°F). Schedule 40 is most common. 

Pipes are often specified by a schedule number (based on the thin cylinder formula). The schedule number is defined by ... 

The dimensionless pipe wall thickness (times 1000) is known as the Schedule number of the pipe ... 

Using the actual dimensions of commercial steel pipe from Appendix F, plot the pipe wall thickness versus the pipe diameter for both Schedule 40 and Schedule 80 pipe, and fit the plot with a straight line by linear regression analysis. Rearrange your equation for the line in a form consistent with the given equation for the schedule number as a function of wall thickness and diameter ... 

The yield stress for carbon steel is 35,000 psi, and the working stress is one-half of this value. What schedule number would you recommend for a pipe carrying ethylene at a pressure of 2500 psi if the pipeline design calls for a pipe... 

Schedule Number Description of Level of Threat/ Value From Substances Examples of Substances in This Schedule... 

Compound and schedule Number of tumor-bearing mice Size of tumors (cm) ) Number of tumor-bearing mice Size of tumors (cm) ) %ILS... 

Protein products were tested using therapeutic dosing schedules. Number of different molecules for the same type of protein surveyed. 

Standard pipe is made in a discrete number of sizes that are designated by nominal diameters in inches, as inches IPS (iron pipe size). Table A5 lists some of these sizes with dimensions in inches. Depending on the size, up to 14 different wall thicknesses are made with the same outside diameter. They are identified by schedule numbers, of which the most common is Schedule 40. Approximately,... 

The required heat-transfer area of 19.5 m2 is based on an overall heat-transfer coefficient of 102 W/(m2 K). The best exchanger geometry for this application includes six internal baffles, one shell-side pass and two tube-side passes. The shell is fabricated from standard carbon steel piping of nominal pipe size 30, schedule number 80. The 112 tubes required are each 1.83 m long and 38.1 mm (1.5 in.) o.d. (BWG 12). The tubes must be fabricated from stainless steel type 250 for reasons of temperature tolerance. 

Nominal pipe size 30, schedule number 80 —Shell thickness 3 1 mm —Constructed from carbon steel —6 internal cross-flow baffles... 

Sealing strips required 1 every 3 vertical tube rows -In/outlet branch nominal pipe size 4, schedule number 80 heat-transfer coefficient 570 W/(mJK)... 

The shell is constructed from carbon steel and will be fabricated from standard pipe of nominal size 30, schedule number 80. The 112 tubes required are 1.83 m (6ft) lengths and standard BWG 12. The tubes are made from stainless steel type 250 as recommended in the Australian Design Code AS1548 Design of Boilers and Pressure Vessels. 

Safety features for the tank include a pressure relief-valve system on the tank roof, to be opened when draining or adding to the tank contents. A bursting disc system also allows for pressure release in the event of pressure build-up. Amanhole providesaccessto the tank for internal maintenance. The product inlet line is standard nominal pipe size 1.5, schedule number 40S. This inlet is sized for the maximum production flowrates. The product outlet line is of standard nominal pipe size 6, schedule number 120. This line is sized such that a standard-size road tanker may be filled in 15 minutes. 

Inlet line Nominal pipe size 1.5. schedule number 40S Outlet line Nominal pipe size 6, schedule number 120 Manhole, bursting disc, pressure relief valve on roof No insulation... 

Accept the larger value as a conservative estimate. This suggests that a standard pipe of nominal pipe size 1.5, schedule number 80S, is suitable (Ref. P2 Table 6.6). This piping is 48 mm (1.9 in.) o.d. and 38 mm (1.5 in.) i.d. 

The nearest commercial pipe size (Ref. T4 Table 6.6) is a nominal pipe size of 1.5, schedule number 40S (with inside diameter of 41 mm and a wall thickness of 4 mm). 

Table 2 illustrates that the majority of Schedule numbers allow deriving only one or a few different possible chemicals. One Schedule number however, Schedule 2.B.4, describes millions of possibilities ( Chemicals, except for those listed in Schedule 1, containing a phosphorous atom to which is bonded one methyl, ethyl or propyl (normal or iso) group but no further carbon atoms ) and more importantly, the theoretical possibilities for the nerve agents... 

Schedule number (Estimated) number of chemicals Schedule number (Estimated) number of chemicals Schedule number Number of chemicals... 

To facilitate the validation process on the basis of the above approach, the MS electronic data is contributed to the OPCW Laboratory in any of the following electronic formats JCAMP, NIST ASCII, AMDIS, and NIST MS Database. Contributing laboratories provide mostly the NIST MS Database format, with structures. The OPCW Code and the Schedule number are placed in the synonym field of the database. The file is submitted to the OPCW Laboratory either as the NIST MS User Database or the corresponding set of text files representing the MSP (Spectral) and MOL (Structure) information. The NIST MS Search/Analysis programs are used for the management of the MS electronic data and also GC(RI) once merged with the MS data. 

Table 2. An extract from the MS ANALYTICAL DATA spreadsheet PDFIndex showing the OPCW Code, Chemical name, CAS number, Schedule number, Link to PDF files and link to the electronic MS data in the NIST MS Database...

The procedures referred to in this article are not applicable for analysis of ricin. Analysis of some of the scheduled inorganic chemicals may also require special approach. These are (by the Schedule number) the chemicals 2.B.7, 3.B.5, 3.B.6, 3.B.7, 3.B.12, 3.B.13, and 3.B.14. Riot control agents are not included in the Schedules, but are analyzable with the methods presented. 

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