• Strange number of RT exposures - pipe ASME V - ASME ...

    The thickness versus diameter affects the change in density on the radiograph from center to end. If there is a heavy wall, small diameter weld they were probably unable to hold the 2.0 - 4.0 density requirement across the whole length of zone requiring more, shorter zones.

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  • Calculating the required water supply line size

    Sep 22, 2014 · Classification of the building Residential and Commercial buildings have different sizing requirements. Some water supply line size facts simplified. Increasing the water supply line size to just one pipe size larger makes a dramatic difference.

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  • Drain Pipes and Vent Stack - Engineering ToolBox

    Drain pipes and vent stack sizing. Related Topics . Water Systems - Hot and cold water service systems - design properties, capacities, sizing and more; Dimensions - Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight and more ; Related Documents . ASTM B306 - Copper Tubes for Drain, Waste and Vent - Dimensions and Working Pressures - Dimensions of ...

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  • National Standard Taper Pipe Threads Size NPT Chart ...

    The taper rate for all NPT threads is 1⁄16 (3⁄4 inch per foot) measured by the change of diameter (of the pipe thread) over distance. The angle between the taper and the center axis of the pipe is 1° 47'′ 24"″ (1.7899°). Commonly-used sizes are 1/⁄8, 1/⁄4, 3/⁄8, 1⁄/2, 3⁄/4, 1, 1 1⁄/4, 1 1⁄/2, and 2 inch, appearing on pipes and fittings by most U.S.

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  • Pipe Class and piping specifications – Must Know of Pipe ...

    Piping class or Pipe Class is a document that specifies the type of the components such as a type of pipe, schedule, material, flange ratings, branch types, valve types and valve trim material, gasket and all the other components specific requirements to be used for different fluids under different operating conditions in a plant.

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  • Minimum Cover Heights for Corrugated Plastic Pipe …

    Minimum Cover Heights for Corrugated Plastic Pipe Under Vehicle Loading MICHAEL G. KATONA ·me minimum soil cover requirement arc provided for corru­ gated plastic pip_t (high den. ity polye thylene) to safely wi.thstand vehicular loading when the pipe i in ·tailed und r r adway uch as in culvert applications. Pipe diameter ranging from 12 ...

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  • Outlet Pipe Size for Pump- is a Bigger Pipe Better?

    As a general rule (ie not always true, but is most of the time) the pipe size of the pump outlet is almost always smaller than the size of pipe that will provide optimal flow from the pump. In other words, if a pump has a 1″ threaded outlet, it is very likely that a 1 1/2″ pipe would be attached to the 1″ outlet for use as the outlet pipe.

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  • Tech Topic Manhole Sizing Recommendations

    Nov 17, 2010 · The manhole sizing recommendations in this article provide a quick and easy resource for estimating the optimal size for manholes, depending on the size and number of incoming pipe and type of connections being used. Ultimately the manhole design is the responsibility of the engineer, who must ensure the angles of deflection are correct.

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  • UP Pipeline Engineering Specs

    For Non-flammable Substances. Wall thickness of the casing must be no less than that specified in the attached steel casing pipe wall thickness chart. The inside diameter of the casing shall be no less than 2 inches greater than largest outside diameter of carrier pipe, joints or couplings.

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  • Sizing Water Supply Lines - Engineering ToolBox

    Sizing Water Supply Lines ... Due to intermittent use of the fixtures in a water supply system it can be difficult to predict and size the supply and service lines. The fixtures total theoretical demand should always be compensated with a statistic more expected demand. ... PE Water Supply Pipes - Properties - Nominal pipe size, outside ...

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  • Flow Rate Vs. Pipe Size Sciencing

    Mar 13, 2018 · Keep in mind that the stated size of a pipe is a measure of its diameter, and you need the radius to apply Poiseuille's law. The radius is half the diameter. Suppose you have a length of 2-inch water pipe, and you want to know how much the flow rate will increase if you replace it with 6-inch pipe.

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  • PWHT at valve - Valve engineering - Eng-Tips

    Feb 28, 2002 · Typically, these small diameter systems have piping wall thicknesses that are less than the minimum that requires PWHT. (this is the way I have always undrestood the requirements of ASME B31.1) Is there some strange piping material or some super high pressure that this system will see ?

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  • Minimum Pipe Wall Thickness for Welding - CR4 Discussion ...

    Dec 12, 2009 · dear questioner, size of pipe is 40''/36'',wall thickness is much more,we have to calculate the strength of welded zone, so pipe can sustain the load during the pipe handling,how we make the groove and depth of welding which can sustain the load.

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  • What Size Trap Should Be Used for a Shower Drain? eHow

    What Size Trap Should Be Used for a Shower Drain?. Plumbing standards, such as the minimum size for the trap on a shower drain, are designed to foster sanitary plumbing systems, free from disease. The specific regulation you should follow depends on the local plumbing codes where the shower drain is installed. These local codes are usually based on...

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  • Calculating Horsepower Requirements and Sizing …

    Velocity (V) in feet per second (ft/s) can be calculat- ed based on the flow rate in gallons per minute (gpm) and pipe internal diameter in inches as (equation 4) V (ft/s) = Flow (gpm) 2.45 ID2 (inches) Friction Loss. Pumping plants must provide sufficient energy to overcome friction losses in pipelines.

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  • ASME Sec. IX Diameter limits - ASME (mechanical) Code ...

    Question (1) Is a welder required to take a "small diameter" pipe test to weld a "saddle in" [full penetration through shell as in Fig. UW-16.1, sketch (c) of Section VIII Division 1] when the diameter of the hole in the head or shell is less than 2-7/8 in. O.D.? Reply (1) No, when the weld preparation is made in the head or the shell.

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  • Outlet Pipe Size for Pump- is a Bigger Pipe Better?

    As a general rule (ie not always true, but is most of the time) the pipe size of the pump outlet is almost always smaller than the size of pipe that will provide optimal flow from the pump. In other words, if a pump has a 1″ threaded outlet, it is very likely that a 1 1/2″ pipe would be attached to the 1″ outlet for use as the outlet pipe.

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  • PIPE / PIPE THREAD DIMENSIONS Nominal Pipe sizes …

    PIPE / PIPE THREAD DIMENSIONS Nominal Pipe sizes do not match any of its actual physical dimensions. The OD of pipe / fitting must be measured & compared to the table for identification. For example; a 3/4" NPT pipe thread has an outside diameter of 1.050 inches and 14 threads per inch.

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  • TN 27 Frequently Asked Questions - HDPE Pipe for …

    PPI TN-27 Frequently Asked Questions HDPE Pipe for Water Distribution and Transmission Applications Foreword This report was developed and published with the technical help and financial support of the members of the PPI (Plastics Pipe Institute, Inc.). The members have shown their interest in

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  • TR-46 Guidelines for Use of Mini-Horizontal Directional ...

    The primary focus of this document is on pipe constructed of gh density polyethylene (HDPE) hi with a material designation code of either PE3608 or PE4710. For convenience, the term “HDPE” is used as a generic term to refer to either material, PE3608 or PE4710, with the distinction, if …

    Authors Lawrence M SlavinAbout Polyethylene · Directional drilling · Drilling · Information management · Pipeline transport

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  • SANITARY SEWER SPECIFICATIONS - hmwater

    Sewers shall be designed and constructed to give a minimum design velocity of 2 feet/second and a maximum velocity of 10 feet/second. 3. The minimum line size is 8 inches in diameter. 4. Sewers 8 inches in diameter shall be constructed of either Ductile Iron sewer pipe or PVC sewer pipe.

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  • MANHOLE SIZING RECOMMENDATIONS - Precast …

    pipe is based on the reference pipe, which is arbitrarily selected by the designer. For ease of design, it is best to use the largest pipe diameter as the reference pipe. The other incoming pipe are determined by their angle, x and y, to this reference pipe. The following illustration and corresponding equations are used for making these ...

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  • Washington, D.C. September 1999 Collection Systems …

    United States Environmental Protection Agency Office of Water Washington, D.C. DESCRIPTION As sewer system networks age, the risk of deterioration, blockages, and collapses becomes a major concern. As a result, municipalities worldwid e are taking proactive measures to improve performance levels of their sewer systems.

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  • Minimum Installation and Testing Requirements

    D. The minimum cover for ductile iron pipe is 30 inches. 2 INSTALLATION OF NEW WATER SERVICES A. The installation of all new water services shall be done in accordance with the latest revision of AWWA Standard C600, C901 and C902 plus the additional requirements …

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  • Pipe Bedding and Backfill - Bureau of Reclamation

    Flexible pipe is designed to transmit the load on the pipe to the soil at the sides of the pipe. As the load on the pipe increases, the vertical diameter of the pipe decreases and the horizontal diameter increases. The increase in horizontal diameter is resisted by the soil at the sides of the pipe. The soil must be strong enough so

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  • Chapter 6 Storm Sewer - Washington State Department …

    This should be a minimum of 8 inches or 0.67 feet (200 millimeters) for any pipe run with a length of 50 feet (15 meters) or less. Pipes runs longer than 50 feet (15 meters) must have a minimum diameter of 12 inches or 1 foot (300 millimeters). Pipe sizes should never decrease in the downstream direction.

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  • API Standard 1104 - Welding of Pipeline and Related ...

    Table 2 prescribes the number and type of test specimens that must be tested depending upon the diameter and wall thickness of the test weld. For example, if the test weld was made on 16” diameter x .375” wall pipe 16 total test specimens would be rquired (4 tensile, 4 …

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  • Fiberglass Pipe Past, Present and Future

    IV. Machine Made Piping. In the 1960’s an efficient high volume continuous pipe production process was developed for small diameter pipe rated for pressures (up to 450 psi). Large scale use of this pipe began in 1964 and was primarily installed in two inch crude oil gathering lines.

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