定价： 605元 / 折扣价： 515 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 481元 / 折扣价： 409 元

定价： 481元 / 折扣价： 409 元 加购物车

定价： 605元 / 折扣价： 515 元

定价： 0元 / 折扣价： 0 元 加购物车

定价： 689元 / 折扣价： 586 元 加购物车

定价： 481元 / 折扣价： 409 元 加购物车

定价： 689元 / 折扣价： 586 元

5.1 The principal underlying the test is the sensitivity of the electrical contact interface to temperature and humidity cycling that electrical pressure connection systems experience as a result of usage and installation environment. The temperature cycling may cause micromotion at the mating electrical contact surfaces which can expose fresh metal to the local ambient atmosphere. The humidity exposure is known to facilitate corrosion on freshly exposed metal surfaces. Thus, for those connection systems that do not maintain stable metal-to-metal contact surfaces under the condition of thermal cycling and humidity exposure, repeated sequences of these exposures lead to degradation of the contacting surface indicated by potential drop increase.5.2 The test is of short duration relative to the expected life of connections in residential usage. Stability of connection resistance implies resistance to deterioration due to environmental conditions encountered in residential service. Increasing connection resistance as a result of the test exposure indicates deterioration of electrical contact interfaces. Assurance of long term reliability and safety of connection types that deteriorate requires further evaluation for specific specified environments and applications.5.3 Use—It is recommended that this test method be used in one of two ways. First, it may be used to evaluate and report the performance of a particular connection system. For such use, it is appropriate to report the results in a summary (or tabular) format such as shown in Section 17, together with the statement “The results shown in the summary (or table) were obtained for (insert description of connection) when tested in accordance with Test Method B812. Second, it may be used as the basis for specification of acceptability of product. For this use, the minimum test time and the maximum allowable increase in potential drop must be established by the specifier. Specification of connection systems in accordance with this use of the standard test method would be of the form: “The maximum potential drop increase for any connection, when tested in accordance with Test Method B812 for a period of weeks, shall be mV relative to the reference connections.” Connection systems that are most resistant to thermal-cycle/humidity deterioration, within the limitations of determination by this test method, show no increase in potential drop, relative to the reference connections, when tested for indefinite time. Connections that are less resistant to thermal-cycle/humidity conditions applied by this test will demonstrate progressive increases in potential drop with increasing time on test. Thus, the following examples of specifications are in the order of most stringent (No. 1) to least stringent (No. 3).  Duration, weeks Maximum Potential Drop Increase, mV1. 52 02. 16 0.23. 4 1.01.1 This test method covers all residential pressure connection systems. Detailed examples of application to specific types of connection systems, set-screw neutral bus connectors and twist-on wire-splicing connectors, are provided in Appendix X1 and Appendix X2.1.2 The purpose of this test method is to evaluate the performance of residential electrical pressure connection systems under conditions of cyclic temperature change (within rating) and high humidity.1.3 The limitations of the test method are as follows:1.3.1 This test method shall not be considered to confirm a specific lifetime in application environments.1.3.2 The applicability of this test method is limited to pressure connection systems rated at or below 600 V d-c or a-c RMS.1.3.3 This test method is limited to temperature and water vapor exposure in addition to electrical current as required to measure connection resistance.1.3.4 This test method does not evaluate degradation which may occur in residential applications due to exposure of the electrical connection system to additional environmental constituents such as (but not limited to) the following examples:1.3.4.1 Household chemicals (liquid or gaseous) such as ammonia, bleach, or other cleaning agents.1.3.4.2 Chemicals as may occur due to normal hobby or professional activities such as photography, painting, sculpture, or similar activities.1.3.4.3 Environments encountered during construction or remodeling such as direct exposure to rain, uncured wet concrete, welding or soldering fluxes and other agents.1.3.5 This test method is limited to evaluation of pressure connection systems.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to electrical current flow under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual installation conditions or under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车

This specification establishes the requirements and test methods for 1/2 in. through 14 in. multilayer polyethylene-polyamide (PE-PA) pipe, which is a two-layer pipe (PE pipe layer bonded to an inner layer of PA). It covers the multilayer pipe for use in piping applications where the permeation and chemical resistance of PA compounds may be useful to protect the PE pipe layer, such as oil and gas producing applications that convey oil, dry or wet gas, and multiphase fluids. Electrofusion and mechanical joints are typically used for this multilayer pipe.1.1 This specification covers requirements and test methods for 1/2 in. through 14 in. multilayer polyethylene-polyamide (PE-PA) pipe, which is a two-layer pipe (PE pipe layer bonded to an inner layer of PA). The multilayer pipe covered by this specification is intended for use in piping applications where the permeation and chemical resistance of polyamide (PA) compounds may be useful to protect the PE pipe layer, such as oil and gas producing applications that convey oil, dry or wet gas, and multiphase fluids.NOTE 1: Permeability and chemical resistance depends on the type of PA used. The PA layer delays but does not prevent liquid hydrocarbons effects. Therefore, the hydrocarbon chemical design factor for this multilayer pipe should be the same as for PE pipe layer—see X1.2.1.2 Electrofusion and mechanical joints are typically used for this multilayer pipe.1.3 Unless specified otherwise, all the pipe requirements in this specification are for the multilayer pipe.1.4 The PA layer is not taken into consideration for the design pressure of multilayer pipe meeting this specification. Design pressure rating is determined from the PE pipe layer alone—see Appendix X1.1.5 Units—The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.6 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in figures and tables) shall not be considered as requirements of the standard.1.7 The following precautionary caveat pertains only to the test method portion, Section 6, of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers hubless cast iron soil pipe and fittings for use in gravity flow applications. These pipe and fittings are intended for non-pressure applications, as the selection of the proper size for sanitary drain, waste, vent, and storm drain systems allows free air space for gravity drainage. The pipe and fittings shall be iron castings suitable for installation and service for sanitary, storm drain, waste, and vent piping applications. The pipe and fittings shall meet all applicable requirements and tests given in this specification. Tensile test and chemical test shall be made to conform to the requirements specified. The pipe and fittings shall be uniformly coated with a material suitable for the purpose that is adherent, not brittle, and without a tendency to scale.1.1 This specification covers hubless cast iron soil pipe and fittings for use in gravity flow applications. It establishes standards covering material, manufacture, mechanical and chemical properties, dimensions, coating, test methods, inspection, certification, and product marking for hubless cast iron soil pipe and fittings. These pipe and fittings are intended for non-pressure applications, as the selection of the proper size for sanitary drain, waste, vent, and storm drain systems allows free air space for gravity drainage.1.2 The EDP/ASA numbers indicated in this section represent a Uniform Industry Code adopted by the American Supply Association (ASA). A group designation prefix, 022, is assigned to hubless products, followed by the four-digit identification assigned to individual items and a check digit. This system has been instituted to facilitate EDP control through distribution channels, and is to be used universally in ordering and specifying product items. Those items with no EDP numbers are either new, special, or transitory and will be assigned numbers on subsequent prints of this specification.1.3 This specification covers pipe and fittings of the following patterns and applies to any other patterns that conform with the dimensions found in Tables 1 and 2 and all other applicable requirements given in this specification.21.3.1 Lengths:  FiguresEDP/ASA Identification Numbersfor Hubless Pipe Fig. 110 ft (3.0 m) in sizes and 5 ft. (1.5 m)11/2 , 2, 3, 4, 5, 6, 8,10, 12, and 15 in. Fig. 1, Fig. 2Method of Specifying Fittings Fig. 31.3.2 Fittings: Quarter Bend Fig. 5Quarter Bend, Reducing Fig. 6Quarter Bend, with Side Opening Fig. 7Quarter Bend, with Heel Opening Fig. 8Quarter Bend, Tapped Fig. 9Quarter Bend, Double Fig. 10Quarter Bend, Long Fig. 11Short Sweep Fig. 12Long Sweep Fig. 13Long Sweep, Reducing Fig. 14Fifth Bend Fig. 15Sixth Bend Fig. 16Eighth Bend Fig. 17Eighth Bend, Long Fig. 18Sixteenth Bend Fig. 19Sanitary Tee Fig. 20Sanitary Tee with Side Opening Fig. 21Sanitary Tee with 2 in. Side Opening R or L/R and L Fig. 22Sanitary Tee, New Orleans Special with Side Opening Fig. 23Sanitary Tee with 45° Side Openings and New Orleans Fig. 24Sanitary Special Tee Tapped Fig. 25Sanitary Tapped Tee, Horizontal Twin Fig. 26Sanitary Tapped Tee, Double Vertical Fig. 27Y Branch Fig. 28Y Branch, Double Fig. 29Y Branch, Upright Fig. 30Upright Y Wide Center Florida Special Fig. 31Y Branch, Combination 1/8 Bend Fig. 32Y Branch, Combination 1/8 Bend Double Fig. 33Sanitary Cross Fig. 34Sanitary Cross with Side Opening Fig. 35Sanitary Cross, New Orleans, with Side Openings Fig. 36Sanitary Cross, New Orleans, with 45° Special and Regular Side Openings Fig. 37Sanitary Cross, Tapped Fig. 38Test Tee Fig. 39Tapped Extension Piece Fig. 40Increaser-Reducer Fig. 41Increaser-Reducer, Short Fig. 42Tapped Adapter Fig. 43Blind Plug Fig. 44Iron Body Cleanout, Tapped Fig. 45P Trap Fig. 46P Trap, Long Fig. 47P Trap, Deep Seal Fig. 48P Trap, with Primer Fig. 49P Trap, with Tapped Inlet Fig. 50Tapped Inlet, Double Fig. 51Modified Combination Wye and 1/8  Bend, Double Fig. 52Modified Combination Wye and 1/8  Bend, Double, Extended Fig. 53Two-Way Cleanout Fig. 54Twin Cleanout Fig. 55Closet Bend, Regular and Reducing Fig. 56Closet Flange Riser Fig. 57Tapping Bosses Fig. 58Double Sweep Sanitary Tee (Extended) Fig. 59Running Trap with Double Vents Fig. 60P Trap with Tapped or Hubless Side Inlet Fig. 61Vented Tub Wye Extended, Double Fig. 62Vented Tub Wye Extended Offset, Left or Right Fig. 63Vented Tub Wye Fig. 64Double Two-Way Cleanout Fig. 651.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.5 The committee with jurisdiction over this standard is aware of another comparable standard published by the Cast Iron Soil Pipe Institute, CISPI 301.NOTE 1: The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 983元 / 折扣价： 836 元 加购物车