定价： 605元 / 折扣价： 515 元 加购物车

1.1 This specification covers the aluminum bronze rod, bar and shapes for copper alloys UNS Nos. C60600, C61300, C61400, C61900, C62300, C62400, C63000, C63020, C63200, C64200 and C64210. Note 1-Material for hot forging is described in Specification B124M. Note 2-This specification is the metric companion to Specification B150. Note 3: Warning-Mercury is a definite health hazard in use and disposal (see 9.1).

定价： 0元 / 折扣价： 0 元

定价： 260元 / 折扣价： 221 元 加购物车

This specification covers single-cell precast conventionally reinforced concrete three-sided structures intended to be used for the construction of culverts and for the conveyance of storm water. Precast reinforced concrete three-sided structures manufactured in accordance with this specification shall be designated by span, rise, and design earth cover. The reinforced concrete shall consist of cementitious materials, mineral aggregates and water, in which steel has been embedded in such a manner that the steel and concrete act together. The three-sided section's dimensions and reinforcement details shall be as required by design. Splices in the circumferential reinforcement shall be made by lapping. The precast reinforced concrete three-sided structures shall be produced with tongue and groove ends, flat butt ends or key-way ends. The aggregates shall be sized, graded, proportioned, and mixed with such proportions of cementitious materials and water as will produce a homogeneous concrete mixture of such quality that each section will conform to the test and design requirements. The three-sided sections shall be cured for a sufficient length of time so that the concrete will develop the required compressive strength. The forms used in manufacture shall be sufficiently rigid and accurate to maintain the three-sided section dimensions within the permissible variations. Handling devices or holes shall be permitted in each three-sided section for the purpose of handling and laying. Cylinders and cores shall be obtained and tested for compressive strength to meet the requirements prescribed.1.1 This specification covers single-cell precast conventionally reinforced concrete three-sided structures intended to be used for the construction of culverts and for the conveyance of storm water.1.2 This specification is the metric counterpart of Specification C1504; therefore, no imperial (metric) equivalents are presented in this specification.NOTE 1: This specification is primarily a manufacturing and purchasing specification. The successful performance of this product depends upon the proper selection of the geometric section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete three-sided structure specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the geometric section specified and provisions for inspection at the construction site are required.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.4 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

This specification covers concrete drain tile, to be used for surface and subsurface drainage. Manufactured drain tile shall be of the following classes: standard-quality concrete drain tile, extra-quality concrete drain tile, heavy-duty extra-quality concrete drain tile, and special-quality concrete drain tile. The concrete shall consist of mineral aggregates, water, and cementitious materials that include Portland cement, fly ash, ground granulated blast furnace slag, aggregates, admixtures and blends, and synthetic fibers. Concrete drain tile shall meet the physical requirement of the specification according to class, depending on soil acidity and sulfate content. Test specimens shall meet the external load crushing strength test requirement of the specification.1.1 This specification covers concrete drain tile with internal diameters from 100 to 900 mm, that are intended to be used for surface and subsurface drainage.1.2 This specification is the metric counterpart of Specification C412.NOTE 1: This specification is a manufacturing and purchase specification only and does not include requirements for bedding, backfill, or the relationship between field load condition and the strength classification of drain tile. However, experience has shown that the successful performance of the product depends upon the proper selection of the class of drain tile, type of bedding and backfill, and care that the installation conforms to the construction specifications. The owner is cautioned that he must correlate the field requirements with the class of drain tile specified and provide for or require inspection at the construction site.1.3 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

1.1 This specification establishes the requirements for copper-nickel-zinc and copper-nickel rod and bar for general applications produced from Copper Alloy UNS Nos. C70600, C71500, C74500, C75200, C75700, C76400, C77000 and C79200. 1.2 The values given in SI units are the standard. 1.3 This specification is the companion to inch-pound Specification B151. Note 1-Requirements for copper-nickel-zinc alloy wire appear in Specification B206M.

定价： 0元 / 折扣价： 0 元

1.1 This specification establishes the requirements for copper sheet, strip, plate, and rolled bar. Various coppers are covered and when no particular copper is specified, any one of the following may be supplied: Copper Previous UNS No. 3 Designation A Type of Copper C 10100 OFE Oxygen-free electronic C 10200 B OF Oxygen-free without residual deoxidants C 10300 ... Oxygen-free, extra low phosphorus C 10400, C10500, OFS Oxygen-free, silver bearing C 10700 C 10800 ... Oxygen-free, low phosphorus C 11000 B ETP Electrolytic tough pitch C 11300, C11400, STP Silver bearing tough pitch C 11600 B C 12000 DLP Phosphorized, low residual phosphorus C 12200 B DHP Phosphorized, high residual phosphorus C 12300 DPS Phosphorized, silver bearing C 14200 DPA Phosphorus deoxidized, arsenical C 14420 ... Tin bearing tellurium copper C 14530 ... Tin tellurium bearing copper A Except Copper UNS No. C10300 (oxygen-free extra low phosphorus) and No. C10800 (oxygen-free low phosphorus) these types of copper are classified in Classification B 224. B SAE specification CA101 conforms to Copper UNS No. C10100; SAE Specification CA102 conforms to the requirements for Copper UNS No. C10200; SAE Specification CA110 conforms to the requirements for Copper UNS No. C11000; SAE Specifications CA113, CA114, and CA116 conform to the requirements for Copper UNS Nos. C11300, C11400, and C11600; SAE Specification CA120 conforms to Copper UNS No. C12000 and SAE Specification CA122 conforms to the requirements for Copper UNS No. C12200.

定价： 0元 / 折扣价： 0 元

This specification establishes allowable limits for the various types of surface discontinuities that may occur during the manufacture and processing of bolts, screws, and studs, including heat-treated machine screws, tapping screws, and sems. Types of surface discontinuities are: crack; burst; seam; fold; thread lap; void; tool marks; and gouge and nick. These surface discontinuities shall be inspected in accordance with the specified requirements.1.1 This specification establishes allowable limits for the various types of surface discontinuities that may occur during the manufacture and processing of bolts, screws, studs, and rivets including heat-treated machine screws, tapping screws, and sems (the washers of screw-washer assemblies are excluded). This specification covers metric series products with nominal diameters of 4 mm and larger and with specified minimum tensile strengths of 420 MPa and higher; and inch series products with nominal diameters of No. 5 (0.1250 in.) and larger and with specified minimum tensile strengths of 60 000 psi and higher.1.2 When the engineering requirements of the application necessitate control of surface discontinuities on bolts, screws, studs, or rivets, the purchaser shall specify conformance to ASTM Specification F788/F788M, in the original inquiry and purchase order.1.2.1 When the engineering requirements of the application necessitate that surface discontinuities on bolts, screws, studs, and rivets be controlled within limits closer than those specified in this specification, the purchaser shall specify the applicable limits in the original inquiry and purchase order.1.3 The allowable limits established in this specification for metric bolts, screws, and studs with nominal diameters from 4 to 24 mm inclusive, are essentially identical with requirements given in ISO 6157/I. There are no ISO standards for surface discontinuities on any inch-series products, or for rivets.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.5 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

1.1 This specification covers crosslinked polyethylene (PEX) pipe that is outside diameter controlled in metric pipe sizes (DN 16 to 1000) and inch pipe sizes (NPS 3 to 54), and pressure rated (see Appendix X1) using the MRS rating system. This Specification is intended for PEX pipe made by various processes, as long as the PEX pipe made by that process meets all the requirements of this Specification. Included are requirements and test methods for material, workmanship, UV protection, dimensions, hydrostatic sustained pressure, environmental stress cracking, stabilizer functionality, bent-pipe hydrostatic pressure, oxidative stability in potable chlorinated water, minimum operating temperature, degree of crosslinking, and hydrostatic burst pressure. Requirements for pipe markings are also given. The pipe covered by this specification is intended for pressure piping applications such as, industrial and general-purpose pipelines, potable water pipelines, fire – extinguishing pipelines, oil and gas producing applications to convey fluids such as oil, dry or wet gas, gas gathering, multiphase fluids, and non-potable oilfield water, and chemical pipelines. It is not intended for municipal natural gas distribution.1.2 This specification also includes requirements for qualifying joints made using polyethylene electrofusion fittings and PEX pipe. Installation considerations are in X3.2.NOTE 1: NPS fittings should not be used for DN sized pipe, and DN sized fittings should not be used for NPS pipe.1.3 The text of this specification references notes, footnotes, and appendixes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) should not be considered as requirements of the specification.1.4 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.4.1 For consistency with ISO 9080, MRS values are only in MPa and degrees Centigrade for conversion to the pipe material designation code (for example PEX pipe with an MRS of 8 MPa is called a PEX 80.1.5 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.1.6 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

1.1 This specification establishes the requirements for round, square and flat phosphor bronze wire of UNS Alloy Nos. C51000, C52100 and C52400 for general and spring applications. 1.1.1 Rectangular and square wire of the three alloys are generally available in sizes up to a maximum of 5 mm thick and 32 mm wide. 1.1.2 Round wire from Copper Alloy UNS No. C51000 is generally available in sizes up to 13 mm in diameter. 1.1.3 This specification is the SI companion to Specification B159. Note 1-It is to be understood that this specification is general. Since the product is used for many applications where the requirements of the operations used are too particular to be specified by any of the ordinary mechanical tests, it is frequently advisable to submit samples or drawings to the manufacturer and secure an adjustment of temper to suit the actual application for which the product is intended. Note 2- Product in rod, bar and shape form is produced to Specification B139M.

定价： 0元 / 折扣价： 0 元

This specification covers the requirements and testing procedures for five types of electrical insulation monitoring devices intended as permanently installed units that are used in the detection of ohmic insulation faults to ground in active AC ungrounded electrical systems. This specification does not address devices which are not intended for DC or AC ungrounded systems that operated with DC components, unless AC to DC conversion is isolated from the monitored system with transformers. Information required in the equipment manual that shall be provided with this system are also detailed.1.1 This specification covers electrical insulation monitoring devices intended as permanently installed units for use in the detection of ohmic insulation faults to ground in active AC ungrounded electrical systems.1.2 Limitations—This specification does not cover devices which are not intended for operation for: DC ungrounded systems or AC ungrounded systems with DC components unless AC to DC conversion is isolated from the monitored system with transformers.1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are included for information only and are not considered standard.1.4 The following precautionary caveat pertains only to the test methods portion, Section 9, 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.1.5 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： 515元 / 折扣价： 438 元 加购物车

Information technology - Open Systems Interconnection - Systems Management: Metric objects and attributes AMENDMENT 1: Implementation conformance statement proformas

定价： 1411元 / 折扣价： 1200 元

This specification covers the general requirements for carbon steel wire rods and uncoated coarse round wire in coils or straightened and cut lengths. Chemical compositions are specified by ranges or limits for carbon and other elements. The grades commonly specified for carbon steel wire rods and coarse round wire are presented. Grain size, when specified, and the mechanical properties enumerated in individual specifications shall be determined in accordance with reference test materials.1.1 This specification covers general requirements for carbon steel wire rods and uncoated coarse round wire in coils or straightened and cut lengths.1.2 In case of conflict, the requirements in the purchase order, on the drawing, in the individual specification, and in this general specification shall prevail in the sequence named.Note 1—This metric specification is equivalent to Specification A 510, and is compatible in technical content.1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

定价： 0元 / 折扣价： 0 元

定价： 819元 / 折扣价： 697 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车