| 许多现有的商业、工业和政府标准或规定有助于设计工程师选择塑料管道系统。塑料管道规格说明中最常用到标准是ASTM标准。这些标准也常用作现存其他标准的基础。下面所列是工业塑料管道应用最广泛的一些标准。 Many commercial, industrial, and governmental standards or specifications are available to assist the design engineer in specifying plastic piping systems. Standards most frequently referenced in plastic piping specifications are ASTM Standards. These standards also often form the bases of other standards in existence. Below is a list and description of those standards most typically applied to industrial plastic piping. ASTM标准D-1784 This standard covers PVC and CPVC compounds used in the manufacture of plastic pipe, valves, and fittings. It provides a means for selecting and identifying compounds on the basis of a number of physical and chemical criteria. Conformance to a particular material classification in this standard requires meeting a number of minimum physical and chemical properties. ASTM标准D4101 (以前是D-2146) This standard covers the polymeric content and physical characteristics of PP (polypropylene) plastic materials for injection molding and extrusion. ASTM标准D-3222 This standard covers the polymerization method and physical properties of PVDF (polyvinylidene fluoride) fluoroplastic materials for molding and extrusion. ASTM标准D-1785和F-441 These standards cover the definition and quality aspects of Schedule 40, 80, and 120 PVC (D-1785) and CPVC (F-441) pressure pipe. Outlined in these standards are dimensional requirements, minimum burst and sustained pressure requirements, maximum operating pressure, and test procedures for determining pipe quality with respect to workmanship and materials. ASTM标准D-2466 This standard covers Schedule 40 PVC threaded and socket pressure fittings. The standard stipulates thread and socket specifications as well as minimum lengths, wall thicknesses, burst pressures, material classification, quality, and requirements for marking identification. ASTM标准D-2464和F-437 Until recently, these standards covered PVC (D-2464) and CPVC (F-437) Schedule 80 threaded pressure fitting. Thread dimensional specifications, minimum wall thickness and burst pressure, material classification, and requirements for marking identification were stipulated. However, the requirements for Schedule 80 threaded fittings have now been rolled into the respective standards for Schedule 80 Socket Type Pressure Fittings, and the threaded-only standards will be deleted. ASTM标准D-2467和F-439 These standards now cover Schedule PVC (D-2467) and CPVC (F-439) Socket Type, as well as Threaded Pressure Fittings. They formerly covered only Socket Type fittings. Dimensions, thread gaging, minimum wall thickness and burst pressure, material classification, various quality aspects and requirements for marking identification are stipulated. ASTM标准F-1970 This specification covers special engineered fittings or appurtenances for use in PVC or CPVC systems. Flanges, unions, and valves not included in the scope of other ASTM specifications are specifically referenced. Minimum requirements are identified for testing, materials, dimensions, marking, and in-plant quality control. ASTM标准F-1498 This specification adapts the General Purpose American Pipe Thread Specification, ASME B1.20.1, to taper pipe threads for use on plastic pipe and fittings with machined or molded threads. The standard covers dimensions and gaging of plastic tapered National Pipe Threads (NPT) for leak-tight joints, and it is now referenced in all ASTM Standards for plastic piping products. ASTM标准D-2855 This standard describes the procedure for making joints with PVC pipe and fittings by means of solvent cementing. ASTM标准D-2657 This standard covers the procedures for the heat joining of pipe and fittings made from polyolefin materials utilizing either the socket or butt fusion methods. ASTM标准F-656 This standard covers the requirements for primers to be used in conjunction with solvent cement for the chemical fusion of PVC pipe and fitting joints. | ASTM标准D-2564和F-493 These standards set forth requirements for PVC (D-2564) and CPVC (F-493) Solvent Cement. The specification identifies the resin compound to be used and stipulates minimum resin content, solution viscosities, and physical performance qualities. ASTM标准D-1599 This standard covers the test method for establishing the short-term hydraulic failure pressure of thermoplastic pipe, tubing, and fittings under specific temperature, time, and method of loading conditions. These test techniques are normally used for quality control. ASTM标准D-2837 This standard describes the procedure for obtaining the Hydrostatic Design Stress (maximum working strength) for any thermoplastic pipe material at any practical temperature. This is accomplished by evaluating long-term stress rupture data, tested in conformance with ASTM D-1598, on pipe made from the material. It also specifies the methods for mathematical analysis and treatment of the data. 除了ASTM以外，其它有关组织也颁布一些规定，通常适用于工业热塑塑料管道设计。这些规定中最重要的部分描述如下。 Organizations other than ASTM issue standards that are commonly encountered in industrial thermoplastic piping design. The most important of these are described below. ASTM B1.20.1 (以前是美国标准协会B2.1) This specification details the dimensions and gaging methods for tapered pipe threads. It was originally developed for metallic joints, but it is now also referenced in the ASTM standard for plastic fittings cited above. See page 32 for excerpted details. ASME B16.5 This specification sets forth the dimensional requirements for 150# steel flanges and flanged fittings. The bolt hole pattern and outside diameter dimensions were adopted for plastic flanges manufactured in the U.S.A. See page 32 for pertinent details. ANSI / NSF标准14 This standard establishes minimum physical and performance requirements for plastic piping components and associated materials. It provides definitions and requirements for materials, ingredients, products, quality assurance, marking, and record keeping. Products that are tested and certified by NSF, except those specifically exempted by policy, must bear an NSF listing mark which identifies the intended application. The NSF listing marks for plastic piping components certified under Standard 14 include: potable water (NSF-pw), corrosive waste (NSF-cw), tubular continuous waste (NSFtubular), and drain, waste & vent (NSF-dwv). The “NSF-pw” mark denotes certification to Standard 14 for both performance and health effects (ANSI/NSF 61). ANSI / NSF标准 61 This standard was developed to establish minimum requirements for the control of potential adverse health effects from chemical contaminants and impurities that are indirectly imparted to drinking water systems from products, components, and materials used in these systems. It is intended that this standard cover specific materials or products that come into contact with drinking water, treatment chemicals for drinking water, or both. The products and materials covered include, but are not limited to: process media (carbon, sand, etc.), protective materials (coatings, linings, liners, etc.), joining and sealing materials (solvent cements, welding materials, gaskets, etc.), pipes and related products (pipes, tanks, fittings, etc.), mechanical devices used in treatment/transmission/distribution systems (valves, chlorinators, separation membranes, etc.), and mechanical plumbing devices (faucets, endpoint control valves, etc.). To show compliance to this standard, a manufacturer must allow third-party certification by an ANSI-recognized testing laboratory. Chemtrol products have been tested by NSF International. Products that have been approved to the requirements of ANSI/NSF 61 display the “NSF-61” or “NSF-pw” mark on the product, packaging, or both. |
| 不要将本样本中的测试数据用在压缩空气或其它气体上。如果需要关于专用于压缩空气和其它气体的抗龟裂热塑塑料管道系统请参阅Chemtrol Chem-Aire®产品样本。 Do not use or test the products in this catalog with compressed air or other gases. See Chemtrol Chem-Aire® literature for information about shatter-resistant thermoplastic piping systems specifically designed for compressed air and other gases. |
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