ABNT测试标准

Summary 概述Preface 序言1 Objective 目标2 Standard References 标准3 Definitions 定义4 General Requirements 总的要求5 Specific Requirements 明细要求6 Quality Tests 质量检测实验7 Inspection 检验8 Acceptance and Rejection 合格或者拒收9 Quality Warranty System 质量保证体系Annex 附件A Index of Fittings Types 管件类型索引B Types and Dimension of Edges 边缘类型和尺寸C Mountaing Nominal Length 结构长度D Plane Faces Height 平面高度E Fittings Dimensions 管件尺寸F Sampling Planes for Receiving Inspection 检验样品计划Preface 序言The ABNT –Associação Brasileira de Normas Técnicas, the Brazilian Association of Technical Standards, is the Brazilian national forum of standardization. The Brazilian Standards, whose contents is under responsibility of the Brazilian Committees (ABNT/CB) and Sector Normalization Organisms (ABNT/ONS), are elaborated by Study Commissions (CE), formed by involved sectors representatives, taking part: producers, consumers and neutrals (universities, laboratories and others).ABNT（巴西技术标准协会）是巴西国家标准协会，巴西标准是由来自生产商，消费者和一些中立机构例如大学、实验室或他组成的代表详细制定。

巴西标准内容建立在ABNT和标准化委员会负责的基础之上，并由研究委员会负责解释。

The Projects of Brazilian Standard, elaborated in the ABNT/CB and ABNT/ONS ambit, circulate by public consult among associated people of ABNT and remaining interested parties.This standard contains the Annex A till F of normative character.1.Subject1.1This standard adjust the demanded conditions for manufacturing,acceptance and reception of malleable cast iron fittings, for using in water, gas, steam, oil and hydraulic in general.1.2This standard must be applied for pipe fittings, galvanized or not, withscrew thread according to NBR NM-ISO 7-1 for application under service maximum pressure of 2,5 MPa at temperature of 120o C and pressures linearly interpolated between 2,5 MPa and 2,0 MPa at temperatures between 120o C and 300o C and pressure of 2,0 MPa at 300o C.1.3The pipe fittings of this standard are applied to fluid conduction systemswith steel galvanized pipes according to NBR 5580 or another with screw thread according to NBR NM-ISO 7-1.2.Standard referencesThe following standards have dispositions that, when mentioned in this text, consists prescription for this NBR 6943 Standard. The indicated editions were not expired at the moment of this publication. Once every standard is subjected to be revised occasionally it is recommended the use of the most recent editions of the following standards mentioned. ABNT has the information of standards not expired or valid in a determined date.NBR 5580: 1993 –Carbon Steel Tube for Whitworth gas thread for common use in fluid conduction - SpecificationNBR 6323: 1981 –Product of Steel or cast iron, zinc plated by hot deep galvanization - SpecificationNBR 6590: 1981 – Black nucleus malleable cast iron - SpecificationNBR 7398: 1990 - Product of Steel or cast iron, zinc plated by hot deep galvanization – Coating adherence verification – Method of TestNBR 7399: 1990 - Product of Steel or casting iron, zinc plated by hot deep galvanization – Coating thickness verification by no-destructive test – Method of TestNBR 7400: 1990 - Product of Steel or casting iron, zinc plated by hot deep galvanization - Coating uniformity verification – Method of TestNBR 8133: 1983 – Pipe threads where pressure-tight joints are not made on the threads – Designation, dimensions and tolerances - StandardizationNBR 8194: 1997 –Water meters for cold water with Nominal Outflow until 15.0 cubic meters per hour.NBR 8417: 1999 –Water building branch system –Polyethylene Tubes PE –RequirementsNBR 9052: 1985 –Rigid PVC fittings for mechanical joints for polyethylene Tubes PE 5 for water building branch system – SpecificationNBR NM-ISO 7-1: 2000 – Pipe threads where pressure-tight joints are made on the threads – Part 1: dimensions, tolerances and designations.ASTM F 104: 1993 –Standard classification system for non metallic gasket materialISO FDIS 7-2: 1999 – Pipe threads where pressure-tight joints are made on the threads – Part 2: verification by means of limit gaugesISO 228-2: 1987 - Pipe threads where pressure-tight joints are not made on the threads – Part 2: verification by means of limit gaugesISO 7005-2: 1988 – Metallic flanges – Part 2: Cast iron flanges3.Definitions3.1Nominal Diameter (DN):The number that classifies, in dimension, thepipe elements (pipes and fittings). The number that corresponds approximately the internal diameter of pipe system, in millimeters. The DN must not be object of measure nor be used for calculation. For reference effects is presented in parenthesis, besides dimension of DN, its value in inches.3.2Code of Connection (fittings):Alphanumeric code that identifies eachkind of fittings as indicated in this standard.3.3Connection (fittings): device that has the function of joining pipes, otherfittings or blockading a fluid flux in tubes.3.4Female Fittings: fittings whose threads are internal3.5Male Fittings: fittings whose threads are external3.6Male and Female Fittings (MF): fittings that have both internal andexternal threads3.7Nominal Length of Mounting (CM): The penetration nominal length ofpipe and or fittings, whose extremities have internal threads, after mounting.3.8Tolerance of plane: the band of tolerance between two parallel planes, thatcheck the regularity of flanges seat faces.3.9Tube of polyethylene PE: The high density polyethylene tube used towater buildings supplies.4.General Requirements4.1The types and codes of fittings are schematically indicated and illustratedin the Annex A.4.2The fittings indicated in this Standard must be manufactured in malleablecast iron according to NBR 6590, class FMP 30006 or FMP 35010.4.3The seal threads must be according to the NBR NM-ISO 7-1, being conicalthe external threads and being parallel the internal threads. In case of mechanical coupling, as: back nuts, lock nuts, nuts of unions, nuts of adapters elbows and adapters sockets for polyethylene PE, the threads must be according to the NBR 8133.4.4The fittings must be supplied galvanized, for hot deep process according tothe NBR 6323, or without galvanization, as ordered by the buyer.4.5All fittings must bring the manufacturer brand and the respective nominaldiameter indication through the visible and indelible way.4.6The fittings must be named as the following:a)mentioning name, or the fittings code, followed by its Nominal Diameter(DN);b)in 900 fittings, this angle indication can be omitted;c)in fittings whose all threads are internal threads, the term “fêmea” (female)can be omitted;d)in fittings whose all extremities have the same Nominal Diameter (DN),this diameter must be mentioned only once;e)in fittings that present extremities with different Nominal Diameters (DN),these diameters must be mentioned in decreasing order;f)in fittings that present more than two extremities with Nominal Diameters(DN) different between them, these diameters must be mentioned according to the order indicated in the Figure 1; and,g)for fittings that do not have code, the name must be done through theirnames and their respective Nominal Diameters (DN).4.7The fittings extremities must present reinforcement border, as types anddimensions defined in the Annex B.4.8The female extremities of bends must be according one of two presentedtypes in the Figure 2. It means smooth (flat) or with purse.4.9In fittings like elbow 450, tee 450, crossing, bend, or lateral exit elbow,reinforcement ribs are admitted, since their heights do not pass their edge heights.4.10The fittings can present the external jutting out, for reference ormachining support, since its height do not pass the edge height.4.11In fittings, like socket and cap, can exist external longitudinal ribs tobecome easy the tools application, since its height do not pass the edge height.4.12The extremities of internal threads start in bevel of 450 and theminimum dimension is equal to the row height of thread.4.13The flanges can be supplied with or without holes, as ordered by thebuyer. The flanges with holes have a circle of holes equal to the flanges for PN 6 of ISO 7005-2.Figure 1 – Denomination sequence of nominal diametersFlat Extremity Extremity with purseFigure 2 – Types of female extremities of bends5.Specific Requirements5.1The length tolerances are function of dimensions according to the table 1.These tolerances refer to face to face dimension, face to centre dimension and centre to centre dimension.5.2The fittings threads axis angles can vary from –0.50to + 0.50at themaximum.5.3The mounting nominal length (CM) presented in the Annex C are justreferences, because they depend of the threads calibration planes variation.For helping in the projects dimensioning, the dimensions (z) are being indicated in the fittings tables.5.4The minimum heights for plane faces for spanners (wrench) application arebeing presented in the Annex D.5.5The hold dimensions (s) of spanners of fittings galvanized or not, mustnot exceed the indicated sizes in the tables E17 till E23 of Annex E.5.6The plugs must have square faces and the remaining fittings with planefaces for spanner application must present hexagonal or octagonal faces.5.7The fittings dimensions must obey the indications of Annex E.Attention: The not specified dimensions in the tables must be according to the manufacturer design.5.8The flanges must be supplied with plane tolerance of seat face according tothe table 2.5.9The dimensions of nuts and tube nuts used for water meters systems mustattend the NBR 8194 Requirements.5.10The chemical composition of zinc coating must not pass thepercentages presented in the table 3.6.Quality TestsThe quality tests must be effected annually in a lot, which number of pieces must be established before performing its tests and the samples must be taken out according to the sampling plane defined in the Annex F and or when there is any modification in the final product or in its raw material. In case of mutual agreement between manufacturer and buyer it can be used an independententity for performing the tests. The certificates must be filed for 5 years and be presented to the buyer once asked.The manufacturer must assure that the fittings attend the requirements established in this Standard through proper controls and tests during the fabrication process, according to items 6.1 till 6.5.6.1 Hydrostatics ResistanceThe fittings must be designed and tested to support, in the environment temperature, internal pressures of:a)10.0 MPa till the Nominal Diameter of DN 100 (4);b) 6.4 MPa for Nominal Diameters of DN 125 (5) and DN 150 (6). Attention: For unions, must be applied a maximum pressure of 1.5 times the service maximum pressure indicated in 1.2.6.2 TractionAccording to the NBR 6590, traction tests must be done in pattern bodies-proof to guarantee the material attends the specification mentioned in 4.2.6.3 MalleabilityProof-bodies must be tested to analyze the material malleability. The proof-bodies consist in gross pieces. It means pieces without any additional operation after thermal treatment of re-cooking. The pipe fittings must not present any fissure or bit in its internal part when compressed in the minimum of : 10 % of its external diameter for fittings from DN 6 (1/8) till DN 50 (2) or 5 % of its external diameter for fittings upper than DN 50 (2), at speed of 1.5 mm/sec.Attention: This test must not be applicable in fittings predominantly massive or fittings that have external hexagon or octagon.6.4 Aromatic SolventsThe aromatic solvents presence must be detected through the laboratory tests. Fittings must not present contamination by Xylene (BTX), toluene and benzene.6.5 Chemical Composition of ZincThe chemical composition of Zinc inside of galvanization basin must be analyzed and it cannot be admitted results upper than mentioned in 5.10.7 InspectionIn the hypothesis of buyer ask the reception inspection in the acquired fittings it must be executed the following tests in the supplier or manufacturer warehouse or plant. The inspection can be executed by buyer or his representative.Attention:1.The maximum lot is 35,000 pieces (unities). The maximum lot can beagreed between supplier and buyer in function of order.2.The manufacturer must put at buyer’s disposal, or his representative,equipments and specialized persons to the tests and verifications. 7.1 Visual ExamIt must be taken place from samples take out of the lot, according to the Table F.1 of Annex F.Fittings must be rejected when presenting oxidation or excessive harsh (no smooth) or eccentricity or trespassed holds or fissures or bits or without threads, among another defects that harm its installation.7.2 Dimension Exam7.2.1 DimensionIt must be taken place from samples take out of the lot, according to the Table F.2 of Annex F.The dimensions must be verified with a paquimeter or with a profile projector. And it must be in conformity with dimensions and tolerances indicated in the respective tables.7.2.2 CalibrationIt must be taken place from samples take out of the lot, according to the Table F.2 of Annex F.The threads must attend the specification of 4.3 and verified using calibrators according to ISO FDIS 7-2 numbers 1 and 3 to the threads according to the NBR NM ISO 7-1 and ISO 228-2 for threads according to NBR 8133.7.2.3 AlignmentIt must be taken place from samples take out of the lot, according to the Table F.4 of Annex F.The thread axis alignment must be verified according to the specification in 5.2 through the profile projector or another specific instrument.7.3 Pump off TestIt must be taken place from samples take out of the lot, according to the Table F.3 of Annex F.After thread machining the fittings must not pump off according to:a) The minimum pneumatic pressure of 0.5 MPa with fittings totally immersed in water; or,b) Minimum hydrostatic pressure of 2,0 MPa.7.4 Zinc Coating7.4.1 Zinc Coating ThicknessIt must be taken place from samples take out of the lot, according to the Table F.2 of Annex F.This test must be taken place according to the NBR 7399. The test must use properly magnetic instrument, or electric, for zinc coating thickness verification (63 μm for individual sample or 70 μm for the average of samples), according to 4.4.Attention: One individual sample consists in the arithmetic average of aleatory 10 measures in a single piece, being 5 internal measures and 5 external measures.7.4.2 Zinc Coating Uniformity TestIt must be taken place from samples take out of the lot, according to the Table F.4 of Annex F.This test must be developed according to the NBR 7400.7.4.3 Adherence TestIt must be taken place from samples take out of the lot, according to the Table F.4 of Annex F.This test must be developed according to the NBR 7398 (Method of Test B). 7.5 Adapter socket for polyethylene (PE) and adapter elbow for polyethylene TestsThe tests described in 7.5.1 and 7.5.2 must be taken place from samples take out of the lot, according to the Table F.4 of Annex F.7.5.1 Pump Off Test of Cold Curved (bended) TubeThis test must be developed according to the item 5.1.2 of NBR 9052:1985.7.5.2 Axial Effort TestThis test must be developed according to the item 5.1.3 of NBR 9052:19857.5.3 Hydrostatic Resistance TestThis test must be developed according to the item 5.2.2 of NBR 9052:19858Acceptance and Rejection 合格和拒收The pipe fittings are accepted once performing all exigencies of this standard. Attention: In case of asked by the buyer, the manufacturer must furnish certificates saying that fittings, object of the purchase, are according to the specification of this Standard.9Quality Warranty System 质量保证体系The fittings manufacturer must implement and maintain the documented quality system.管件生产商必须执行和维护质量体系文件。