{"id":77918,"date":"2024-10-17T18:08:15","date_gmt":"2024-10-17T18:08:15","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d2992-2012\/"},"modified":"2024-10-24T19:35:00","modified_gmt":"2024-10-24T19:35:00","slug":"astm-d2992-2012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d2992-2012\/","title":{"rendered":"ASTM-D2992 2012"},"content":{"rendered":"
\n Significance and Use<\/b><\/p>\n

This practice is useful for establishing the hoop stress or internal pressure versus time-to-failure relationships, under selected internal and external environments which simulate actual anticipated product end-use conditions, from which a design basis for specific piping products and materials can be obtained. This practice defines an HDB for material in straight, hollow cylindrical shapes where hoop stress can be easily calculated, and a PDB for fittings and joints where stresses are more complex.<\/p>\n

An alternative design practice based on initial strain versus time-to-failure relationships employs a strain basis HDB instead of the stress basis HDB defined by this practice. The strain basis HDB is most often used for buried pipe designs with internal pressures ranging from 0 to 250 psig (1.72 MPa).<\/p>\n

To characterize fiberglass piping products, it is necessary to establish the stress versus cycles or time to failure, or pressure versus cycles or time to failure relationships over three or more logarithmic decades of time (cycles or hours) within controlled environmental parameters. Because of the nature of the test and specimens employed, no single line can adequately represent the data. Therefore, the confidence limits should be established.<\/p>\n

Pressure ratings for piping of various dimensions at each temperature may be calculated using the HDS determined by testing one size of piping provided that the same specific process and material are used both for test specimens and the piping in question.<\/p>\n

Pressure ratings at each temperature for components other than straight hollow shapes may be calculated using the HDP determined by testing one size of piping provided that ( 1<\/span> ) the specific materials and manufacturing process used for the test specimens are used for the components, ( 2<\/span> ) for joints, the joining materials and procedures used to prepare the test specimens are used for field joining, and ( 3<\/span> ) scaling of critical dimensions is related to diameter and pressure rating of the component.<\/p>\n

Note<\/span> 8\u2014Scaling of fittings and joints should be further verified by short-time testing in accordance with Test Method D1599 .<\/p>\n

Results obtained at one set of environmental conditions should not be used for other conditions, except that higher temperature data can be used for design basis assignment for lower application temperatures. The design basis should be determined for each specific piping product. Design and processing can significantly affect the long-term performance of piping products, and therefore should be taken into consideration during any evaluation.<\/p>\n

This practice is valid for a given pipe or fitting only so long as the specimens are truly representative of that material and manufacturing process.<\/p>\n

Changes in materials or manufacturing processes will necessitate a reevaluation as described in Section 12.<\/p>\n

PROCEDURE A<\/h3>\n
\n Top\n <\/div>\n

1. Scope<\/b><\/p>\n

1.1 This practice establishes two procedures, Procedure A (cyclic) and Procedure B (static), for obtaining a hydrostatic design basis (HDB) or a pressure design basis (PDB) for fiberglass piping products, by evaluating strength-regression data derived from testing pipe or fittings, or both, of the same materials and construction, either separately or in assemblies. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipe.<\/p>\n

Note<\/span> 1\u2014For the purposes of this standard, polymer does not include natural polymers.<\/p>\n

1.2 This practice can be used for the HDB determination for fiberglass pipe where the ratio of outside diameter to wall thickness is 10:1 or more.<\/p>\n

Note<\/span> 2\u2014This limitation, based on thin-wall pipe design theory, serves further to limit the application of this practice to internal pressures which, by the hoop-stress equation, are approximately 20 % of the derived hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34 500 kPa), the pipe is limited to about 1000-psig (6900-kPa) internal pressure, regardless of diameter.<\/p>\n

1.3 This practice provides a PDB for complex-shaped products or systems where complex stress fields seriously inhibit the use of hoop stress.<\/p>\n

1.4 Specimen end closures in the underlying test methods may be either restrained or free, leading to certain limitations.<\/p>\n

1.4.1 Restrained Ends<\/span> \u2014<\/span> Specimens are stressed by internal pressure only in the hoop direction, and the HDB is applicable for stresses developed only in the hoop direction.<\/p>\n

1.4.2 Free Ends<\/span> \u2014<\/span> Specimens are stressed by internal pressure in both hoop and longitudinal directions, such that the hoop stress is twice as large as the longitudinal stress. This practice may not be applicable for evaluating stresses induced by loadings where the longitudinal stress exceeds 50 % of the HDS.<\/p>\n

1.5 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are given for information purposes only.<\/p>\n

Note<\/span> 3\u2014There is no known ISO equivalent to this standard.<\/p>\n

1.6 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 and health practices and determine the applicability of regulatory limitations prior to use.<\/span><\/p>\n

2. Referenced Documents<\/b> (purchase separately)<\/i> The documents listed below are referenced within the subject standard but are not provided as part of the standard.<\/span><\/p>\n

ASTM Standards<\/b><\/p>\n

D618 Practice for Conditioning Plastics for Testing D883 Terminology Relating to Plastics D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings D1600 Terminology for Abbreviated Terms Relating to Plastics D2143 Test Method for Cyclic Pressure Strength of Reinforced, Thermosetting Plastic Pipe D3567 Practice for Determining Dimensions of Fiberglass (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings F412 Terminology Relating to Plastic Piping Systems F948 Test Method for Time-to-Failure of Plastic Piping Systems and Components Under Constant Internal Pressure With Flow<\/p>\n

Keywords<\/b><\/p>\n

closure; cyclic pressure; design basis; fiberglass pipe; reconfirmation; static pressure ; Fiberglass pipe; Glass-fiber-reinforced thermosetting resin (\u201cfiberglass\u201d); Hoop stress test; Hydrostatic design basis (HDB); Hydrostatic testing; Long-term hydrostatic strength\/pressure; PDB (pressure design basis); Pressure design basis (PDB); Pressure testing–plastic pipe\/tube; Pressure versus cycles\/time to failure; Reinforced thermosetting-resin pipe (RTRP); RPMP (reinforced polymer mortar pipe); Stress–plastics; Stress versus cycles\/time to failure; Thermosetting plastic pipe\/tubing\/fittings; Time-to-failure (TTF)<\/p>\n

ICS Code<\/b><\/p>\n

ICS Number Code 23.040.20 (Plastic pipes); 23.040.45 (Plastic fittings)<\/p>\n

DOI:<\/b> 10.1520\/D2992-\n<\/div>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\nScope
Referenced Documents <\/td>\n<\/tr>\n
2<\/td>\nTerminology
Summary of Practice <\/td>\n<\/tr>\n
3<\/td>\nSignificance and Use
Long-Term Cyclic Hydrostatic Strength or Long-Term Cyclic Hydrostatic Pressure <\/td>\n<\/tr>\n
4<\/td>\nCyclic Hydrostatic Design Basis
Cyclic Pressure Design Basis
Long-Term Static Hydrostatic Strength
TABLE 1 <\/td>\n<\/tr>\n
5<\/td>\nStatic Hydrostatic Design Basis
Static Pressure Design Basis
Reconfirmation of HDB or PDB
TABLE 2 <\/td>\n<\/tr>\n
6<\/td>\nHydrostatic Design Stress or Hydrostatic Design Pressure
Pressure Rating
Report
Precision and Bias
Keywords <\/td>\n<\/tr>\n
7<\/td>\nA1. LEAST SQUARES CALCULATIONS FOR LONG-TERM HYDROSTATIC STRENGTH OR LONG-TERM HYDROSTATIC PRESSURE
A1.1 General
A1.2 Procedure for Analysis of Data
A1.3 Assignment of Variables
A1.4 Functional Relationship Equations and Method of Calculation
TABLE A1.1 <\/td>\n<\/tr>\n
8<\/td>\nTABLE A1.2 <\/td>\n<\/tr>\n
9<\/td>\nX1. DATA ANALYSIS
X1.1
X1.2 <\/td>\n<\/tr>\n
10<\/td>\nX2. EXAMPLE CALCULATION
X2.1
X2.2
X2.3
X2.4
X2.5
X2.6
TABLE X2.1 <\/td>\n<\/tr>\n
11<\/td>\nTABLE X2.2 <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

D2992-12 Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2012<\/td>\n11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":77919,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[349,351,2637],"product_tag":[],"class_list":{"0":"post-77918","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-23-040-20","7":"product_cat-23-040-45","8":"product_cat-astm","10":"first","11":"instock","12":"sold-individually","13":"shipping-taxable","14":"purchasable","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/77918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/77919"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=77918"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=77918"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=77918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}