ASME B16.39 pdf download

ASME B16.39 pdf download.Malleable Iron Threaded Pipe Unions Classes 150,250, and 300.
(a) design
(b) pressure—temperature ratings
(c) size
(d) marking
(e) materials
(f) joints and seats
(g) threads
(h) hydrostatic strength
(i) tensile strength
(j) air pressure test
(k) sampling
(l) coatings
(m) dimensions
1.2 References
Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix I. It is not considered practical to identify the specific edition of each referenced standard and specification in the text, when referenced. Instead, the specific editions of the referenced standards and specifications are listed in Mandatory Appendix I.
1.3 Quality Systems
Nonmandatory requirements relating to the fitting manufacturer’s quality system programs are described in Nonmandatory Appendix A.
1.4 ReLevant Units
This Standard states values in both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard.
11 AIR-PRESSURE TEST
Assembled unions selected in accordance with section 12 shall be tested with air at a minimum pressure of 2.8 bar (40 psi).
12 SAMPLING FOR AIR-PRESSURE TEST
A random sample of unions representative of the production lot shall be submitted for testing in accordance with section 11. The average outgoing quality level (AOQL), as defined in ANSI/ASQ Z1.4, of the established acceptable sampling plans used shall not exceed 2%. A lot, for purposes of this Standard, is defined as the number of unions of the same size, design, and pressure rating submitted for testing at any one time.
13 COATINGS
13.1 MaLLeable Iron Unions
When malleable iron unions are zinc coated, they shall be hot dipped in accordance with ASTM A153/A153M or have an electrodeposited zinc coating conforming to ASTM 8633, Type 1, Service Condition 4. Hot-dipped coatings shall be a minimum thickness of 86 m (0.0034 in.) and applied prior to threading. Electrodeposlted zinc shall be a minimum thickness of 25 pm (0.00 1 in.) and may be applied either before or after threading.
13.2 SteeL Unions
NPS unions made from steel bar, per para. 6(b), may be either uncoated or have an electrodeposited zinc coating conforming to ASTM 8633, Type 1, Service Condition 4. The electrodeposited zinc coatings may be applied either before or after threading.
13.3 Union Seating Surfaces
Union seating surfaces shall not be coated.
13.4 Other Coatings
Other coatings, specified by the purchaser, shall be furnished meeting the agreed requirements. Copper or copper-alloy seats shall not have a zinc coating.
14 DIMENSIONS
Dimensions are given in Tables 14-1 through 14-3.
The following is a list of publications referenced in this Standard. Unless otherwise stated, the latest edition of ASME publications shall apply. Materials manufactured to other editions of the referenced ASTM standards may be used to manufacture fittings meeting the require. ments of this Standard as long as the fitting manufacturer verifies the material meets the requirements of the referenced edition.