ASME B31.9:2017 pdf free download

ASME B31.9:2017 pdf free download.Building Services Piping.
(b) Expansion joint Loads. Use of expansion joints usually Increases reactions at anchors. For corrugated and slip joints, In the absence of manufacturers data. anchor reaction may be cakulated as the sum of
(1) operating pressure times area corresponding to the maximum inside diameter of the joint corrugations
(2) the force required to cause full rated deflection of the joint frictional forces at guides and supports
II the expansion joint is at an elbow or bend, the vector forces due to fluid change in direction must also be included.
9.20.1.3 Other Loads. Loads from other design condi tions described in para 901 shall be considered in design of both supports and restraints. Loads due to shock and vibration should preferably be minimized by the use of suitable dampeners or properly placed supports and restraints,
9.20.2 Test Loads
9.20.2.1 Test Loads on Rigid Supports. Rigid supports shall he capable of bearing the total load under test conditions as well as those of normal operation, unless additional supports are provided during testing.
9.20.2.2 Test Loads on Spring Hangers. Load conditions for calculated operation of spring hangers should not take test loads Into account, The hanger assembly, however, shall be capable of supporting the test load unless additional supports are provided during testing.
9.21 DESIGN OF PIPE-SUPPORT1NG ELEMENTS
9.21.1 GeneraL
Pipe-supporting elements shall be designed to carry the sum ofall concurrently acting loads descflbed in para. 920. Unless designed to anchor or restrain line movements by withstanding the resultant Forces and moments, they shall permit free movement of the piping resulting from thermal expansion or other causes.
In addition, supports shall be so located and spaced as to protect the supported piping from excessive stress and distortion.
9.21.1.1 MateriaLs and Stresses. Except as permitted herein, materials for pipe-supporting elements shall be listed In Mandatory Appendix I. Allowable stresses for pipe-supporting elements shall be one-fourth of the minimum tensile strength shown in Mandatory Appendix I. For carbon steel of unknown specification. the allowable stress shall not exceed 9,500 psi (65.5 MPa).
(a) Threaded Parts The maximum safe loads shall be calculated on tile root area of the threads of threaded parts.
(b) Allowable Overstress. An increase in allowable stress is permitted up to 80% of specified minimum yield strength during hydrostatic testing, not to exceed 24.000 psi (165.5 MPa) [or carbon steel of unknown specification.
(C) Selection of Material Hanger and support materials shall be compatible with the characteristics of the piping materials, so that neither shall adversely affect the other.
921.1.2 Hanger Adjustments. Hangers supporting piping NPS 2’/ (I)N 65) and iarger shall be designed to permit adjustment alter erection while supporting the load. Threaded parts fir adjustment shall be in accor dance with ASME 811.
Turnbuckles and adjusting nuts shall have full thread engagement. Threaded adjustments shall be provided with suitable locking devices.