ASME RTP-1-2005 pdf download

ASME RTP-1-2005 pdf download.Reinforced Thermoset Plastic Corrosion Resistant Equipment.
1-100 INTRODUCTION Part 1 of this Standard defines the requirements that are applicable to all reinforced thermoset plastic corro- sion resistant vessels fabricated to this Standard and shall be used in conjunction with the specific require- ments in other parts and mandatory appendices of this Standard. 1-110 Scope (a) This Standard applies to stationary vessels used for the storage, accumulation, or processing of corrosive or other substances at pressures not exceeding 15 psig external and/or 15 psig internal above any hydro- static head. (b) In relation to the geometry of vessels, the scope of this Standard shall include the following: (1) where external piping is to be connected to the vessel (a) the first threaded joint for screwed connec- tions (b) the face of the first flange for bolted connec- tions (c) the vessel side sealing surface for proprietary connections or fittings (2) the vessel attachment joint when an attachment is made to either the external or internal surface of the vessel (3) covers for vessel openings, suchas manhole and handhole covers (4) the vessel side sealing surface for proprietary fittings attached to vessels for which rules are not pro- vided by this Standard, such as gages and instruments 1-120 Exclusions The following types of reinforced thermoset plastic equipment are excluded from the rules of this Standard: (a) vessels with internal operating pressure in excess of 15 psig (b) hoods, ducts, and stacks (c) fans and blowers (d) vessel internals such as entrainment separators, chevron blades, packing support plates, and liquid dis- tribution plates (e) pumps (f) pipe or piping (see ASME B31.3) (g) fully buried underground closed vessels 2 1-130 Application Limitations Vessels specified, designed, fabricated, and certified by the Fabricator as conforming to this Standard shall be limited to the following pressure and temperature limits: (a) Maximum Internal Pressure 1 (1) With Proof Test of As-Constructed Laminate. The internal operating pressure, measured at the top of the vessel, shall not be greater than 15 psig. (2) WithoutProofTestofAs-ConstructedLaminate. The internal operating pressure, measured at the top of the vessel, shall not be greater than 2 psig. (b) Maximum External Pressure 1 (1) With Proof Test of As-Constructed Laminate. The limit on external operating pressure is 15 psig. (2) WithoutProofTestofAs-ConstructedLaminate. The limit on external operating pressure is 2 psig. 1-220 Critical Service Requirements (a) When a User or User’s Agent has declared in the UBRS that a vessel is to be used in critical service, the following shall apply: (1) Regardless of operating or design pressure, all vessels declared to be in critical service must be sub- jected to a Proof Test of the as-constructed laminate. Refer to para. 6-930(d). (2) The vessel shall be specified, fabricated, and inspected to be in full compliance with Level 1, Critically Corrosion Resistant, visual inspection criteria as described in Table 6-1. (3) Design factors ofsafety for the physical strength properties of the laminate shall be at least 125% of those specified elsewhere in this Standard. Greater design fac- tors may be warranted based on analysis of the expected operating conditions and such factors as are outlined in para. 1-210(d). If so, they shall be specified by the User or User’s Agent. (4) Acoustic emission testing of RTP vessels has been found useful in identifying major defects. Its use as an additional verification of integrity for vessels to be used in critical service is optional. (5) Postcure of critical service vessels is optional butshould be given consideration. Postcure ofRTP lami- nates is known to improve certain mechanical properties of the laminate and reduce residual styrene content, and may improve the corrosion resistance of the laminate. Other mechanical properties, such as elongation, may be reduced by postcure. Consultations with the resin manufacturer and Fabri- cator should be conducted, and where postcure is to be employed, a specificationdefiningprocedures, methods, and a time–temperature program shall be specified by the User. (b) Compared to steel, RTP materials have the follow- ing characteristics: (1) the long-term effects of chemical and thermal degradation on mechanical properties are less well defined (2) flammability (3) limited impact resistance (4) low ductility that could lead to abrupt rupture due to excess loading (5) the long-term effects of creep are less well defined (c) On the basis of (b) above, the following additional safeguards should be carefully considered: (1) location of vessels (2) guarding against physical damage and abuse