SUBSECTION B

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Mr. “t” the nominal thickness UW-40(f) 1. it is the greatest weld thickness in any vessel or vessel part which has not previously been postweld heat treated. 2. Same thickness, using a full penetration butt weld, the nominal thickness is the total depth of the weld exclusive of any permitted weld reinforcement. 3. For groove welds, the nominal thickness is the depth of the groove. 4. fillet welds, the nominal thickness is the throat dimension. 5. If a fillet weld is used in conjunction with a groove weld, the nominal thickness is the depth of the groove or the fillet throat dimension, whichever is greater. Fion Zhang/ Charlie Chong UW-40
fillet welds, the nominal thickness is the throat dimension Fion Zhang/ Charlie Chong UW-40
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SUBSECTION B REQUIREMENTS PERTAININ
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PART UW Overview Fion Zhang/ Charli
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Type number Joint description Limit
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UW-2 SERVICE RESTRICTIONS. Fion Zha
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UW-2 SERVICE RESTRICTIONS Class a b
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UW-2 Class a Description. Vessels a
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WELDED JOINT CATEGORY ASME VIII pre
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• Cat “A” includes all longit
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Non-hemispherical head Critical Cir
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• Cat B includes most circumferen
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• Cat D includes welded joints co
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The main content relates to two are
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(d) Except when the longitudinal jo
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staggered or separated by a distanc
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Based on the ASME Code requirement
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Fion Zhang/ Charlie Chong UW-11
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Item 3: All butt welds in an unfire
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RT Item Note Joint Efficiency (Type
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UCS-57 RADIOGRAPHIC EXAMINATION In
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UW-11(a2) all butt welds in vessels
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UW-11 RADIOGRAPHIC AND ULTRASONIC E
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UW-11(a) Full Radiography (1) all b
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Except as required by UHT-57(a), Ca
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Any vessel with welded joint exceed
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in which case: (a)Category A and B
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(7) ultrasonic examination in accor
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Full Radiography means UW-11 (a-5):
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Radiographic examination is not req
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UW-11(d,e,f) Special welding proces
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http://www.mechanicalengine eringbl
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Fion Zhang/ Charlie Chong UW-11
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UW-12 JOINT EFFICIENCIES Fion Zhang
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Summary of weld types: Type 1: Full
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Summary Maximum Weld Joint Efficien
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Butt joints as attained by double-w
Page 75 and 76: TABLE UW-12 MAXIMUM ALLOWABLE JOINT
Page 77 and 78: Weld type number 1: Single “V”
Page 79 and 80: Type number Joint description Limit
Page 85 and 86: GENERAL NOTES: (a) The single facto
Page 87 and 88: UW12(d) Seamless vessel sections or
Page 89 and 90: UW12(d) • all Category A welds ar
Page 91 and 92: Q. Given a seamless head or shell s
Page 93 and 94: Hemispherical head • 100% RT UW-5
Page 95 and 96: Fion Zhang/ Charlie Chong UW-12
Page 103 and 104: FIG. UW-16.1 SOME ACCEPTABLE TYPES
Page 105 and 106: t c = not less than the smaller of
Page 107 and 108: Exercise: Problem: A nozzle is bein
Page 109 and 110: FIG. UW-16.1 SOME ACCEPTABLE TYPES
Page 115 and 116: • t = nominal thickness of vessel
Page 117 and 118: where it meets a set-on nozzle, by
Page 119 and 120: Q3. ASME VIII section UW-16 (c) fig
Page 121 and 122: Q5. ASME VIII section UW-16 (d)(1)
Page 123 and 124: UW-40(f ) The term nominal thicknes
Page 125: UW-40(a), the soak band shall conta
Page 129 and 130: The nominal thickness 6. When a wel
Page 131 and 132: Mr. “t” the nominal thickness (
Page 133 and 134: Mr. “t” the nominal thickness e
Page 135 and 136: UW-50 NONDESTRUCTIVE EXAMINATION OF
Page 137 and 138: UW-51 RADIOGRAPHIC EXAMINATION OF W
Page 139 and 140: 10-13 RECORDS RETENTION a) The Manu
Page 141 and 142: (c) For manufacturers of UM stamped
Page 143 and 144: When do you need full RT Fion Zhang
Page 145 and 146: UW-11, a(2). All materials; welded
Page 147 and 148: UW-11 (a3) all butt welds in the sh
Page 149 and 150: UW-11 (a6) all butt welds joined by
Page 151 and 152: UW-51 (a2) A written radiographic e
Page 153 and 154: Demonstration of (1) density and (2
Page 155 and 156: Demonstration of (1) density and (2
Page 157 and 158: • Repaired welding, at the option
Page 159 and 160: Unacceptable imperfections UW-51 (b
Page 165 and 166: UW-51 (b3) any group of aligned ind
Page 169 and 170: UW-51 (b2) http://www.ndted.org/Edu
Page 171 and 172: In-progress RT for quality improvem
Page 173 and 174: This rule also addresses smaller, o
Page 175 and 176: UW-52 (b2) For each increment of we
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Welder-C Welder-B Welder-A Under co
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UW-52 (b3) Each spot examination sh
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UW-52 (b4) Radiographs required at
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UW-52 (b4) Radiographs required at
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UW-52 (c) Standards for Spot Radiog
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Spot radiographs may be retained or
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UW-51 (b2) t = the thickness of the
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UW-52(d) Evaluation and Retests UW-
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UW-52(d) Evaluation and Retests (1)
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Fion Zhang/ Charlie Chong
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SUBSECTION B

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