管口力矩初步算法

公式中的符号”D”表示接管的公称直径，最大不超过 60”。公式中的 b 值取决于接管法兰的磅 级。
Flange Rating 法兰等级
PN2.0 (150 lb) PN5.0 (300 lb) PN11.0 (600 lb) PN15.0 (900 lb) PN26.0 (1500 lb) PN42.0 (2500 lb)
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Yin ZuAI
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2012-12-31
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treatment, Vendor may contact Purchaser to ask for the calculation result of pipe stress analysis. Reduction of nozzle loads according to formula below shall be approved by Purchaser.
内部的压力管道应满足工艺要求，两面都要考虑腐蚀裕量。
Internal non-pressure piping shall be as follows:
内部非压力管道应遵循：
•
Carbon and low alloy steel (4 to 6 percent Cr-Mo maximum): standard weight,
Schedule 40 or ¼ inch (6.4 mm) nominal wall thickness, whichever is less.
•
碳钢和低合金钢（最大 Cr-Mo 含量 4～6％）：标准重量，名义厚度取 SCH40 等级与
¼”（6.4mm）的较小值。
•
High alloy steel (over 4 to 6 percent Cr-Mo) and stainless steel: Schedule 10S or
fabricated from No.12 USS gauge sheet.
•
高合金钢（Cr-Mo 含量大于>4～6％）和不锈钢：壁厚等级 SCH10s 或按照 USS 标准
中表 12 进行制造。
Manholes, Handholes and Inspection Openings 人孔，手孔，检查孔
Unless otherwise specified, the following minimum criteria shall apply:
除非特别说明，应执行以下最低标准：
Vessel Inside Diameter 容器内径
≤ 300 mm
Item 描述 Peephole 观察孔
Size (Min.) 最小公称尺寸
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周向弯曲力矩
Resultant Bending Moment 组合弯曲力矩 Torsional Moment 扭矩 Longitudinal Force 轴向力 Circumferential Force 周向力 Resultant Shear Force 组合剪切力 Axial Tension or Compression Force 轴向拉伸或压缩力
DN 50 (2”)
Qty. (Min.) 最少数量
1
Vessels 容器 0.6 0.7 0.8 1.8 3.0 3.3
‘b’ value b值
Tubular Heat Exchangers 管壳式换热器 0.75 0.75 1.25 3.00 4.00 5.60
Longitudinal Bending Moment 轴向弯曲力矩
Circumferential Bending Moment
PRESSURE VESSELS PER ASME - GENERAL
压力容器通用规定（遵循 ASME）
No.
编号
40-010-00-V-0-00-001
Category
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Specification
规范
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Current
wenku.baidu.com当前
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AST
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分析应执行 WRC107、297 号公告，与 3 倍许用应力（3Sm）进行比较。如有必要，应对接 管和筒体进行加强。
Each process nozzle shall be capable of withstanding the specified moments and forces from external piping under design conditions which are considered to be acting at the intersection of nozzle and shell in the corroded condition.
每个工艺管口在设计工况下都应能承受规定的外部管道施加的力和力矩，这些力和力矩被设定 为在腐蚀工况下作用在筒体与接管的连接处。
The indicator “D” in the formulae is the nominal diameter in inches up to a maximum of 60 inches. The ‘b’ value in the formulae depends upon the rating of the nozzle flange as follows:
(FR) = b x 2.5 x D kN (FA) = b x 2.0 x D kN
The loads can be expected to apply in the positive and negative directions.
受力可以是正负值。
Refer to figure in WRC bulletin No. 107 for sign convention.
当接管承受的力和力矩较大，超出规定值时，应按照数据表上列出的力和力矩对接管进行分 析。
Assessment shall be in accordance with WRC Bulletins 107 and 297 against 3 times the allowable stress (3Sm). The nozzle/shell reinforcement shall be incremented if found necessary.
相关符号规定见 WRC107 号公告。
Internal Piping 内部管道
Internal pressure piping shall be as required by the service, with due allowance for corrosion on both surfaces.
No.
编号
40-010-00-V-0-00-001
Category
类别
Specification
规范
Status
状态
Current
当前
Responsible unit
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AST
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Yin ZuAI
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Nozzle to Shell Loading 壳体接管载荷
(ML) = b x 0.130 x D2 kNm
(M∅) = b x 0.100 x D2 kNm
Nozzle to Head Loading 封头接管载荷
PRESSURE VESSELS PER ASME - GENERAL
压力容器通用规定（遵循 ASME）
(MB) = b x 0.164 x D2 kNm (MT) = b x 0.150 x D2 kNm (FL) = b x 2.0 x D kN (F∅) = b x 1.5 x D kN (FR) = b x 2.5 x D kN (FA) = b x 2.0 x D kN
(MB) = b x 0.164 x D2 kNm (MT) = b x 0.150 x D2 kNm
当设备筒体/封头的厚度由于外部力和力矩的影响需整体增加时（增加补强圈也无法承受接管 荷载）或者厚度的增加影响了制造工艺（如热处理），供货商可以联系买方以获得管道应力分 析的计算结果。降低公式中要求的接管载荷应得到买方批准。
Nozzles subjected to large forces and moments in excess of those specified below, shall be analyzed for forces and moments listed on the Pressure Vessel datasheets.