4050DEUTSCHE NORM August 1999
德国标准1999年八月
Lenticular ring joint gaskets for flanged joints
Flangchverbindungen mit Dichtlin
In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been ud throughout as the decimal marker.
为了与国际标准组织现行标准一致，逗号被用于作为十进制的标记。
Foreword 前言
This standard has been prepared by Technical Committee …………… (Pipes and Pipe Joints Standards Committee)
Amendments 改进
This standard differs from the April 1972 edition as follows: 该标准不同于1972年4月版本的地方如下：
a)The standard now only covers nominal sizes up to DN 200 该标准仅涉及最多到DN200的公称尺寸
b)For each PN designation (except for PN 400), two dimension ries per nominal size have been specified. 对于每个PN
名称（PN400 除外），每个公称尺寸的两种尺度系列都已经进行详细说明
c)Technical delivery conditions have been specified. 技术上的交货条件已经进行详细说明
d)Appendices A and B have been included. 包括附件A和B
Previous edition 前版
DIN 2696: 1972-04
All dimensions are in millimeters 所有尺寸用毫米表示
1.Scope 范围
This standard applies to lenticular ring joint gaskets for flanged joints in piping systems operating at pressures exceeding 63 bar. It specifies dimensions and the design of DN 10 to DN 200 gaskets rate
d for pressures from 63 bar to 400 bar. 该标准应用于操作压力超过63帕的管道系统中的法兰接头的双凸面环接透镜垫。它详细说明了在额定压力63帕到400帕下的DN 10 到DN 200 的透镜垫的尺寸和规格。
2.Normative references 标准化参考资料
This standard incorporates, by dated or undated reference, provisions from other publications. The normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subquent amendments to or revisions of any of the publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. 本标准包含了其他出版物的有日期或无日期的参考文献和规定。这些标准参考文献列于文中适当的地
方，其下列出了出版物的名称。对有日期的文献，除非特别注明，该标准最后一次的修正或修订不适用。对于无日期的文献，引用的是最新的修订版
DIN 2627 PN 400 welding neck flanges 对焊法兰DIN 2627 PN 400
DIN 2628 PN 250 welding neck flanges 对焊法兰DIN 2628 PN 250
draw的英文
DIN 2696: 1999-DB
DIN 2629 PN 320 welding neck flanges
DIN 2636 PN 64 welding neck flanges
DIN 2637 PN 100 welding neck flanges
DIN 2638 PN 160 welding neck flanges虾籽能吃吗
DIN EN 1092-1 Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges) 用于管道，阀，配件和附件的圆法兰盘DIN EN 1092-1，PN 指–第一部分：不锈钢法兰
DIN EN 1591 Flanges and their joints – Design rules for gasketed circular flange connections
法兰以及接头DIN EN 1591 ——对接口密封的圆法兰盘连接设计规则
DIN EN 10088-1 Stainless steels – Part 1: List of stainless steels
不锈钢DIN EN 10088-1 ——第一部分：不锈钢列表
DIN EN 10204 Inspection documents for metallic products (includes Amendment A1: 1995)
金属产品的检验文件DIN EN 10204 （包括1995年的修正A1）
DIN EN 10222-2 Steel forgings for pressures purpos – Part 2: Ferritic and martensitic steels with specified elevated temperature properties (includes Corrigendum AC: 2000)
承压钢锻件.第二部分：具备特定高温性能的铁素体和马氏体钢EN10222 (包括技术勘误AC:2000)
AD-Merkblatt (AD Code of practice) B7 Schrauben (Screws and bolts螺丝和螺栓)
AD-Merkblatt (AD Code of practice) B8 Flansche (Flanges 法兰)
（以上两条都是AD标准）
3.Concepts and symbols 概念和符号
3.1Concepts 概念
3.1.1Lenticular ring joint gasket 透镜的圆形垫
Lens-shaped aling element for u in flanged joints 用于法兰接头的透镜型密封件
女生坚强到心疼的句子3.1.2Flanged joint asmbly 法兰接头装配
Joint asmbly consisting of two flanges, tightening bolts and a gasket.
接头由法兰，拉紧螺栓和透镜垫装配而成
3.1.3Gasket width 透镜垫宽度
Effective width resulting from the plastic deformation of the gasket’s contact faces that occurs during
asmbly; designated by b D (cf. detail X in figure 1)
有效的宽度是由于装配过程中透镜垫接触面的塑料形变产生的；由b D来表示（cf. X详细信息见表1）For gaskets made of iron, b D is given by equation (1):
对于铁制的透镜垫，b D由以下公式算出（1）：
where 在公式里
F DN (equal to F口/ sin 70) is the normal component of the gasket force,
F DN (等于F口/ sin 70) 表示透镜垫强度的常规分量
金牛座和射手座配吗r is the radius, in mm;
r 表示半径，单位是毫米
R is the tensile strength of the gasket material;
R表示透镜垫材质的抗张强度
NOTE: DIN EN 1591 enables the gasket width to be determined both approximately and exactly on the
basis of the maximum permissible compressive stress, Q max rather than the tensile strength of the gasket material, R m.
*注解：DIN EN 1591 使透镜垫宽度能计算出以最大应用压力为基础的大概值和精确值Q max，而不是透镜垫材质的抗张强度R m
In the ca of gas piping systems, AD-Merkblatter B7 and B8 specify a gasket design bad on an a
直省ssumed constant width, k0, of 2mm or, k1, of 6mm [2],[3]. Since the results obtained in such calculations may
deviate considerable from the actual dimensions, it is recommended that equation (1) be ud for flange design calculations. Becau the force F DN is itlf a function of the gasket width, b D, this value can only be determined iteratively.
在煤气管道系统里，AD-Merkblatter B7 和B8 规定基于一个假定宽度常数k0, of 2mm or, k1, of 6mm
[2],[3] 的透镜垫设计。因为这样导致在计算中的值可能大范围的偏离实际尺寸，所以建议用公式
（1）来计算法兰的设计值。由于强度F DN是透镜垫宽度b D本身的一个函数，所以这个值只能通过迭代方法计算。（迭代为数学专用名词）
3.1.4Gasket diameter 透镜垫的直径
Diameter lying approximately halfway between diameters d1 and d5, as given by equation (2):
公式（2）给出的直径大约是d1与d5和的一半
d D = (d1 + d5 )/2
Designated by d D (cf. Appendix A) 命名为d D
______________
1) Currently at draft stage.
目前在起草阶段
2) Obtainable from Beuth Verlag GmbH, 10772 Berlin, Germany.
能从Beuth Verlag GmbH, 10772 Berlin, Germany 里得到
3.2Symbols, quantities and units 符号，数量和单位
Table 1: Symbols, quantities and units 符号，数量和单位
Symbol 符号Quantity 数量
d j Insid
e diameter o
可乐鸭翅的做法
f flange or flange facing, in mm 法兰内径，单位：毫米
d D Gasket diameter, in mm 透镜垫直径，单位：毫米
d1 Inside diameter of gasket, in mm 透镜垫内径，单位：毫米
d2 Outside diameter of gasket, in mm 透镜垫外径，单位：毫米
d5 Outside diameter of flange or flange facing, in mm 法兰外径，单位：毫米
h11) Gasket height at d j, in mm 透镜垫内径高度，单位：毫米
hD Gasket height at d D, in mm 透镜垫直径高度，单位：毫米
h21) Gasket height at d2, in mm 透镜垫外径高度，单位：毫米
x Distance between raid faces, in mm 法兰凸面的距离，单位：毫米
bD Gasket width, in mm 透镜垫宽度，单位：毫米
r Radius, in mm 半径，单位：毫米
Rm Tensile strength, in N/mm2 抗张强度，单位牛/平方毫米
FD Gasket force, in N 透镜垫力度，单位：牛
FDN Normal component of gasket force, in N 常态下的透镜垫力度，单位：牛
FDR Radial component of gasket force, in N 放射性条件下的透镜垫力度，单位：牛
1) Reductions in height due to rounded edges or chamfers may be ignored.
高度的减少是由于圆形边缘或者斜面可能被忽略。
4.Designation 名称
毫不可惜
Designation of a DN 50 lenticular ring joint gasket of dimension ries 1 for a PN 160 flange, made of grade P245GH steel: Gasket DIN 2696 – Series 1 – DN 50 – PN 160 – P245GH
一个尺寸系列1 的DN 50 透镜的环接垫圈对应于一个PN 160法兰，sP245GH钢的等级的名称构成是：Gasket DIN 2696 – Series 1 – DN 50 – PN 160 – P245GH
5.Requirements 需求
5.1 Design of facings 切面的设计
Gaskets shall be ud with weld-neck flanges of the same nominal pressure rating as the gasket and complying with DIN EN 1092 – 1, DIN 2627, DIN 2628, DIN 2629 or DIN 2638, u of other flanges of equivalent design being permitted.
透镜垫将按照DIN EN 1092 – 1, DIN 2627, DIN 2628, DIN 2629 or DIN 2638，被应用于与透镜垫同样等级压力的法兰焊接部分，也可用于其他类似法兰的设计。
Flange facings shall be tapered so that they form an included angle of 140o when flanges are asmbled.
法兰的边缘应该是锥形的，这样就能形成一个焊接140°的坡口角度用于安装法兰。
The gasket facings shall be spherical. See Explanatory notes for other designs.
透镜垫的边缘应该是球形的。其他设计参考注解
The surface roughness param eter R2 of facings shall be 6.3μm in the radial direction. Surfaces shall be free of cracks and scratches.
在径向边缘表面的起伏（粗糙度）参数R2 应该为6.3μm。表面应该无裂纹和抓痕。
5.2 Dimensions 尺寸
The dimensions of gaskets shall be as specified in figure 1 and tables 2 to 12
将在图表1和表格2到12里详细说明透镜垫的尺寸。
5.3Materials.
Table 13 lists typical materials ud for gaskets.
表13列的是典型的用于透镜垫的原料。
Table 13：Gasket materials1）透镜垫原料
Designation 名称Material number材料号码As in
P245GH EN 10222-2
X6cRnImOtI17-12-2 1.4571 DIN EN 10088-1
x6cRnItI18-10 1.4541 DIN EN 10088-1
1)U of other materials is subject to agreement 其他原材料按照协议规定
NOTE：To obtain a greater deformability of gasket facings, gasket material should have a hardness value lower than that of the flange material. This cannot be ensured when gaskets and flanges are made from the same material, but experience has shown that even in this ca the plastic deformation of the gasket is considerably greater than that of the facing.
为了得到更大可变度的透镜垫切面，透镜垫材质的硬度值应该比法兰材质小。如果法兰和透镜垫用同样的材质，就不能确保能得到更大可变度的透镜垫表面，但是根据以往经验即使这种情况下，透镜垫的塑性可变度比透镜垫切面的塑性可变性更大。
狮口逃生5.4 As – delivered condition 交货条件
