ASME B16.36:1996 pdf download ORIFICE LANCES
1 SCOPE
1.1 General
This Standard covers flanges (similar to those coveredin ASME B16.5) that have orifice pressure diffentialconnections. Coverage is limited to the following:(a) welding neck fianges Classes 300, 400, 600, 900,1500，and 2500
(b) slip-on and threaded Class 300
1.2 References
1.2.1 Referenced Standards. Standards and spec-ifications adopted by reference in this Standard areshown in Annex B, which is part of this Standard. Itis not considered practical to identify the specific editionof each standard and specification in the individualreferences. Instead, the specific edition reference isidentified in Annex B. A flange manufactured in accord-ance with earlier editions of the referenced standardsand in all other respects conforming to this Standard willbe considered to be in accordance with this Standard.
1.2.2 Codes and Regulations. A fange usedunder the jurisdiction of the ASME Boiler and PressureVessel Code,the ASME Code for Pressure Piping,ora governmental regulation is subject to any limitationof that Code or regulation, This includes any maximumtemperature limitation, or rules governing the use ofa material at low temperature, or provisions for operationat pressure exceeding the pressure-temperature ratingsin this Standard.
1.3 Content
The requirements of this Standard include:
(a) pressure ratings
(6) marking
(c) materials
(d) dimensions
(e) tolerances
1.4 Quality Systems
Non-mandatory requirements relating to the productmanufacturer’s Quality System Program are describedin Annex A
2 PRESSURE-TEMPERATURE RATINGS
The pressure-temperature ratings,including all userecommendations and limitations, and the method ofrating given in ASME B16.5 apply to these flanges.
3 MATERIAL
3.1 General
Flange materials shall meet all requirements of ASMEB16.5.
3.2 Bolting
Material shall be in accordance with ASME B16.5.
3.3 Plugs
Pressure retaining plugs shall conform to ASMEB16.11.unless otherwise agreed between purchaser andmanufacturer. Plug material shall be at least as corrosionresistant as the corresponding flange material.
4 SIZE
Orifice flange sizes are indicated by the nominalpipe size to which they are attached. Only those listedin Tables l through 6 are considered standard.
5 MARKING
Flanges shall be marked as required in ASME B16.5.For welding neck flanges only, the bore diameter shallbe marked.
6 FLANGE FACING FINISH
The finish of contact faces shall conform to therequirements of ASME B16.5.
7 GASKETS FOR RAISED FACE FLANGES
7.1 Gasket Thickness
Flange dimensions are based on the use of 0.06 in.
thick gaskets.!
7.2 Gasket Thickness
If gaskets of differing hardness and compressibilityare used, the rules of Annex E of ASME B16.5 shallgovern.
8 PRESSURE TAPS
8.1 General
Each orifice flange is provided with two pressuretap holes extending radially from the outside diameterof the flange to the inside diameter of the flange.Corner taps may be used on NPS 1 and smaller ifspace permits. See Fig. 1. For ring joint flanges listedin Tables 2 through 6 where radial taps will interferewith the ring groove, angular meter taps, as illustratedin Fig. 3, will be required. Each pressure tap hole shallbe equipped with a pipe plug.
8.2 Location
The 0.94 in. locating dimension for raised face and0.75 in. for ring joint’ shall be measured at the bore.
8.3 Pipe Connection
Unless otherwise specified, pressure tap holes maybe either tapped % NPT or NPS socket connectionin accordance with AME B16.11.
ASME B16.36:1996 pdf download
PS:Thank you for your support!
