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Identifying Threads, Sealing Methods and Industrial Fittings.

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Presentation on theme: "Identifying Threads, Sealing Methods and Industrial Fittings."— Presentation transcript:

1 Identifying Threads, Sealing Methods and Industrial Fittings

2 Module Objectives zExplain the basic thread characteristics necessary to identify threads

3 Module Objectives zExplain the basic thread characteristics necessary to identify threads zDifferentiate between and identify various types of threads used on industrial fittings

4 Module Objectives zExplain the basic thread characteristics necessary to identify threads zDifferentiate between and identify various types of threads used on industrial fittings zExplain the various sealing methods used for the different fittings

5 Module Objectives zExplain the basic thread characteristics necessary to identify threads zDifferentiate between and identify various types of threads used on industrial fittings zExplain the various sealing methods used for the different fittings zIdentify different types of fittings being used in the industrial market place

6 Thread Characteristics

7 zThread pitch is the distance between a single thread Pitch

8 Thread Characteristics Pitch: zPitch is sometimes written as the number of threads within one inch distance ze.g. 8 threads per inch

9 Thread Characteristics Flank Angle and Taper Angle:

10 Thread Characteristics Crest and Root: Root Crest

11 Thread Characteristics Major Diameter or OD:

12 Thread Style and Function

13 Thread Styles Port End Threads : z Parallel Parallel

14 Parallel Threads: Thread Functions zParallel threads only serve the function of holding in the fitting zSealing is achieved by some other means, such as with an O-ring

15 Thread Styles zTapered Port End Threads: Tapered

16 Thread Function zTapered threads serve two functions: zFor holding in the fitting zSealing (even though sealing is usually assisted with additional sealant) Tapered Threads:

17 Thread ID Tools

18 zMIK-1 kit zPort Boards zKnown Threads zMarkings and Tables

19 Thread ID Tools MIK-1 kit yCaliper yThread gages yThread profiles yInstruction booklet yNose angle indicator

20 Thread ID Tools MIK-1 kit yCaliper xUsed to measure outside and inside diameter in either inch or metric units

21 Thread ID Tools MIK-1 kit yThread gages xUsed to compare thread form to determine pitch

22 Thread ID Tools MIK-1 kit yThread profiles xUsed to shadow pipe threads for determining nominal size

23 Thread ID Tools MIK-1 kit yNose angle indicator xUsed to determine whether nose angle or seat is 37° or 45°

24 Thread ID Tools MIK-1 kit yInstruction booklet (4303-B1) xContains specifications for various thread forms

25 Thread ID Tools Port Board yUsed to determine male thread size based on comparison with known threads

26 Thread ID Tools Other Known Threads yTube nuts or other components where threads can be used for comparison

27 Thread ID Tools Markings and Tables yIn some cases, fittings are marked with a cross reference for threads yTables can be used to identify threads based on given characteristics

28 Identifying Threads

29 1a. Verify if parallel or tapered z Visual inspection Steps for Identifying Thread Forms :

30 Identifying Threads 1b. Verify if parallel or tapered z Compare with a known parallel Steps for Identifying Thread Forms :

31 Identifying Threads 2. Determine thread pitch z Use thread gages Steps for Identifying Thread Forms: Bad Fit Good Fit

32 Identifying Threads 3a. Determine size zMeasure with caliper or compare with thread profile Steps for Identifying Thread Forms:

33 Identifying Threads Steps for Identifying Thread Forms 3b. Determine Size zCompare with Profile

34 Identifying Threads 4. Define thread yThreads are called out according to the type of thread yThey usually follow a standard pattern and this is how they may appear on a print Steps for Identifying Thread Forms:

35 Identifying Threads 4. Define thread yNPT/NPTF - American Pipe Thread yExample:1/4-18 NPT y1/4 = nominal size y18 = pitch (threads per inch) yNPT or NPTF usually specified or NPT/NPTF where it does not matter if it is either one Steps for Identifying Thread Forms:

36 Identifying Threads 4. Define thread yUN/UNF - Unified (SAE Straight Thread) yExample:9/16-18 UNF y9/16 = actual size y18 = pitch (threads per inch) yUN or UNF usually specified or UN/UNF where it does not matter yUNF is usually used for thread pitch above 12 TPI Steps for Identifying Thread Forms:

37 Identifying Threads 4. Define thread yBSPT - British Standard Pipe, Tapered yExample:R3/8 yR signifies tapered y3/8 = nominal size yThe pitch is usually assumed based on known standard yJapanese taper thread would be written as PT 3/8 Steps for Identifying Thread Forms:

38 Identifying Threads 4. Define thread yBSPP - British Standard Pipe, Parallel yExample:G3/4 yG signifies parallel y3/4 = nominal size yThe pitch is usually assumed based on known standard yJapanese parallel thread would be written as PF 3/8 Steps for Identifying Thread Forms:

39 Identifying Threads 4. Define thread yMetric Parallel yExample:M22X1.5 yM signifies metric y22 = actual size in mm y1.5 = pitch (distance between threads in mm) Steps for Identifying Thread Forms:

40 Identifying Threads 4. Define thread yMetric Tapered yExample:M10X1 keg (or tapered) yM signifies metric y10 = actual size in mm y1 = pitch (distance between threads in mm) ykeg is the abbreviation for the German word meaning tapered and if the thread is tapered, it will be specified Steps for Identifying Thread Forms:

41 Port End Sealing Methods

42 zFemale Port yO-ring in chamfer xAvailable with UN/UNF (SAE J1926) Metric (ISO 6149) BSPP (JIS B2351)

43 Port End Sealing Methods zO-ring in chamfer (Male end) zMost reliable form of sealing zAvailable in adjustable fittings zISO 6149 has special identification

44 Port End Sealing Methods zFemale Port ySpot face sealing xAvailable with Metric (DIN 3852-1) BSPP (DIN 3852-2) xWide variety of interchangeable male ends

45 Port End Sealing Methods zO-ring in groove yDIN 3852 Type E xO-ring not round in cross section xAdjustable not possible xSecond in pressure holding capacity

46 Port End Sealing Methods zO-ring w/ retaining ring yDIN 3852 Type G & H xSeparate metal ring surrounding o-ring xAdjustable fittings are type H

47 Port End Sealing Methods zBonded Seal yDIN 3852 Type D xElastomer bonded to metal ring xUndercut on fitting has taper angle xAdjustable not possible

48 Port End Sealing Methods zHard metal seal yDIN 3852 xTypically used on Banjo fittings xSeals by coining surface of port xLimited reusability xUseful for extreme temperatures xAdjustable not possible

49 Port End Sealing Methods zSoft Metal Seal yDIN 3852 Type A xSeal material usually copper xAdjustable not possible xUndercut area has taper angle

50 Port End Sealing Methods zCutting Face Seal yDIN 3852 Type B xSharp edge on fitting coins spotface for sealing xLimited reusability xAdjustable not possible xUseful for extreme temperatures

51 Port End Sealing Methods zFemale Port yTaper threads xAvailable with NPT/NPTF (SAE 476) BSPT (DIN 3852-2) Metric taper (DIN 3852-1) xSometimes female port has parallel threads Tapered male into female parallel allowed

52 Port End Sealing Methods zTaper threads ySealing initiated by thread interference yAdditional sealant usually required yProne to fatigue failure yProne to galling

53 Tube/Hose End Sealing Methods

54 Tube End Identification Tube/Hose Ends yO-ring face seal (flat face seal) y37° flare y45° flare y24° flareless yJIS 30° flare and 60° cone yBSI (BSPP) 60° cone yNPSM/NPT

55 Tube End Identification Tube/Hose End yO-ring face seal xSAE J1453 xISO 8434-3 xUN/UNF Thread xHose,Inch or metric tube

56 Tube End Identification Tube/Hose End y37° flare xSAE J514 xISO 8434-2 xUN/UNF Thread xHose, Inch or metric tube

57 Tube End Identification Tube/Hose End y45° flare xSAE J512 xUN/UNF Thread xHose, Inch tube

58 Tube End Identification Tube/Hose End y24° flareless xSAE J514 xUN/UNF Thread xHose, Inch Tube

59 Tube End Identification Tube/Hose End y24° flareless xDIN 2353 xISO 8434-1 xMetric Thread xHose, Metric Tube x3 pressure series

60 Tube End Identification Hose End yJIS Cone xB8363 xBSPP Thread x60° cone xHose connection

61 Tube End Identification Hose End yJIS Flare xB8363 xBSPP Thread x30° flare xHose connection

62 Tube End Identification Hose End yKomatsu Flare xMetric Thread x1.5 mm pitch (all sizes) x30° flare xHose connection

63 Tube End Identification Hose/Port End yBSPP cone xBS B5200 xBSPP thread x60° cone xHose connection

64 Tube End Identification Hose/Port End yNPTF/NPSM xSAE J516 xNPT/NPTF male thread xNPSM female thread x30° chamfer or 60° cone xHose connection

65 Identifying Metric 24° Flareless Fittings

66 zIdentify markings yManufacturer’s logo yMaterial code yTube size yPressure series

67 Identifying Metric 24° Flareless Fittings zDetermine Tube Size yMeasure sleeve ID

68 Identifying Metric 24° Flareless Fittings zDetermine Tube Size yMeasure tube OD

69 Identifying Metric 24° Flareless Fittings zDetermine Tube Size yMeasure fitting throat

70 Identifying Metric 24° Flareless Fittings zDetermine Tube Size yMeasure opening in back of nut

71 Identifying Metric 24° Flareless Fittings zDetermine thread pitch and size

72 zVerify with specification table Identifying Metric 24° Flareless Fittings

73 JIS and BSPP 60° Cone Fittings

74 zDifferences yThread length yChamfer diameter yUndercut area yFunction (dual vs single) yInterchangeability?

75 Hands on Exercise

76 Standards Activity and Industry Trends

77 Standards Activity zMerging of BSI and JIS 60° Cone Adapters zISO 16030 Pneumatic BSPP Port zHigh Pressure Multi-Bolt Round Flanges

78 Industry Trends zMetric Tube (plated) zElastomeric Seal zEO-2 yMachine Tool Builders zISO 6149 yAg Equipment Manufacturers yEngine Manufacturers

79 What’s available From TFD

80 What’s Available from TFD zK4 Adapters zTube Fabricating Equipment zMetric Tube zEO and EO-2 Fittings & Accessories zJIS Fittings zConversion Adapters and Plugs zMetric Triple-lok zMetric Seal-lok zMetric Tube Clamps


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