MSS SP-75 High-Strength, Wrought, Butt-Welding Fittings

This Standard Practice covers factory-made, seamless and electric welded carbon and low-alloy steel, butt-welding fittings for use in high pressure gas and oil transmission and distribution systems; including pipelines, compressor stations, metering and regulating stations, and mains.

This Standard Practice governs dimensions, tolerances, ratings, testing, materials, chemical and tensile properties, heat treatment, notch toughness properties, manufacture, inspection, certification, and marking for high-strength, butt-welding fittings NPS 60 and smaller.

With respect to minimum yield strength, MSS SP-75 pipe fittings can be further classified into 7 classes: WPHY-42, WPHY-46, WPHY-52, WPHY-56, WPHY-60, WPHY-65 and WPHY-70.

WP is the abbreviation for "wrought pipe" or "wrought plate" while HY stands for "high yield".

These WPHY pipe fittings can be supplied as long radius elbows, 3R elbows, straight tees, reducing tees, caps and reducers. They are typically used to connect to API 5L pipes or ASTM A694 forged pipe flanges.

MSS SP-75 Grade WPHY 60, 65, and 70 are used a lot in the high pressure oil and gas pipeline fittings, for WPHY-42, 46, 52 and 56, they are working in a medium-high pressure pipelines, so mostly client may choose with ASTM A234 WPB or WPC instead.

Chemical Composition MSS SP-75 Fittings

ElementsValue, %
Carbon (C)≤0.30
Manganese (Mn)≤1.60
Phosphorus (P)≤0.035
Sulfur (S)≤0.035
Copper (Cu)≤0.50
Nickel (Ni)≤0.50
Silicon (Si)≤0.50
Chromium (Cr)≤0.25
Molybdenum (Mo)≤0.13
Vanadium (V)≤0.13
Columbium (Cb)≤0.10
Titanium(Ti)≤0.05

 

Mechanical Properties MSS SP-75 Fittings

MSS SP 75 ClassYield StrengthTensile StrengthElongation
Min. psiMin. psimin. %
WPHY-42420006000025
WPHY-46460006300025
WPHY-52520006600025
WPHY-56560007100020
WPHY-60600007500020
WPHY-65650007700020
WPHY-70700008200018

Dimensions and weight of elbow MSS SP 75 2019

All dimensions are in "mm" unless noted otherwise.

All weights are in "kg".a

Reducer dimensions are as per ASME B16.9

you may also check non standard sizes pipe fitting weight online calculation, pipe fitting surface area online calculation,pipe fitting surface volume online calculation from our pipeline tool link:

https://alloypipefitting.com/fitting-calculator.html

The whole weight and dimension list of pipe fitting directory

https://alloypipefitting.com/fitting-dimension-and-weight.html

Download the PDF file: MSS SP75 2019 dimension and weight.pdf

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NPS
D
DN
D
OD
D
OD
D1
Center to End
Run
C
Outlet
M
16 x 6400 x 150406.4168.3305264
16 x 8400 x 200406.4219.1305273
16 x 10400 x 250406.4273305283
16 x 12400 x 300406.4323.8305295
16 x 14400 x 350406.4355.6305305
18 x 8450 x 200457219.1343298
18 x 10450 x 250457273343308
18 x 12450 x 300457323.8343321
18 x 14450 x 350457355.6343330
18 x 16450 x 400457406.4343330
20 x 8500 x 200508219.1381324
20 x 10500 x 250508273381333
20 x 12500 x 300508323.8381346
20 x 14500 x 350508355.6381356
20 x 16500 x 400508406.4381356
20 x 18500 x 450508457381368
22 x 10550 x 250559273419359
22 x 12550 x 300559323.8419371
22 x 14550 x 350559355.6419381
22 x 16550 x 400559406.4419381
22 x 18550 x 450559457419394
22 x 20550 x 500559508419406
24 x 10600 x 250610273432384
24 x 12600 x 300610323.8432397
24 x 14600 x 350610355.6432406
24 x 16600 x 400610406.4432406
24 x 18600 x 450610457432419
24 x 20600 x 500610508432432
24 x 22600 x 550610559432432
26 x 12650 x 300660323.8495422
26 x 14650 x 350660355.6495432
26 x 16650 x 400660406.4495432
26 x 18650 x 450660457495444
26 x 20650 x 500660508495457
26 x 22650 x 550660559495470
26 x 24650 x 600660610495483
28 x 12700 x 300711323.8521448
28 x 14700 x 350711355.6521457
28 x 16700 x 400711406.4521457
28 x 18700 x 450711457521470
28 x 20700 x 500711508521483
28 x 22700 x 550711559521495
28 x 24700 x 600711610521508
28 x 26700 x 650711660521521
30 x 10750 x 250762273559460
30 x 12750 x 300762323.8559473
30 x 14750 x 350762355.6559483
30 x 16750 x 400762406.4559483
30 x 18750 x 450762457559495
30 x 20750 x 500762508559508
30 x 22750 x 550762559559521
30 x 24750 x 600762610559533
30 x 26750 x 650762660559546
30 x 28750 x 700762711559546
32 x 14800 x 350813355.6597508
32 x 16800 x 400813406.4597508
32 x 18800 x 450813457597521
32 x 20800 x 500813508597533
32 x 22800 x 550813559597546
32 x 24800 x 600813610597559
32 x 26800 x 650813660597572
32 x 28800 x 700813711597572
32 x 30800 x 750813762597584
34 x 16850 x 400864406.4635533
34 x 18850 x 450864457635546
34 x 20850 x 500864508635559
34 x 22850 x 550864559635572
34 x 24850 x 600864610635584
34 x 26850 x 650864660635597
34 x 28850 x 700864711635597
34 x 30850 x 750864762635610
34 x 32850 x 800864813635622
36 x 16900 x 400914406.4673559
36 x 18900 x 450914457673572
36 x 20900 x 500914508673584
36 x 22900 x 550914559673597
36 x 24900 x 600914610673610
36 x 26900 x 650914660673622
36 x 28900 x 700914711673622
36 x 30900 x 750914762673635
36 x 32900 x 800914813673648
36 x 34900 x 850914864673660
38 x 18950 x 450965457711597
38 x 20950 x 500965508711610
38 x 22950 x 550965559711622
38 x 24950 x 600965610711635
38 x 26950 x 650965660711648
38 x 28950 x 700965711711648
38 x 30950 x 750965762711673
38 x 32950 x 800965813711686
38 x 34950 x 850965864711698
38 x 36950 x 900965914711711
40 x 181000 x 4501016457749622
40 x 201000 x 5001016508749635
40 x 221000 x 5501016559749648
40 x 241000 x 6001016610749660
40 x 261000 x 6501016660749673
40 x 281000 x 7001016711749673
40 x 301000 x 7501016762749698
40 x 321000 x 8001016813749711
40 x 341000 x 8501016864749724
40 x 361000 x 9001016914749737
40 x 381000 x 9501016965749749
42 x 161050 x 4001067406.4762635
42 x 181050 x 4501067457762648
42 x 201050 x 5001067508762660
42 x 221050 x 5501067559762660
42 x 241050 x 6001067610762660
42 x 261050 x 6501067660762698
42 x 281050 x 7001067711762698
42 x 301050 x 7501067762762711
42 x 321050 x 8001067813762711
42 x 341050 x 8501067864762711
42 x 361050 x 9001067914762711
42 x 381050 x 9501067968762711
42 x 401050 x 100010671016762711
44 x 201100 x 5001118508813686
44 x 221100 x 5501118559813686
44 x 241100 x 6001118610813698
44 x 261100 x 6501118660813698
44 x 281100 x 7001118711813698
44 x 301100 x 7501118762813711
44 x 321100 x 8001118813813711
44 x 341100 x 9001118864813724
44 x 361100 x 9501118914813724
44 x 381100 x 9501118965813737
44 x 401100 x 100011181016813749
44 x 421100 x 105011181067813762
46 x 221150 x 5501168559851724
46 x 241150 x 6001168610851724
46 x 261150 x 6501168660851737
46 x 281150 x 7001168711851737
46 x 301150 x 7501168762851737
46 x 321150 x 8001168813851749
46 x 341150 x 8501168864851749
46 x 361150 x 9001168914851762
46 x 381150 x 9501168965851762
46 x 401150 x 100011681016851775
46 x 421150 x 105011681067851787
46 x 441150 x 110011681118851800
48 x 161200 x 4001219406.4889737
48 x 181200 x 4501219457889737
48 x 201200 x 5001219508889737
48 x 221200 x 5501219559889737
48 x 241200 x 6001219610889737
48 x 261200 x 6501219660889762
48 x 281200 x 7001219711889762
48 x 301200 x 7501219762889762
48 x 321200 x 8001219813889787
48 x 341200 x 8501219864889787
48 x 361200 x 9001219914889787
48 x 381200 x 9501219965889813
48 x 401200 x 100012191016889813
48 x 421200 x 105012191067889813
48 x 441200 x 110012191118889838
48 x 461200 x 115012191168889838
50 x 201250 x 5001270508934762
50 x 241250 x 6001270610934762
50 x 301250 x 7501270762934800
50 x 361250 x 9001270914934826
50 x 421250 x 105012701067934838
50 x 481250 x 120012701219934876
52 x 241300 x 6001321610978794
52 x 301300 x 7501321762978832
52 x 361300 x 9001321914978864
52 x 421300 x 105013211067978876
52 x 481300 x 120013211219978908
52 x 501300 x 125013211270978908
54 x 241350 x 60013726101016797
54 x 301350 x 75013727621016864
54 x 361350 x 90013729141016889
54 x 421350 x 1050137210671016905
54 x 481350 x 1200137212191016946
54 x 521350 x 1300137213211016946
56 x 241400 x 60014226101054857
56 x 301400 x 75014227621054857
56 x 361400 x 90014229141054902
56 x 421400 x 1050142210671054927
56 x 481400 x 1200142212191054940
56 x 541400 x 1350142213721054978
58 x 301450 x 75014737621092889
58 x 361450 x 90014739141092927
58 x 421450 x 1050147310671092953
58 x 481450 x 1200147312191092978
58 x 541450 x 13501473137210921016
58 x 561450 x 14001473142210921016
60 x 301500 x 75015247621118914
60 x 361500 x 90015249141118965
60 x 421500 x 1050152410671118991
60 x 481500 x 12001524121911181016
60 x 541500 x 13501524137211181029
60 x 581500 x 14501524147311181054
  • Dimensions are in millimeters unless otherwise indicated
  • Wall thickness (t) must be specified by customer
NPS
D
DN
D
OD
D
Center to End
Run
C
Outlet
M
16400406.4305305
18450457343343
20500508381381
22550559419419
24600610432432
26650660495495
28700711521521
30750762559559
32800813597597
34850864635635
36900914673673
38950965711711
4010001016749749
4210501067762711
4411001118813762
4611501168851800
4812001219889838
5012501270934876
5213001321978908
54135013721016946
56140014221054978
581450147310921016
601500152411181054
  • Dimensions are in millimeters unless otherwise indicated
  • Wall thickness (t) must be specified by customer

Dimensional Tolerances MSS SP-75

NPSInside Diameter at EndOut of Roundness
At Ends of FittingsThroughout body of Elbows
ElbowsOther
16-24±2.294.833.052.5%
26-36±2.29*A3.052.5%
38-48±3.05*A3.052.5%
50-60±6.35*A3.052.5%

*A Out-Of-Roundness Tolerances At Ends Shall Be 1% Of Diameter For NPS26 And Larger

NPS90°-45°
Elbows LR
Cte
Tees
Cte
Reducers
Length
Caps
Length
16-24±2.29±2.29±2.29±6.35
26-36±3.05±3.05±4.83±9.65
38-48±4.83±4.83±9.65±9.65
50-60±6.35±6.35±9.65±9.65

Cte = Center To End Dimension

NPSAngularity off Angle QElbows Off Plane PEccentric and Concentric Reducers Off Plane *B
16-242.296.352.5%
26-362.2912.702.5%
38-483.0519.052.5%
50-604.8019.052.5%

*B Values That Are Percent Of O.D.

Dimensional Tolerances Are In Millimeters Unless Otherwise Indicated