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

reducer_con_ecc2

reducer_con_ecc2

  • Dimensions are in millimeters unless otherwise indicated
  • Wall thickness (t) must be specified by customer
NPS
D
DN
D
Outside Diameter
at Bevel
End-to-End
H
Large End
D
D1
16 x 14400 x 350406.4355.6356
16 x 12400 x 300406.4323.8356
16 x 10400 x 250406.4273356
16 x 8400 x 200406.4219.1356
18 x 16450 x 400457.2406.4381
18 x 14450 x 350457.2355.6381
18 x 12450 x 300457.2323.8381
18 x 10450 x 250457.2273381
20 x 18500 x 450508457.2508
20 x 16500 x 400508406.4508
20 x 14500 x 350508355.6508
20 x 12500 x 300508323.8508
22 x 20550 x 500558.8508508
22 x 18550 x 450558.8457.2508
22 x 16550 x 400558.8406.4508
22 x 14550 x 350558.8355.6508
24 x 22600 x 550609.6558.8508
24 x 20600 x 500609.6508508
24 x 18600 x 450609.6457.2508
24 x 16600 x 400609.6406.4508
26 x 24650 x 600660610610
26 x 22650 x 550660559610
26 x 20650 x 500660508610
26 x 18650 x 450660457610
28 x 26700 x 650711660610
28 x 24700 x 600711610610
28 x 22700 x 550711559610
28 x 20700 x 500711508610
28 x 18700 x 450711457610
30 x 28750 x 700762711610
30 x 26750 x 650762660610
30 x 24750 x 600762610610
30 x 22750 x 550762559610
30 x 20750 x 500762508610
32 x 30800 x 750813762610
32 x 28800 x 700813711610
32 x 26800 x 650813660610
32 x 24800 x 600813610610
34 x 32850 x 800864813610
34 x 30850 x 750864762610
34 x 28850 x 700864711610
34 x 26850 x 650864660610
34 x 24850 x 600864610610
36 x 34900 x 850914864610
36 x 32900 x 800914713610
36 x 30900 x 750914762610
36 x 28900 x 700914711610
36 x 26900 x 650914660610
36 x 24900 x 600914610610
38 x 36950 x 900965914610
38 x 34950 x 850965864610
38 x 32950 x 800965813610
38 x 30950 x 750965762610
38 x 28950 x 700965711610
38 x 26950 x 650965660610
38 x 24950 x 600965660610
38 x 22950 x 550965660610
38 x 20950 x 500965660610
40 x 381000 x 950965965610
40 x 361000 x 9001016914610
40 x 341000 x 8501016864610
40 x 321000 x 8001016813610
40 x 30100 x 7501016762610
40 x 281000 x 7001016711610
40 x 261000 x 6501016660610
40 x 241000 x 6001016610610
40 x 221000 x 5501016559610
40 x 201000 x 5001016508610
42 x 401050 x 100010671016610
42 x 381050 x 9501067965610
42 x 361050 x 9001067914610
42 x 341050 x 8501067864610
42 x 321050 x 8001067813610
42 x 301050 x 7501067762610
42 x 281050 x 7001067711610
42 x 261050 x 6501067660610
42 x 241050 x 6001067610610
42 x 221050 x 5501067559610
44 x 421100 x 105011181067610
44 x 401100 x 100011181016610
44 x 381100 x 9501118965610
44 x 361100 x 9001118914610
44 x 341100 x 8501118864610
44 x 321100 x 8001118813610
44 x 301100 x 7501118762610
44 x 281100 x 7001118711610
44 x 261100 x 6501118660610
44 x 241100 x 6001118610610
44 x 221100 x 5501118559610
46 x 441150 x 110011681118711
46 x 421150 x 105011681067711
46 x 401150 x 100011681016711
46 x 381150 x 9501168965711
46 x 361150 x 9001168914711
46 x 341150 x 8501168864711
46 x 321150 x 8001168813711
46 x 301150 x 7501168762711
46 x 281150 x 7001168711711
46 x 261150 x 6501168660711
46 x 241150 x 6001168610711
48 x 461200 x 115012191168711
48 x 441200 x 111012191118711
48 x 421200 x 105012191067711
48 x 401200 x 100012191016711
48 x 381200 x 9501219965711
48 x 361200 x 9001219914711
48 x 341200 x 8501219864711
48 x 321200 x 8001219813711
48 x 301200 x 7501219762711
48 x 281200 x 7001219711711
48 x 261200 x 6501219660711
48 x 241200 x 6001219610711
50 x 481250 x 120012701219711
50 x 421250 x 105012701067711
50 x 361250 x 9001270914711
50 x 301250 x 7501270762711
50 x 241250 x 6001270610711
50 x 201250 x 5001270508711
52 x 501300 x 125013211270711
52 x 481300 x 120013211219711
52 x 421300 x 105013211067711
52 x 361300 x 9001321914711
52 x 301300 x 7501321762711
52 x 241300 x 6001321610711
54 x 521350 x 130013721321711
54 x 481350 x 120013721219711
54 x 421350 x 105013721067711
54 x 361350 x 9001372914711
54 x 301350 x 7501372762711
54 x 241350 x 6001372610711
56 x 541400 x 135014221372711
56 x 481400 x 120014221219711
56 x 421400 x 105014221067711
56 x 361400 x 9001422914711
56 x 301400 x 7501422762711
56 x 241400 x 6001422610711
58 x 561450 x 140014731422711
58 x 541450 x 135014731372711
58 x 481450 x 120014731219711
58 x 421450 x 105014731067711
58 x 361450 x 9001473914711
58 x 301450 x 7501473762711
60 x 581500 x 145015241473711
60 x 541500 x 135015241372711
60 x 481500 x 120015241219711
60 x 421500 x 105015241067711
60 x 361500 x 9001524914711
60 x 301500 x 7501524762711
  • 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