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 cap 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

sp75_cap

sp75_cap

NPS
D
DN
D
OD
D
Length
H
Length
H*
16400406.4178203
18450457203229
20500508229254
22550559254279
24600610267305
26650660267305
28700711267305
30750762267305
32800813267305
34850864267305
36900914267305
38950965305343
4010001016305343
4210501067305343
4411001118343381
4611501168343381
4812001219343381
5012501270368406
5213001321368406
5413501372406445
5614001422406445
5814501473419457
6015001524419457
  • Dimensions are in millimeters unless otherwise indicated
  • Wall thickness (t) must be specified by customer
  • For (t) greater than 1.0 inch, caps may be furnished to length H*, at option of manufacturer
  • The shape of these caps shall be ellipsoidal and shall conform to the shape requirements as given in the ASME BPVC

 

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