ASTM A420 WPL6 Elbow manufacturer
We are a ASTM A420 WPL6 elbow manufacturer, supplying premium-grade butt-weld elbows for use in low-temperature pressure piping systems. Our elbows are manufactured in accordance with ASME B16.9 and ASTM A420 standards, ensuring high strength, toughness, and leak-free connections in extreme cold conditions.
What is ASTM A420 WPL6?
ASTM A420 WPL6 is a standard specification for wrought Low temperature steel pipe fittings, specifically designed for low-temperature service. ASTM A420 Pipe fittings Covers wrought carbon steel and alloy steel butt-welding fittings, including elbows, tees, reducers, and caps.
ASTM A420 WPL6 Elbow Specifications
| Standard | ASTM A420 / ASME SA420 |
|---|---|
| Material Grade | WPL6 (Low-Temperature Carbon Steel) |
| Type | 90° Elbow, 45° Elbow, 180° Return |
| Size Range | ½″ to 48″ (DN15 to DN1200) |
| Schedule | SCH 10S, 20, 40, 80, 160, XXS |
| Manufacturing | Seamless & Welded (Hot Formed or Cold Bending) |
| Standards | ASME B16.9, MSS-SP-75 |
| Impact Tested | Yes, at -46°C (-50°F) or as required |
| NDE/Testing | Radiography, UT, |
WPL6 Material Grade
- WPL6 stands for:
- W: Wrought
- P: Pressure
- L6: Low-temperature grade 6 carbon steel pipe according to ASTM A333
ASTM A420 WPL6 Elbows are produced from ASTM A333 grade 6 Seamess pipe ,and match ASTM A350 LF2 flanges in the pipeline connection
These 3 materials are designed for low-temperature service, and they are often used together in cryogenic and cold service pipeline systems.
Typical Low-Temperature Piping Spool may consisit of following items
- Pipe: ASTM A333 Gr. 6 Seamless Pipes
- Fittings: ASTM A420 WPL6 elbows, ASTM A420 WPL6 tees, ASTM A420 WPL6 reducers
- Flanges: ASTM A350 LF2 Cl.1 weld neck Flanges, slip-on, blind, etc.
ASTM A420 WPL6 Elbow Heat Treatment
All fittings shall be furnished in the normalized, normalized and tempered, annealed, or quenched and tempered condition. All welding shall be completed prior to the austenitizing heat treatment.
ASTM A420 WPL6 Elbow Chemical Composition
| Grade | C | Mn | P | S | Si | Ni | Cr | Mo | Cu | Nb | V |
| WPL6 | 0.3 | 0.50 – 1.35 | 0.035 | 0.04 | 0.15 – 0.40 | 0.4 | 0.3 | 0.12 | 0.4 | 0.02 | 0.08 |
The steel shall conform to requirements of chemical composition for the respective material prescribed in below table
ASTM A420 WPL6 Tensile Properties
The tensile properties of the fittings material shall conform to the requirements for the applicable grade of material as listed in below table
| Requirement | Grade – WPL6 |
| Tensile strength, min ksi [MPa] | 60 [415] – 95 [655] |
| Yield strength, min ksi [MPa] | 35 [240] |
| Elongation Requirements – Standard round specimen, or small proportional specimen, min % in 4D – Longitudinal | 22 |
| Elongation Requirements – Standard round specimen, or small proportional specimen, min % in 4D – Transverse | 12 |
| Elongation Requirements – Strip specimen for wall thickness ⅝ in. [7.94 mm] and over, and for all small sizes tested in full section; min % in 2 in. or 50 mm – Longitudinal | 30 |
Note 1: Where an ellipsis (…) appears in this table, there is no requirement.
A: Requirements for equivalent wall thickness expressed in inches and mm may differ from each other.编辑分享
ASTM A420 WPL6 Impact Test Properties
The Charpy V-Notch (CVN) impact requirements for ASTM A420 Grade WPL6 WPL9,WPL3 are critical because this material is used in low-temperature service.
Charpy Impact Requirements for ASTM A420 WPL6
| Size of Specimen (mm) | Charpy V – Notch Impact Value Required for Acceptance (Average of Three Specimens) | Minimum Charpy V – Notch Impact Value Without Requiring Retest (One Specimen Only of a Set) | ||
|---|---|---|---|---|
| ft·lbf | J | ft·lbf | J | |
| 10 by 10.0 | 13 | 18 | 10 | 14 |
| 10 by 7.5 | 10 | 14 | 8 | 11 |
| 10 by 5.0 | 7 | 9 | 5 | 7 |
| 10 by 2.5 | 4 | 5 | 3 | 4 |
ᴬStraight – line interpolation for intermediate values is permitted.
ASTM A420 WPL6 Impact Test Temperature
| Grade | Impact Test Temperature, °F [°C] |
| WPL6 | – 50 [ – 45] |
ASTM A420 WPL6 Elbow product type and Dimensions
Butt-welding fittings and butt-welding short-radius elbows and returns purchased in accordance with this specification shall conform to the dimensions and tolerances given in the latest revision of ASME B16.9 or MSS SP-95
45 deg ASTM A420 WPL6 Elbow long or short radius
90 deg ASTM A420 WPL6 Elbow long or short radius
180 deg ASTM A420 WPL6 Elbow long or short radius
ASTM A420 WPL6 Elbow Surface Finish, Appearance, and Corrosion Protection
The requirements of Specification A960/A960M apply.
Marking Requirements of ASTM A420 WPL6 Elbow
Fittings must be marked with:
- Manufacturer’s name or trademark
- Grade WPL6
- Heat number or traceability info
- Size and schedule
- ASTM A420 marking
Dimension of ASTM A420 WPL6 Elbow LONG RADIUS according to ASME B16.9
| Nominal Pipe Size | Outside Diameter at Bevel | Center-to-End | Center-to-Center | Back-to-Face | |
| 45-deg Elbows | 90-deg Elbows | 180-deg Elbows | |||
| NPS | OD | B | A | O | K |
| 1/2″ | 21.3 | 16 | 38 | 76 | 48 |
| 3/4″ | 26.7 | 19 | 38 | 76 | 51 |
| 1″ | 33.4 | 22 | 38 | 76 | 56 |
| 1-1/4″ | 42.2 | 25 | 48 | 95 | 70 |
| 1-1/2″ | 48.3 | 29 | 57 | 114 | 83 |
| 2″ | 60.3 | 35 | 76 | 152 | 106 |
| 2-1/2″ | 73.0 | 44 | 95 | 190 | 132 |
| 3″ | 88.9 | 51 | 114 | 229 | 159 |
| 3-1/2″ | 101.6 | 57 | 133 | 267 | 184 |
| 4″ | 114.3 | 64 | 152 | 305 | 210 |
| 5″ | 141.3 | 79 | 190 | 381 | 262 |
| 6″ | 168.3 | 95 | 229 | 457 | 313 |
| 8″ | 219.1 | 127 | 305 | 610 | 414 |
| 10″ | 273.0 | 159 | 381 | 762 | 518 |
| 12″ | 323.8 | 190 | 457 | 914 | 619 |
| 14″ | 355.6 | 222 | 533 | 1067 | 711 |
| 16″ | 406.4 | 254 | 610 | 1219 | 813 |
| 18″ | 457.0 | 286 | 686 | 1372 | 914 |
| 20″ | 508.0 | 318 | 762 | 1524 | 1016 |
| 22″ | 559.0 | 343 | 838 | 1676 | 1118 |
| 24″ | 610.0 | 381 | 914 | 1829 | 1219 |
| 26″ | 660.0 | 406 | 991 | － | － |
| 28″ | 711.0 | 438 | 1067 | － | － |
| 30″ | 762.0 | 470 | 1143 | － | － |
| 32″ | 813.0 | 502 | 1219 | － | － |
| 34″ | 864.0 | 533 | 1295 | － | － |
| 36″ | 914.0 | 565 | 1372 | － | － |
| 38″ | 965.0 | 600 | 1448 | － | － |
| 40″ | 1016.0 | 632 | 1524 | － | － |
| 42″ | 1067.0 | 660 | 1600 | － | － |
| 44″ | 1118.0 | 695 | 1676 | － | － |
| 46″ | 1168.0 | 727 | 1753 | － | － |
| 48″ | 1219.0 | 759 | 1829 | － | － |
Dimension of ASTM A420 WPL6 Elbow Short RADIUS according to ASME B16.9
| Nominal Pipe Size | Outside Diameter at Bevel | Center-to-End | Center-to-Center | Back-to-Face |
| 90-deg Elbows | 180-deg Elbows | |||
| NPS | OD | A | O | K |
| 1″ | 33.4 | 25 | 51 | 41 |
| 1-1/4″ | 42.2 | 32 | 64 | 52 |
| 1-1/2″ | 48.3 | 38 | 76 | 62 |
| 2″ | 60.3 | 51 | 102 | 81 |
| 2-1/2″ | 73.0 | 64 | 127 | 100 |
| 3″ | 88.9 | 76 | 152 | 121 |
| 3-1/2″ | 101.6 | 89 | 178 | 140 |
| 4″ | 114.3 | 102 | 203 | 159 |
| 5″ | 141.3 | 127 | 254 | 197 |
| 6″ | 168.3 | 152 | 305 | 237 |
| 8″ | 219.1 | 203 | 406 | 313 |
| 10″ | 273.0 | 254 | 508 | 391 |
| 12″ | 323.8 | 305 | 610 | 467 |
| 14″ | 355.6 | 356 | 711 | 533 |
| 16″ | 406.4 | 406 | 813 | 610 |
| 18″ | 457.0 | 457 | 914 | 686 |
| 20″ | 508.0 | 508 | 1016 | 762 |
| 22″ | 559.0 | 559 | 1118 | 838 |
| 24″ | 610.0 | 610 | 1219 | 914 |
Download the latest edition of ASTM A420 Standard 2024 PDF
Download ASME B16.9 Elbow Dimension Chart PDF now
Download ASTM A420 WPL6 specifiction PDF now
Typical Order Description for ASTM A420 WPL6 Elbow
ASTM A420 WPL6 Elbow, 90° Long Radius, Seamless, 12″ (DN300), SCH 80, Beveled Ends, ASME B16.9, NACE MR0175, BW, Black Finish
