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Size Range: 1/8” - 3” / DN6 - DN80
Pressure Rating: Class 3000lbs
Standard: MSS SP-83
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MSS SP 83 threaded union is used to connect two pipes and the ends will be machined to NPT or BSP that match external end threads of pipe.The ANSI/ASME B16.1threaded union is similar to the coupling and can be flexibly disassembled when it needs to be repaired or replaced. The large demand material is carbon steel A105 and stainless steel 304 & 316. We manufacture forged steel union according to MSS SP-83.
It is commonly conforming to ASTM A105N /SA105N, N means Normalized. This material is generally used for manufacturing forging process and high pressure system.
Chemical Composition
Grade | C max | Si max | Mn | S max | P max | Cu max | Ni max | Mo max | V max | Cr max |
A105N | 0.35 | 0.35 | 0.6-1.05 | 0.05 | 0.04 | 0.4 | 0.4 | 0.12 | 0.08 | 0.3 |
The appropriate carbon content in ASTM A105N gives the material a certain strength, while the manganese element helps to improve the toughness and machinability of the material.
Mechnical Properties
Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % min | Reduction Area % min | Hardness HBW |
A105N | 485 | 250 | 30 | 30 | 197 |
A105N material has high yield strength and tensile strength. The yield strength is generally around 250MPa, and the tensile strength is around 485MPa. This strength characteristic enables it to withstand a certain pressure and is suitable for medium and low pressure pipeline systems.
Chemical Composition
Grade | C max | Mn max | P max | S max | Si max | Ni | Cr | Mo | N mas |
304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0-11.0 | 18.0-20.0 | 0.10 | |
316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 10.0-14.0 | 16.0-18.0 | 2.0-3.0 | 0.10 |
Carbon is an important element in steel for forged unions. A proper amount of carbon can improve the strength of steel. The content of carbon is generally between 0.03% and 0.1%. If the carbon content is too low, the strength of the union may be insufficient and it is easy to deform when subjected to pressure or tension.
Mechnical Properties
GRADE | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % min | Reduction Area % min |
304 | 515 | 205 | 30 | 50 |
316 | 515 | 205 | 30 | 50 |
Tensile strength is the maximum stress that a threaded union can withstand in a tensile test. It reflects the ability of the union to resist fracture. Higher tensile strength ensures that the union will not break when subjected to tension.
Feature
Forging
Female
High Pressure
Easy Install / Uninstall
High Cost than Coupling
CLASS 3000 Threaded Union Dimensions
Nominal Size | Pipe End | Wall | Bone | Male Flange | Nut | THRD Per Inch | Bearing | Length Assem | Clear Assem Nut | |
DN | NPS | Amin | Cmin | D | Fmin | Gmin | H | Jmin | Lnom | N |
6 | 1/8 | 14.7 | 2.4 | 8.4 6.4 | 3.2 | 3.2 | 16 | 1.2 | 41.4 | 51 |
8 | 1/4 | 19.1 | 3.0 | 11.1 9.4 | 3.2 | 3.2 | 16 | 1.2 | 41.4 | 51 |
10 | 3/8 | 22.9 | 3.2 | 14.3 13.5 | 3.4 | 3.4 | 14 | 1.4 | 46.0 | 56 |
15 | 1/2 | 27.7 | 3.7 | 17.9 17.1 | 3.7 | 3.7 | 14 | 1.5 | 49.0 | 59 |
20 | 3/4 | 33.5 | 3.9 | 23.0 21.4 | 4.1 | 4.1 | 11 | 1.7 | 56.9 | 66 |
25 | 1 | 41.4 | 4.5 | 29.0 27.7 | 4.6 | 4.4 | 11 | 1.9 | 62.0 | 79 |
32 | 11/4 | 50.5 | 4.9 | 37.7 35.4 | 5.3 | 5.2 | 10 | 2.1 | 71.1 | 94 |
40 | 11/2 | 57.2 | 5.1 | 43.5 41.2 | 5.8 | 5.6 | 10 | 2.3 | 76.5 | 112 |
50 | 2 | 70.1 | 5.5 | 55.6 52.1 | 6.6 | 6.4 | 10 | 2.7 | 86.1 | 132 |
65 | 21/2 | 85.3 | 7.0 | 66.3 64.3 | 7.5 | 7.1 | 8 | 3.1 | 102.4 | 150 |
80 | 3 | 102.4 | 7.6 | 82.6 77.3 | 8.3 | 8.0 | 8 | 3.5 | 109.0 | 176 |
Note:
1) H is the number of threads per inch with the min of 4 tighting turns, and the female and male thread herein shall be machined per ASME B1.1 2A/2B.
NOMINAL SZIE | WEIGHT | |
DN | NPS | 3000 |
6 | 1/8 | 0.25 |
8 | 1/4 | 0.30 |
10 | 3/8 | 0.35 |
15 | 1/2 | 0.46 |
20 | 3/4 | 0.61 |
25 | 1 | 0.85 |
32 | 1-1/4 | 1.35 |
40 | 1-1/2 | 2.85 |
50 | 2 | 4.00 |
65 | 2-1/2 | 4.90 |
80 | 3 | 7.10 |
Steps for inspecting the union
We are very strict in inspecting the threaded union. First, our inspectors will use the selected measuring tools to accurately measure the various dimensions of the union, including the diameter, pitch and other parameters of the union. The measurement results will be compared with the design drawings or standard requirements of the union to ensure that its various dimensions meet the specification requirements. After that, the union will be subjected to tensile tests using equipment such as tensile testing machines to test its mechanical performance indicators such as tensile strength and elongation.
Advantages of Threaded Union
High strength: According to the principle of cold working hardening of steel, the strength of the straight thread rolled on the steel bar is greatly improved, so that the tensile strength of the union is higher than the tensile strength of the steel bar parent material.
Stable performance: The connection process of the forged union is not affected by the quality of the workers. As long as the operation is carried out in accordance with the specifications, the performance of the connection can be guaranteed to be stable.
Strong applicability: Forged unions can connect horizontal, vertical, and oblique steel bars of the same or different diameters, and can also be used to connect various pipes and equipment. This wide applicability allows the union to be used in various projects.
MSS SP 83 threaded union is used to connect two pipes and the ends will be machined to NPT or BSP that match external end threads of pipe.The ANSI/ASME B16.1threaded union is similar to the coupling and can be flexibly disassembled when it needs to be repaired or replaced. The large demand material is carbon steel A105 and stainless steel 304 & 316. We manufacture forged steel union according to MSS SP-83.
It is commonly conforming to ASTM A105N /SA105N, N means Normalized. This material is generally used for manufacturing forging process and high pressure system.
Chemical Composition
Grade | C max | Si max | Mn | S max | P max | Cu max | Ni max | Mo max | V max | Cr max |
A105N | 0.35 | 0.35 | 0.6-1.05 | 0.05 | 0.04 | 0.4 | 0.4 | 0.12 | 0.08 | 0.3 |
The appropriate carbon content in ASTM A105N gives the material a certain strength, while the manganese element helps to improve the toughness and machinability of the material.
Mechnical Properties
Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % min | Reduction Area % min | Hardness HBW |
A105N | 485 | 250 | 30 | 30 | 197 |
A105N material has high yield strength and tensile strength. The yield strength is generally around 250MPa, and the tensile strength is around 485MPa. This strength characteristic enables it to withstand a certain pressure and is suitable for medium and low pressure pipeline systems.
Chemical Composition
Grade | C max | Mn max | P max | S max | Si max | Ni | Cr | Mo | N mas |
304 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 8.0-11.0 | 18.0-20.0 | 0.10 | |
316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 10.0-14.0 | 16.0-18.0 | 2.0-3.0 | 0.10 |
Carbon is an important element in steel for forged unions. A proper amount of carbon can improve the strength of steel. The content of carbon is generally between 0.03% and 0.1%. If the carbon content is too low, the strength of the union may be insufficient and it is easy to deform when subjected to pressure or tension.
Mechnical Properties
GRADE | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % min | Reduction Area % min |
304 | 515 | 205 | 30 | 50 |
316 | 515 | 205 | 30 | 50 |
Tensile strength is the maximum stress that a threaded union can withstand in a tensile test. It reflects the ability of the union to resist fracture. Higher tensile strength ensures that the union will not break when subjected to tension.
Feature
Forging
Female
High Pressure
Easy Install / Uninstall
High Cost than Coupling
CLASS 3000 Threaded Union Dimensions
Nominal Size | Pipe End | Wall | Bone | Male Flange | Nut | THRD Per Inch | Bearing | Length Assem | Clear Assem Nut | |
DN | NPS | Amin | Cmin | D | Fmin | Gmin | H | Jmin | Lnom | N |
6 | 1/8 | 14.7 | 2.4 | 8.4 6.4 | 3.2 | 3.2 | 16 | 1.2 | 41.4 | 51 |
8 | 1/4 | 19.1 | 3.0 | 11.1 9.4 | 3.2 | 3.2 | 16 | 1.2 | 41.4 | 51 |
10 | 3/8 | 22.9 | 3.2 | 14.3 13.5 | 3.4 | 3.4 | 14 | 1.4 | 46.0 | 56 |
15 | 1/2 | 27.7 | 3.7 | 17.9 17.1 | 3.7 | 3.7 | 14 | 1.5 | 49.0 | 59 |
20 | 3/4 | 33.5 | 3.9 | 23.0 21.4 | 4.1 | 4.1 | 11 | 1.7 | 56.9 | 66 |
25 | 1 | 41.4 | 4.5 | 29.0 27.7 | 4.6 | 4.4 | 11 | 1.9 | 62.0 | 79 |
32 | 11/4 | 50.5 | 4.9 | 37.7 35.4 | 5.3 | 5.2 | 10 | 2.1 | 71.1 | 94 |
40 | 11/2 | 57.2 | 5.1 | 43.5 41.2 | 5.8 | 5.6 | 10 | 2.3 | 76.5 | 112 |
50 | 2 | 70.1 | 5.5 | 55.6 52.1 | 6.6 | 6.4 | 10 | 2.7 | 86.1 | 132 |
65 | 21/2 | 85.3 | 7.0 | 66.3 64.3 | 7.5 | 7.1 | 8 | 3.1 | 102.4 | 150 |
80 | 3 | 102.4 | 7.6 | 82.6 77.3 | 8.3 | 8.0 | 8 | 3.5 | 109.0 | 176 |
Note:
1) H is the number of threads per inch with the min of 4 tighting turns, and the female and male thread herein shall be machined per ASME B1.1 2A/2B.
NOMINAL SZIE | WEIGHT | |
DN | NPS | 3000 |
6 | 1/8 | 0.25 |
8 | 1/4 | 0.30 |
10 | 3/8 | 0.35 |
15 | 1/2 | 0.46 |
20 | 3/4 | 0.61 |
25 | 1 | 0.85 |
32 | 1-1/4 | 1.35 |
40 | 1-1/2 | 2.85 |
50 | 2 | 4.00 |
65 | 2-1/2 | 4.90 |
80 | 3 | 7.10 |
Steps for inspecting the union
We are very strict in inspecting the threaded union. First, our inspectors will use the selected measuring tools to accurately measure the various dimensions of the union, including the diameter, pitch and other parameters of the union. The measurement results will be compared with the design drawings or standard requirements of the union to ensure that its various dimensions meet the specification requirements. After that, the union will be subjected to tensile tests using equipment such as tensile testing machines to test its mechanical performance indicators such as tensile strength and elongation.
Advantages of Threaded Union
High strength: According to the principle of cold working hardening of steel, the strength of the straight thread rolled on the steel bar is greatly improved, so that the tensile strength of the union is higher than the tensile strength of the steel bar parent material.
Stable performance: The connection process of the forged union is not affected by the quality of the workers. As long as the operation is carried out in accordance with the specifications, the performance of the connection can be guaranteed to be stable.
Strong applicability: Forged unions can connect horizontal, vertical, and oblique steel bars of the same or different diameters, and can also be used to connect various pipes and equipment. This wide applicability allows the union to be used in various projects.
