API 5L X80
TUSPIPE’s API 5L X80 is API standard certified, a high-grade line pipe that meets more demanding engineering requirements. TUSPIPE’s precision manufacturing ensures that each pipe meets stringent performance specifications, providing customers with greater reliability in large-scale oil and gas projects.
API 5L X80
API 5L X80 is a type of pipeline steel used in the transportation of petroleum, oil & gas. This type of pipe is mostly used to transfer fluids, including crude oil, natural gas, and petroleum products, from one site to another.
This sort of pipe is often constructed from high-strength steel, which enables it to survive the high pressures and temperatures that are common in these sectors. In addition, API 5L X80 line pipe is typically coated with a layer of corrosion-resistant material, such as FBE, 3LPE, or 3LPP, to protect it from the harsh environment in which it is used.
タスパイプを選ぶ理由
1998年以来、天津聯合鋼管有限公司(TUSPIPE)は高品質のラインパイプの供給に尽力しています。
年間生産能力は50万トンを超え、石油・ガス開発、送電、船舶・自動車建造、水・電気、環境保護、機械工学、インフラ建設など、さまざまな分野・業界にサービスを提供している。
TUSPIPEは製品の品質を重視し、厳格な品質管理を行っている。製品の品質を維持するため、2004年から試験検査センターを設立しました。最新の試験・検査設備を備え、引張試験、水力試験、衝撃試験、DWTTなどを実施することができます。
Application of API 5L X80 Line Pipe
API 5L X80 line pipe is a commonly used pipeline in the petroleum and oil and gas industries. The main advantage of using API 5L X80 materials is its high strength. This allows it to transport large volumes of petroleum and oil without fear of rupturing or leaking. Additionally, its resistance to corrosion means that it can be used in a wide range of environments without fear of degradation.
As a result, API 5L X80 pipe is an essential component of the petroleum and oil and gas industries, and its applications are varied and essential
Equivalent Steel Grade of X80 Material
| 鋼種 | Equivalent Grade |
| API 5L X80 PSL-1 | - |
| API 5L X80 PSL-2 | L555QまたはX80Q |
| L555MまたはX80M |
Chemical Composition of API 5L X80 Pipe with t ≤ 0.984”
| 鋼種 | 熱分析および製品分析に基づく質量分率、% | 炭素換算 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | ムン | P | S | V | Nb | ティ | その他 | CE IIW | CE Pcm | |
| max b | マックス | max b | マックス | マックス | マックス | マックス | マックス | マックス | マックス | ||
| Seamless and Welded Pipe | |||||||||||
| X80Q | 0.18f | 0.45f | 1.90f | 0.025 | 0.015 | g | g | g | i,j | 合意通り | |
| 溶接パイプ | |||||||||||
| X80M | 0.12f | 0.45f | 1.85f | 0.025 | 0.015 | g | g | g | i,j | .043f | 0.25 |
a.SMLS t>0.787 "の場合、CEリミットは合意されたとおりとする。C＞0.12%の場合はCEIIWリミットが適用され、C≦0.12%の場合はCEPcmリミットが適用される、
b. For each reduction of 0.01% below the specified maximum for C, an increase of 0.05% above the specified maximum for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; up to a maximum of 2.00% for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2.20% for grades > L555 or X80.,
c.別段の合意がない限り、Nb = V ≤ 0.06%、
d.Nb = V = Ti ≤ 0.15%、
e.別段の合意がない限り、Cu≦0.50%；Ni≦0.30% Cr≦0.30%、Mo≦0.15%、
f.別段の合意がない限り、
g.別段の合意がない限り、Nb + V + Ti ≤ 0.15%、
h.特に断りのない限り、Cu≦0.50% Ni≦0.50% Cr≦0.50%、MO≦0.50%、
i.別段の合意がない限り、Cu≦0.50% Ni≦1.00% Cr≦0.50%、MO≦0.50%、
j.b ≤ 0.004%、
k.特に断りのない限り、Cu≦0.50% Ni≦1.00% Cr≦0.55%、MO≦0.80%、
l.脚注j が付された等級を除くすべてのPSL 2鋼管には、以下が適用される。別段の合意がない限り、意図的なBの添加は認められず、残留B≦0.001%。
API 5L X80 Mechanical Properties
| パイプグレード | Tensile Properties – Pipe Body of SMLS and Welded Pipes PSL 2 | Seam of Welded Pipe | |||||
|---|---|---|---|---|---|---|---|
| Yield Strength a | Tensile Strength a | Ratio a,c | 伸び | Tensile Strength d | |||
| Rt0,5 PSI Min | Rm PSI Min | R10,5IRm | (in 2in) Af % | Rm (psi) | |||
| Minimum | Maximum | Minimum | Maximum | Maximum | Minimum | Minimum | |
| X80Q，X80M | 80,.500 | 102,300 | 90,600 | 119,700 | 0.93 | f | 90,600 |
| a. For intermediate grade, refer to the full API 5L X80 specification. | |||||||
| b. for grades > X90 refer to the full API5L specification. | |||||||
| c. This limit applies for pies with D> 12.750 in | |||||||
| d. For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using foot a. | |||||||
| e. for pipe requiring longitudinal testing, the maximum yield strength shall be ≤ 71,800 psi | |||||||
| f. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation: | |||||||
 | |||||||
| Where C is 1 940 for calculation using Si units and 625 000 for calculation using USC units | |||||||
| Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches) , as follows | |||||||
| – For circular cross-section test pieces, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) diameter test pieces. | |||||||
| – For full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | |||||||
| – For strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.10in2) | |||||||
| U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch | |||||||
| g. Lower values fo R10,5IRm may be specified by agreement | |||||||
| h. for grades > x90 refer to the full API5L specification. |
Dimensions and Sizes of API 5L X80
Before buying an API 5L X80 pipe, check its size and dimensions to meet required API 5L X80 standards. Refer to ISO 4200 and ASME B36.10M, which specify dimensions and masses. These standards offer size guides and wall thickness details. Verify compliance by consulting the tables in these standards to ensure the right diameter and correct wall thickness. Purchasing pipes outside these standards may cause installation or usage problems, underscoring the importance of knowing dimensions and tolerances before making a purchase.
| NPS | O.D. | W.T. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 識別名 | インチ | mm | SCH5S | SCH10S | SCH10 | SCH20 | SCH30 | SCH40 | SCH60 | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 | ス | XS | XXS |
| 50 | 2″ | 60.3 | 1.65 | 2.77 | - | - | - | 3.91 | - | 5.54 | - | - | - | 8.74 | 3.91 | 5.54 | 11.07 |
| 65 | 2 1/2″ | 73 | 2.11 | 3.05 | - | - | - | 5.16 | - | 7.01 | - | - | - | 9.53 | 5.16 | 7.01 | 14.02 |
| 80 | 3″ | 88.9 | 2.11 | 3.05 | - | - | - | 5.49 | - | 7.62 | - | - | - | 11.13 | 5.49 | 7.52 | 15.24 |
| 90 | 3 1/2″ | 101.6 | 2.11 | 3.05 | - | - | - | 5.74 | - | 8.08 | - | - | - | - | 5.74 | 8.08 | - |
| 100 | 4″ | 114.3 | 2.11 | 3.05 | - | - | - | 6.02 | - | 8.58 | - | 11.13 | - | 13.49 | 6.02 | 8.56 | 17.12 |
| 125 | 5″ | 141.3 | 2.77 | 3.4 | - | - | - | 6.55 | - | 9.53 | - | 12.7 | - | 15.88 | 6.55 | 9.53 | 18.05 |
| 150 | 6″ | 168.3 | 2.77 | 3.4 | - | - | - | 7.11 | - | 10.97 | - | 14.27 | - | 18.26 | 7.11 | 10.97 | 21.95 |
| 200 | 8″ | 219.1 | 2.77 | 3.76 | - | 6.35 | 7.04 | 8.18 | 10.31 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 | 8.18 | 12.7 | 22.23 |
| 250 | 10″ | 273.1 | 3.4 | 4.19 | - | 6.35 | 7.8 | 9.27 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 | 9.27 | 12.7 | 25.4 |
| 300 | 12″ | 323.9 | 3.96 | 4.57 | - | 6.35 | 8.38 | 10.31 | 14.27 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 | 9.53 | 12.7 | 25.4 |
| 350 | 14″ | 355.5 | 3.96 | 4.78 | 6.35 | 7.92 | 9.53 | 11.13 | 15.09 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 | 9.53 | 12.7 | - |
| 400 | 16″ | 406.4 | 4.19 | 4.78 | 6.35 | 7.92 | 9.53 | 12.7 | 16.66 | 21.44 | 26.19 | 30.96 | 36.53 | 40.49 | 9.53 | 12.7 | - |
| 450 | 18″ | 457.2 | 4.19 | 4.78 | 6.35 | 7.92 | 11.13 | 14.27 | 19.05 | 23.83 | 39.36 | 34.93 | 39.67 | 45.24 | - | - | - |
| 500 | 20″ | 508 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | 15.09 | 20.62 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 | - | - | - |
| 550 | 22″ | 558.8 | 4.78 | 5.54 | 6.35 | 9.53 | 12.7 | - | 22.23 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | - | - | - |
| 600 | 24″ | 609.6 | 5.54 | 6.35 | 6.35 | 9.53 | 14.27 | 17.48 | 24.61 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 | - | - | - |
API 5L X80 Pipe Tolerance
| O.D. Tolerance | W.T. Tolerance | ||
|---|---|---|---|
| X80 | |||
| D ＜ 60.3mm | +0.41/-0.40mm | D ＜ 73mm | +15%/-12.5% |
| D ≥ 60.3m | +0.75/-0.40mm | D ≥ 73mm | +15%/-12.5% |
Test and inspection of API 5L X80
- 静水圧試験
The hydrostatic test is a crucial step in API 5L line pipe production. It involves using water to check for leaks in the weld seam or pipe body. Water pressure is gradually increased until it reaches the specified value.
- 曲げテスト
The bending test is a vital quality check in API 5L X80 line pipe production. It entails applying force to a steel pipe sample until it cracks, ensuring it won’t fracture under stress during service. Typically performed on welded samples, where failures are common, the test also assesses unwelded samples to verify material quality. Bend test results guide adjustments in the manufacturing process to meet required standards and produce a reliable final product.
- 平坦化テスト
The flattening test is a crucial mechanical assessment in steel pipe manufacturing, ensuring the quality of the final product and preventing potential issues like cracks. By applying force to a pipe sample until it deforms, the test measures the amount of deformation, offering insights into the pipe’s strength and resistance to cracking.
- CVN衝撃テスト
Companies producing API 5L X80 must undergo an impact test, evaluating the pipe body, weld seam, and heat-affected zone. This test ensures the line pipe’s ability to withstand abrupt changes in temperature and pressure without shattering. Failure in any of these areas results in non-certification and disallows sale. The impact test is one of several assessments a line pipe undergoes for API certification.
