ASTM A252 グレード 2
TUSPIPE’s ASTM A252 Grade 2 pipes are fully compliant with ASTM A252 specifications. With stronger mechanical performance, they give customers durable and stable piling solutions in construction and foundation projects.
ASTM A252 グレード 2
ASTM A252 Grade 2 steel pipe is one of the most commonly used pile pipes. Piling pipes serve as the foundation of the building sector. Because of their tremendous strength, they are thought to be employed in applications that need strong structural qualities. ASTM A252 is a standard that deals with the issue. The cylindrical ASTM A252 Grade 2 Pipe is used for piling, either as a shell for a cast concrete pile or as a permanent element carrying weight in the specified application. This specification encompasses the nominal wall of the cylindrical steel piling pipe.
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。
Applications of ASTM A252 Grade 2 Piling Pipe
ASTM A252 Grade 2 pipe piling is being developed for use in a direction with deep distances and large diameters due to the increasing height of structures, buildings, and bridges. The cylindrical design of ASTM A252 Grade 2 pipe is suitable for a wide range of applications, including building retaining walls, different types of buildings that need a tough base, and bridges. This guarantees that construction using this type of pipe is solid, stable, and of the greatest quality – meeting international quality standards. large diameter pipes are essential in the construction world due to their many purposes and benefits. They help ensure the stability and strength of tall structures while also providing a variety of other benefits. This makes them an essential part of many large-scale construction projects. Consequently, developers must continue to create large-diameter pipes that meet the needs of these projects. This will help to ensure that these projects can be completed safely and effectively.
Specification of ASTM A252 Grade 2
| スタンダード | A252 |
| 仕様 | 溶接鋼管杭 |
| タイプ | 電気抵抗溶接（ERW） |
| サイズ | NPS 1～NPS 24 [DN25～DN 600]、公称平均肉厚はASME B 36.10M、またはお客様のご要望に応じます。 |
| 外径 | 1～24インチ（33.4～609.6mm） |
| 厚さ | 3-12mm |
| 長さ | 最小3M、最大18M、または顧客の要求に従って。 |
| 終了 | 小さなサイズはプレーンであり、大きなサイズは面取りされており、または顧客の要件に応じて |
| 表面処理 | 通常は裸か黒ニス |
| パッケージング | 219.1mm以下の小サイズは束で、大サイズはバルクで。 |
| テスト | 化学組成、熱分析、製品分析、引張要件など、お客様のご要望にお応えします。 |
Chemical Composition of ASTM A252 Grade 2 Steel Piling Pipe
The standard specifies the requirements for ASTM A252 Grade 2 welded and seamless steel pipe piles. The chemical analysis is a critical part of confirming compliance with this standard. The analysis shall be performed in accordance with test methods, practices, and terminology ASTM A751. A minimum of two samples shall be taken from each heat lot of pipe piles, and analyses shall be made on these samples. Therefore, it is important to carefully review the specification and make sure that the correct analyses are being performed.
Mechanical Properties of ASTM A252 Grade 2 Piling pipes
The ASTM A252 Grade 2 pipes must meet the minimum requirements for tensile strength, as outlined in the tables below. The yield point is the point at which the specimen (whether it be a beam, gage, divider, etc.) is deemed to have failed the test, and is usually determined by observing the point at which permanent deformation occurs. If no definite yield point can be observed, then the yield strength must correspond to either a 0.2% permanent offset of the original gage length or a 0.5% total extension under load. These methods for determining yield strength are essential in ensuring that the material meets the minimum requirements for use. Without these standards in place, materials could be used that are not up to par, leading to subpar performance and potential disaster. Thus, these requirements serve an important role in protecting both people and property.
- 引張要件
| NorE 1-この表で省略記号（...）が表示されている場合は、その必要はない。. | ||||
|---|---|---|---|---|
| 引張強さ、最小、psi [MPa］ | グレード1 | グレード2 | グレード3 | |
| 降伏点または降伏強さ、最小、psi［MPa］ | 50 000[345] | 60 000[415] | 60 000[455] | |
| 公称肉厚% in.以上の基本最小伸び。[7.9mm]以上の場合： | 30 000[205] | 35 000[240] | 45 000[310] | |
| 最小8インチ[2032 mm]での伸び、% | 18 | 14 | - | |
| 最小2インチ[50.8 mm]での伸び % | 30 | 25 | 20 | |
| 公称肉厚が5/16インチ[7.9mm]未満の場合、公称肉厚が5/16インチ[7.9mm]から1/32インチ[0.8mm]減少するごとに、基本最小伸びから2インチ[50.8mm]減じた値（単位：％）。 | 1.5A | 1.25A | 1.0A | |
| 表2に計算された最小値を示す： | ||||
- 最小伸び
| 公称肉厚 | 2インチ[50.8mm]での伸び、最小、% | |||
|---|---|---|---|---|
| にある。 | mm | グレード1 | グレード2 | グレード3 |
| 5/16または0.312 | 7.9 | 30.00 | 25.00 | 20.00 |
| 9/32または0.281 | 7.1 | 28.50 | 23.75 | 19.00 |
| 1/4 0r 0.250 | 6.4 | 27.00 | 22.50 | 18.00 |
| 7/32または0.219 | 5.6 | 25.50 | 21.25 | 17.00 |
| 3/16または0.188 | 4.8 | 24.00 | 20.00 | 16.00 |
| 11/64または0.172 | 4.4 | 23.25 | 19.50 | 15.50 |
| 5/32または0.156 | 4.0 | 22.50 | 18.75 | 15.00 |
| 9/64または0.141 | 3.6 | 21.75 | 18.25 | 14.50 |
| 1/8または0.125 | 3.2 | 21.00 | 17.50 | 14.00 |
| 7/64または0.109 | 2.8 | 20.25 | 16.75 | 13.50 |
| A 上の表は、さまざまな呼び厚さに対する最小伸びの計算値である。指定された公称肉厚が上記の中間値である場合、最小伸び値は以下のように決定される： | ||||
| グレード | ||||
| 1 | E = 48t + 15.00[E=1.90t+15.00]。 | |||
| 2 | E = 40t + 12.50[E=1.56t+12.50]である。 | |||
| 3 | E = 32t + 10.00[E=1.25t+10.00]。 | |||
| どこだ？ | ||||
| E = 2インチでの伸び...%and | ||||
| t = 公称肉厚。. | ||||
ASTM A252 杭用鋼管の許容変動幅
| 項目 | 寛容 |
|---|---|
| 単位重量 | +15%,-5% |
| 外径 | ±1% |
| 壁厚 | ±12.5% |
- According to this standard, each length of ASTM A252 Grade 2 pipe pile must be weighed separately. The weight of the pipe must not vary more than 15% over or 5% under its theoretical weight. This weight can be calculated using the pipe’s length and its weight per unit length. If the purchase order does not specify a weight, the manufacturer must ensure that the pipe conforms to the specified calculation formula.
- The outside diameter of pipe piles shall not deviate by more than 1% from the diameter specified.
- The wall thickness at any location shall not deviate by more than 12.5% from the nominal thickness.
