High temperature alloy steel tubes are known as chrome moly pipe.
ASTM A213, A209 specification covers alloy steel seamless tube for high temperature service. Seamless alloy steel tubes are suitable for bending and similar forming operations, and for fusion welding at high temperatures. High temperature alloy steel tube are also considered as low alloy chrome moly grades.
ASTM/ASME A/SA213 Gr. T2, T11, T12, T22, T91, T92
ASTM/ASME A/SA335 Gr. P1, P2, P5, P11, P12, P22
ASTM/ASME A/SA209 T1, T1a, T1b
ASTM A213 tubing has been widely used in high temperature services especially for the boiler and superheater. Tube material could be in alloy steel and stainless steel, and manufactured in seamless of hot rolled or cold drawn. Common grades are T9, T11, T12, T21, T22, T91 and stainless grades in TP304 or TP316.
The A335 pipes are generally called chrome moly pipe, it is a type of seamless pipe could be used in high temperature environments of 540 – 750 °C, they have a high level of Chromium and Molybdenum presence in it, While Molybdenum increases the overall strength, resistance, elasticity, hardenability and overall quality, moly ensures that the material is more resistant to softening, restrains the growth of grains and lessens the chances of embrittlement. It is the single additive that is responsible for the increase in high temperature resistance and it also improves the corrosion resistance to steel.
This chrome moly pipe featured grades are ASTM A335 P9, P11, P22, P91, so also it could be called as P Grade pipe in some cases.
P11 pipe, P22 pipe and P91 pipes are used in power industry and petro-chemical plants, meanwhile, P5 and P9 pipe generally find usage in refineries.
ASTM A209 / A209M, ASME SA209 T1, T1a, T1b is the standard applicable to seamless carbon-Molybdenum Alloy-Steel Boiler and Superheater Tubes.
ขนาด:
OD: 6-720MM
WT: 0.5-120MM
ความยาว: 3-16M
Seamless Alloy Steel Tube Application:
1. Construction hall structure, sea trestle, airport structure, shipbuilding, security door frames, garage doors, strengthening liners of steel doors and windows, indoor partition walls, cable bridge structures and expressway safety guards, balustrade, decorating, residential, ornamental pipes.
2. Agriculture： Agricultural equipment.
3. Industry machinery, solar stent, offshore oil field, mine equipment, electromechanical hardware, , heavy engineering, mining and resources, process engineering, materials handling,mechanical parts.
4. Traffic walking rails, roll-up doors, guardrail, plaza structure, signage, road furniture, fencing logistics storage supermarket shelves, containers, transport industries, commercial construction other sports apparatus, leisure equipment, furniture, school furniture.
5. Material storage racks, pallets, hydraulic platforms, trusses, columns, purlins, greenhouse stands towers.
มาตรฐาน
| A335 | Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
| A213 | Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes |
| A209 | Standard Specification for Seamless Carbon-Molybdenum Alloy-Steel Boiler and Super heater Tubes |
เส้นผ่าศูนย์กลางภายนอกและความอดทน
| ASTM A450 | เหล็กแผ่นรีดร้อน | เส้นผ่าศูนย์กลางภายนอกมิลลิเมตร | อดทนมิลลิเมตร |
| OD≤101.6 | + 0.4 / -0.8 | ||
| 101.6＜OD≤190.5 | + 0.4 / -1.2 | ||
| 190.5＜OD≤228.6 | + 0.4 / -1.6 | ||
| ดึงเย็น | เส้นผ่าศูนย์กลางภายนอกมิลลิเมตร | อดทนมิลลิเมตร | |
| OD＜25.4 | ±0.10 | ||
| 25.4≤OD≤38.1 | ±0.15 | ||
| 38.1＜OD＜50.8 | ±0.20 | ||
| 50.8≤OD＜63.5 | ±0.25 | ||
| 63.5≤OD＜76.2 | ±0.30 | ||
| 76.2≤OD≤101.6 | ±0.38 | ||
| 101.6＜OD≤190.5 | + 0.38 / -0.64 | ||
| 190.5＜OD≤228.6 | + 0.38 / -1.14 | ||
| ASTM A530 และ A335 ASTM | กรมอุทยานฯ | เส้นผ่าศูนย์กลางภายนอกนิ้ว | อดทนมิลลิเมตร |
| 1/8≤OD≤1-1/2 | ±0.40 | ||
| 1-1/2＜OD≤4 | ± 0.79 | ||
| 4＜OD≤8 | + 1.59 / -0.79 | ||
| 8＜OD≤12 | + 2.38 / -0.79 | ||
| OD> 12 | ±1% |
ความหนาของผนังและความอดทน
| ASTM A450 | เหล็กแผ่นรีดร้อน | เส้นผ่าศูนย์กลางภายนอกมิลลิเมตร | อดทน% |
| OD≤101.6, WT≤2.4 | + 40 / -0 | ||
| OD≤101.6, 2.4＜WT≤3.8 | + 35 / -0 | ||
| OD≤101.6, 3.8＜WT≤4.6 | + 33 / -0 | ||
| OD≤101.6, WT>4.6 | + 28 / -0 | ||
| OD>101.6, 2.4＜WT≤3.8 | + 35 / -0 | ||
| OD>101.6, 3.8＜WT≤4.6 | + 33 / -0 | ||
| OD> 101.6, WT> 4.6 | + 28 / -0 | ||
| ดึงเย็น | เส้นผ่าศูนย์กลางภายนอกมิลลิเมตร | อดทน% | |
| OD≤38.1 | + 20 / -0 | ||
| OD> 38.1 | + 22 / -0 | ||
| ASTM A530 | กรมอุทยานฯ | เส้นผ่าศูนย์กลางภายนอกนิ้ว | อดทน% |
| 1/8≤OD≤2-1/2 | + 20.0 / -12.5 | ||
| 3≤OD≤18, WT/OD≤5% | + 22.5 / -12.5 | ||
| 3≤OD≤18, WT/OD>5% | + 15.0 / -12.5 | ||
| OD≥20, WT/OD≤5% | + 22.5 / -12.5 | ||
| OD≥20, WT/OD>5% | + 15.0 / -12.5 |
Length: 5800mm; 6000mm; 6096mm; 11800mm; 12000mm; and so on.
Max length: 16000mm
Keyword: High Pressure Steel Pipe, Boiler Steel Pipe, ASME SA335, P11, ASTM A335
ASTM ASME (S) A-335 / (S) A-335m เกรดและองค์ประกอบทางเคมี
องค์ประกอบทางเคมี
|
C,% |
ล้าน% |
P% |
S% |
ศรี% |
Cr% |
โม% |
|
0.05-0.15 |
0.30-0.60 |
0.025 สูงสุด |
0.025 สูงสุด |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
สมบัติทางกล
|
ความต้านทานแรงดึง MPa |
ผลผลิตแรง MPa |
ยืด% |
|
415 นาที |
205 นาที |
30 นาที |
| เกรด | UNS | C≤ | Mn | P≤ | S≤ | Si≤ | Cr | Mo |
| P1 | K11522 | 0.10 ~ 0.20 | 0.30 ~ 0.80 | 0.025 | 0.025 | 0.10 ~ 0.50 | - | 0.44 ~ 0.65 |
| P2 | K11547 | 0.10 ~ 0.20 | 0.30 ~ 0.61 | 0.025 | 0.025 | 0.10 ~ 0.30 | 0.50 ~ 0.81 | 0.44 ~ 0.65 |
| P5 | K41545 | 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 | 4.00 ~ 6.00 | 0.44 ~ 0.65 |
| P5B | K51545 | 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 1.00 ~ 2.00 | 4.00 ~ 6.00 | 0.44 ~ 0.65 |
| P5c | K41245 | 0.12 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 | 4.00 ~ 6.00 | 0.44 ~ 0.65 |
| P9 | S50400 | 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 ~ 1.00 | 8.00 ~ 10.00 | 0.44 ~ 0.65 |
| P11 | K11597 | 0.05 ~ 0.15 | 0.30 ~ 0.61 | 0.025 | 0.025 | 0.50 ~ 1.00 | 1.00 ~ 1.50 | 0.44 ~ 0.65 |
| P12 | K11562 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 | 0.80 ~ 1.25 | 0.44 ~ 0.65 |
| P15 | K11578 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 1.15 ~ 1.65 | - | 0.44 ~ 0.65 |
| P21 | K31545 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 | 2.65 ~ 3.35 | 0.80 ~ 1.60 |
| P22 | K21590 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 | 0.025 | 0.50 | 1.90 ~ 2.60 | 0.87 ~ 1.13 |
| P91 | K91560 | 0.08 ~ 0.12 | 0.30 ~ 0.60 | 0.020 | 0.010 | 0.20 ~ 0.50 | 8.00 ~ 9.50 | 0.85 ~ 1.05 |
| P92 | K92460 | 0.07 ~ 0.13 | 0.30 ~ 0.60 | 0.020 | 0.010 | 0.50 | 8.50 ~ 9.50 | 0.30 ~ 0.60 |
Note:
(S)A335 P91 other chemical composition are : V 0.18~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.06~0.10
(S)A335 P92 other chemical composition are : V 0.15~0.25; N 0.030~0.070; Ni ≤ 0.40; Al ≤ 0.04 ; Nb 0.04~0.09; W 1.5~2.00 ; B 0.001~0.006
Painting & Coating: Oiled or Black painted to prevent rust
