American Standard Low Temperature Seamless Pipe ASTM A333 ASME SA333
ASTM A333 and ASME SA333 low-temperature seamless pipes are manufactured using carbon or alloy steel materials. These pipes are produced with a seamless construction, ensuring uniformity and structural integrity. The seamless manufacturing process eliminates the need for welding, reducing the risk of defects and improving the overall strength of the pipes. They are available in different grades and sizes to suit specific application requirements.
ASTM Scope:
This specification covers nominal (average) wall carbon and alloy steel pipe intended for use at low temperatures and in other applications requiring notch toughness. Several grades of ferritic steel are included as listed in Table 1. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse effect on impact properties.
Product Knowledge:
This ASTM specification is written so that the end user and the manufacturer can agree upon, and clearly understand, the properties and capabilities of the piping product being supplied. In contrast with national codes (like API, ASME or CSA), ASTM A333 is rarely stipulated by national or state-level legal requirements.
There are several grades in A333, each with different steelmaking approach to improve the steel’s impact properties at lower temperatures. Several grades have nickel (Ni) additions, and are capable of high toughness at cryogenic temperatures as low as -320F (-195C). Many of these grades would be considered rare, and in the experience of Bri-Steel, they are expensive to procure and may be difficult to find a capable fabricator with an proven weld procedure. The exception to this is Gr6, which is quite common and is regularly stocked in colder regions of North America. A333 Gr6 has proven impact toughness at -50F (-45C), and is commonly used in applications where the piping is exposed directly to cold environments during construction and/or in operation.
Chemical Composition (%) of ASTM A333 steel pipe
Grade | Chemical Composition (%) | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | Al | |
Grade 1 | ≤0.30 | 0.40-1.06 | ≤0.025 | ≤0.025 | |||||||
Grade 3 | ≤0.19 | 0.18-0.37 | 0.31-0.64 | ≤0.025 | ≤0.025 | 3.18-3.82 | |||||
Grade 4 | ≤0.12 | 0.18-0.37 | 0.50-1.05 | ≤0.025 | ≤0.025 | 0.44-1.01 | 0.47-0.98 | 0.40-0.75 | 0.04-0.30 | ||
Grade 6 | ≤0.30 | ≥0.10 | 0.29-1.06 | ≤0.025 | ≤0.025 | ||||||
Grade 7 | ≤0.19 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 2.03-2.57 | |||||
Grade 8 | ≤0.13 | 0.13-0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 8.40-9.60 | |||||
Grade 9 | ≤0.20 | 0.40-1.06 | ≤0.025 | ≤0.025 | 1.60-2.24 | 0.75-1.25 | |||||
Grade 10 | ≤0.20 | 0.10-0.35 | 1.15-1.50 | ≤0.03 | ≤0.015 | ≤0.15 | ≤0.25 | ≤0.015 | ≤0.50 | ≤0.12 | ≤0.06 |
Grade 11 | ≤0.10 | ≤0.35 | ≤0.6 | ≤0.025 | ≤0.025 | ≤0.50 | 35.0-37.0 | ≤0.50 |
Production specification range of low temperature pipe products
No. | Order No. | Size description | ||
O.D. | W.T. | Legnth | ||
/mm | /mm | /m | ||
1 | 10~127 | 1~20 | 6~12.0 | |
42~114.3 | 3.5~6 | 6~12.2 | ||
42~114.3 | 6~12 | 6~12.2 | ||
114.3~180 | 3.8~8 | 6~12.2 | ||
A333 Gr.6 | 114.3~180 | 8~22 | 6~12.2 | |
A333 Gr.6/X42NS | 68~180 | 10~14 | 6~12.2 | |
69~254 | 14~55 | 6~12.2 | ||
140~340 | 6~8 | 6~12.2 | ||
140~368 | 8~42 | 6~12.2 | ||
318~720 | 14~50 | 4~12.5 | ||
2 | A333 Gr.6/X52QS | 42~114.3 | 3.5~12 | 6~12.2 |
114.3~180 | 3.8~22 | 6~12.2 | ||
68~254 | 10~40 | 6~12.2 | ||
140~368 | 6~40 | 6~12.2 | ||
318~720 | 14~40 | 4~12.5 | ||
140~368 | 6~25 | 6~12.2 | ||
318~720 | 14~25 | 4~12.5 | ||
3 | 16MnDG | 10~127 | 1~20 | 6~12.0 |
42~114.3 | 3.5~12 | 6~12.2 | ||
114.3~180 | 3.8~22 | 6~12.2 | ||
68~254 | 10~55 | 6~12.2 | ||
140~368 | 6~42 | 6~12.2 | ||
318~720 | 14~120 | 4~12.5 |