{"id":31519,"date":"2026-06-23T14:08:46","date_gmt":"2026-06-23T06:08:46","guid":{"rendered":"https:\/\/alllandpipes.com\/?p=31519"},"modified":"2026-06-23T14:26:34","modified_gmt":"2026-06-23T06:26:34","slug":"astm-a671-vs-a672-steel-pipes-differences","status":"publish","type":"post","link":"https:\/\/alllandpipes.com\/es\/blogs\/astm-a671-vs-a672-steel-pipes-differences.html","title":{"rendered":"Selecting Steel Pipes for High-Temperature & Low-Temperature Service: ASTM A671 vs. ASTM A672"},"content":{"rendered":"
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Introducci\u00f3n<\/strong><\/h2>\n\n

Extreme temperature industrial pipelines used in oil and gas, power generation, low temperature storage and municipal infrastructure rely on durable welded steel pipe to resist hot cracking and pressure-induced deformation. All heavy-duty pipeline projects require strict compliance with standardized carbon steel pipe specifications<\/strong>, because sub-zero brittleness and high-temperature creep are two common causes of failure under extreme working conditions. It is very important for project engineers and purchasing teams to distinguish between ASTM A671\u00a0and ASTM A672\u00a0EFW pipeline standards, because both standards are widely manufactured and supplied by qualified carbon steel pipeline manufacturers around the world.<\/p>\n\n

These two EFW pipe standards both adopt plate-formed submerged arc welding to produce premium Tubos de acero LSAW<\/a><\/strong>, yet they are engineered for completely different temperature scenarios. ASTM A671<\/a> focuses on low-temperature impact toughness, while ASTM A672\u00a0aims at high pressure and medium and high temperature stability. This article clarifies their differences in material grades, heat treatment, testing protocols and application scenarios and guides users to select compliant pipe specifications and reliable pipe manufacturers for extreme-temperature pipeline projects.<\/p>\n\n

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1<\/span>Introducci\u00f3n<\/a><\/span><\/div>\n
2<\/span>1. Understanding ASTM A671: EFW Steel Pipe for Low-Temperature Service<\/a><\/span><\/div>\n
3<\/span>2. Understanding ASTM A672: EFW Steel Pipe for High-Pressure and Moderate-to-High Temperature Service<\/a><\/span><\/div>\n
4<\/span>3. Key Differences: ASTM A671\u00a0vs. ASTM A672<\/a><\/span><\/div>\n
5<\/span>4. Manufacturing Processes of EFW & LSAW Steel Pipe<\/a><\/span><\/div>\n
6<\/span>5.\u00a0How to Select a Qualified Carbon Steel Pipe Manufacturer<\/a><\/span><\/div>\n
7<\/span>6. Frequently Asked Questions (FAQ)<\/a><\/span><\/div>\n
8<\/span>7. Conclusi\u00f3n<\/a><\/span><\/div>\n<\/div>\n<\/div>\n\n
\"astm<\/div>\n\n

1. Understanding ASTM A671: EFW Steel Pipe for Low-Temperature Service<\/strong><\/h2>\n\n

1.1 Scope & Design Purpose<\/strong><\/h3>\n\n

ASTM A671 covers electric-fusion-welded steel pipe intended for atmospheric and lower-temperature service where notch toughness is required. The core design gives priority to the low-temperature notch toughness to avoid brittle fracture in the sub-zero environment. This standard is applicable to large-diameter pipelines of NPS 16 and above, with a minimum wall thickness of 6 mm, and is widely used in low-temperature industrial systems.<\/p>\n\n

As a mainstream product of professional carbon steel pipe manufacturer<\/strong>s’ facilities, ASTM A671 EFW steel pipe is commonly manufactured using plate-forming and submerged arc welding processes, including JCOE and other longitudinal welding methods. Its strict chemical impurity control can effectively prevent microcrack propagation under low-temperature thermal shock, which is in line with international cold service pipe specifications.<\/p>\n\n

1.2 Common Grades & Heat Treatment Classes<\/strong><\/h3>\n\n

The ASTM A671\u00a0grades correspond to specific pressure vessel steel plates and conform to the unified industrial pipeline specifications.<\/p>\n\n