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Nickel alloy pipes become necessary when process conditions exceed what stainless steel can handle—temperatures above 800°F, reducing acid environments, high chloride concentrations preventing stress corrosion cracking (SCC) failure, or hydrogen service applications where hydrogen embrittlement is a concern.

The key difference: A312 includes seamless pipe for smaller diameters and higher pressures, while A358 focuses on welded pipe for large-diameter applications.

Hastelloy C276 is the better alloy for pure seawater corrosion resistance, and Inconel 625 is the better alloy overall for a balanced combination of corrosion performance, mechanical properties, versatility, and cost-effectiveness in marine service.

Super duplex F53 is one of the most sought-after alloys in demanding industrial environments, but it also raises a lot of questions. This FAQ breaks down everything you need to know.

A Brazilian industrial client recently completed a successful procurement cooperation with our company. They purchased a full set of super duplex stainless steel pipe fittings—including elbows, pipe bends, and a concentric reducer—manufactured to ASTM A815 UNS S32750 (also known as 2507 super duplex), for use in demanding oil & gas and petrochemical pipeline systems. The goods were shipped via sea freight to the Port of Santos, Brazil.

Home › Pipe & Fittings › Steel Reducer vs Swage NipplePipe Fittings GuideSteel Reducer vs Swage Nipple: What's the Difference?Category: Pipe & Fittings  ·  8 min read  ·  Updated April 2026 Both steel reducers and swage nipples connect pipes of different sizes — but they are not the same part. Choos

Short answer: No — not safely, and not for long. If you are specifying pipe for a 98% sulfuric acid system and you are considering 316H/UNS S31609, this article will explain why that is a dangerous choice, what actually happens to stainless steel in 98% concentrated sulfuric acid, and which alloys genuinely work in this service.

This guide gives you the numbers: wall thickness, inside diameter and weight for every size from 1/8 in to 12 in NPS, maximum allowable working pressures for carbon steel, stainless steel, duplex, super duplex and PVC, the equation behind those pressures, how temperature derates them, indicative prices, and the standards that govern what you actually receive. All pressure figures are calculated with the ASME B31.3 thin wall hoop stress equation and are for estimating; your engineer of record must confirm them against the code edition and the mill certificate for the heat you buy.

Specify 254SMO when chloride pitting/SCC is the dominant risk (PRE ≥ 40 is the accepted threshold for continuous seawater); specify 904L when reducing-acid resistance is the dominant requirement and continuous seawater immersion is not involved.