توريد الطاقة وتحلية المياه في Qatar

الدرجة الدوبلكس الأكثر استخدامًا. يقارب ضعف قوة الخضوع للـ 316L، مما يسمح بأقسام أرق وأخف وزنًا مع توفير مقاومة أفضل بكثير للتآكل الناتج عن إجهاد الكلوريد.

سبائك النيكل-الكروم-الموليبدينوم معززة بالنيوبوميوم. قوة استثنائية ومقاومة للتآكل من درجات الحرارة منخفضة جدًا إلى 980 م دون معالجة حرارية.

The baseline transmission grade. X52 balances weldability against pressure rating, which is why it remains the default for gathering lines, utility piping and plant interconnects where wall thickness rather than yield strength drives the design.

فائق الدوبلكس مع PREN أعلى من 40 لأشد بيئات مياه البحر والخدمات الحامضية. يضيف S32760 (Zeron 100) التنغستن والنحاس لتعزيز مقاومة الأحماض.

Weathering structural plate. Copper, chromium and nickel additions let a dense, adherent oxide patina form that seals the surface, so the structure can be left unpainted and the maintenance coating cycle disappears.

سبيكة نيكل-كروم-حديد بالمحلول الصلب مع مقاومة عالية للأكسدة والكربنة وتكسير إجهاد أيونات الكلوريد في التآكل عند درجات حرارة مرتفعة.

Carbon pressure vessel plate for moderate and lower temperature service. The lower carbon of Grade 60 gives better formability and weldability than Grade 70, which suits cold-formed heads, thin shells and plant where notch toughness matters more than tensile strength.

سبيكة من النيكل والموليبدينوم والكروم مع التنجستن، تعتبر السبيكة الأكثر مقاومة للتآكل المتوفر في جميع الوسائط المؤكسدة والمختزلة.

The default carbon pressure vessel plate. Grade 70 carries the highest tensile of the SA516 family, and for sour service it is supplied with controlled sulphur, calcium treatment and HIC / SSC testing so wet H2S equipment can be built from a qualified plate rather than an upgrade alloy.

Iron-nickel-chromium alloy for high temperature strength with oxidation and carburisation resistance. The 32Ni-21Cr balance resists chloride stress corrosion cracking that austenitic stainless suffers, which is why it is standard for process heater and reformer tubing.

The creep-optimised version of Alloy 800. Controlled carbon plus a combined aluminium and titanium window of 0.85 - 1.20% gives far better creep rupture strength above 600 C, so 800HT is the grade for the hottest reformer and pigtail service rather than plain 800.

Nickel-chromium-cobalt-molybdenum alloy for the extreme end of high temperature service. Solid solution strengthening keeps useful creep strength to 1100 C while the chromium and aluminium give oxidation resistance, so 617 is used where 800HT and stainless are long past their limit.

Precipitation-hardened nickel alloy developed for advanced ultra-supercritical boilers. Gamma-prime strengthening plus about 25% chromium holds creep rupture strength and coal-ash corrosion resistance at 750 C and above, which is beyond what 617 can carry in thick section steam headers.

التيتانيوم النقي تجارياً، العمود الفقري للصناعة. مقاوم تماماً لمياه البحر والكلوريدات المؤكسدة مع قابلية تشكيل ولحام ممتازة.

The default seawater alloy. 90% copper with 10% nickel and a controlled iron addition builds a protective cuprous oxide film in seawater, and the inherent copper toxicity stops macrofouling — barnacles and mussels do not settle, so cooling lines stay clean without chlorination. Specified for ship and platform seawater systems, firewater ring mains and condenser tubing where the velocity stays below about 3.5 m/s.

فولاذ مقاوم للصدأ أوستنيتي يحتوي على الموليبدينوم. إضافة 2-3% من الموليبدينوم تُحسن مقاومة التنقر في الوسائط المحتوية على الكلوريد، مما يجعل 316L الدرجة الأساسية للخدمة البحرية والكيميائية في الخليج.

The higher-duty cupro nickel. Tripling the nickel to 30% raises strength, erosion-corrosion resistance and the allowable seawater velocity to around 4.5 m/s, and lifts the service temperature well above 90/10. It is the grade for pump and valve-adjacent piping, hot brine and MSF desalination heat recovery, and any line where turbulence or sand loading would strip the film off 90/10.

درجات الأوستنيتي المثبتة بالتيتانيوم والنيوبوم. الإضافة المثبتة ترتبط بالكربون بحيث تقاوم الفولاذ التآكل بين الحبيبات بعد التعرض المطول في نطاق التحسس 425-815 مئوية.

The desalination variant of 70/30. Raising iron and manganese to about 2% each stabilises the protective film under high velocity, sand-laden and partly deaerated brine, which is exactly the duty inside MSF evaporator heat recovery and reject sections. Where 70/30 tubes thin at the inlet ends, C71640 holds.

The high-temperature austenitic. 25Cr-20Ni gives scaling resistance to around 1035 C in continuous service, so 310S is the grade for furnace internals, radiant tubes and anything that lives in flue gas rather than in water.

1.25Cr-0.5Mo-Si pressure vessel plate. The silicon addition improves oxidation resistance, making Grade 11 the common choice for hot wall vessels and hydrogen service up to around 550 C where full 2.25Cr strength is not required.

A molybdenum-up step on 316L. Raising Mo to 3 - 4% lifts PREN to around 30, which buys real margin against pitting and crevice attack in pulp, scrubber and chloride service where 316L is borderline but duplex is more than the duty needs.

1Cr-0.5Mo pressure vessel plate. The economical Cr-Mo grade for moderate temperature pressure parts, widely used for separator and drum shells where creep and hydrogen resistance are needed but the duty is below the 2.25Cr range.

Titanium-stabilised 316. The titanium ties up carbon so the steel keeps its intergranular corrosion resistance after long exposure in the 425 - 815 C sensitisation range, and it holds higher creep strength than 316L in hot service.