What sizes of A335 P91 Seamless Pipe do you stock in Dubai?

We hold A335 P91 Seamless Pipe in the following forms and size ranges — Seamless Pipes & Tubes: 1/2" - 24" NB, SCH 40 - SCH 160 / XXS, Fittings: 1/2" - 24" butt weld fittings, WP11 / WP22 / WP91, Flanges: 1/2" - 24", 150# - 2500#, F11 / F12 / F22 / F5 / F9 / F91. Cut-to-size, profiling and kitting are available on request, and anything outside the stock range is sourced direct from the mill.

What are the equivalent grades to A335 P91 Seamless Pipe?

A335 P91 Seamless Pipe is commonly cross-referenced with X10CrMoVNb9-1, 1.4903, WP91, F91. Equivalents are nominal: send us the property that matters for your application and we will confirm the closest grade we can certify.

Is A335 P91 Seamless Pipe supplied with mill certification?

Yes. Every delivery of A335 P91 Seamless Pipe is supplied against ASTM A335 / ASME SA335, ASTM A234 (fittings), ASTM A182 (flanges), EN 10216-2, EN 10204 3.1 / 3.2 with EN 10204 3.1 mill certification and full heat-number traceability. Third-party inspection can be arranged on request.

What is A335 P91 Seamless Pipe typically used for?

A335 P91 Seamless Pipe is specified for main steam and hot reheat piping, superheater and reheater headers, refinery hot wall piping and heater coils, mainly in Power Generation, Petrochemical, Refining. Tell us the duty and we will advise whether A335 P91 Seamless Pipe or another alloy steel grade is the better fit.

A335 P91 Seamless Pipe

ASTM / ASME A335 / SA335 Grade P91EN X10CrMoVNb9-1 / 1.4903Fittings / flanges A234 WP91 / A182 F91

حالة المخزونMill indent

مدة التوريد4 - 8 weeks mill indent

Modified 9Cr-1Mo-V (P91) seamless pipe for supercritical steam. The creep strength allows a much thinner wall than P22 at 580 - 600 C, cutting weight and thermal fatigue on main steam and hot reheat lines. Hardness after PWHT is reported on every length.

Seamless, normalised and tempered to ASME SA335
Creep rupture strength for long term elevated temperature service
Matched fittings (A234 WP) and flanges (A182 F) available from one source
Hardness, hydro and ultrasonic test reports with every heat

الأشكال والمقاسات المتوفرة

الشكل	نطاق المقاسات
الأنابيب غير الملحومة و الأنابيب	1/2" - 24" NB, SCH 40 - SCH 160 / XXS
الوصلات	1/2" - 24" butt weld fittings, WP11 / WP22 / WP91
الفلنجات	1/2" - 24", 150# - 2500#, F11 / F12 / F22 / F5 / F9 / F91

التركيب الكيميائي (%)

العنصر	الحد الأدنى	الحد الأقصى
C	0.08	0.12
Cr	8.00	9.50
Mo	0.85	1.05
V	0.18	0.25
Nb	0.06	0.10
N	0.030	0.070

الخصائص الميكانيكية

الخاصية	القيمة	الوحدة
Yield Strength (0.2%)	415 min	MPa
Tensile Strength	585 min	MPa
Elongation	20 min (longitudinal)	%
Condition	Normalised and tempered, seamless	-

الخصائص الفيزيائية

الخاصية	القيمة	الوحدة
Density	7.85	g/cm3
Max Service Temperature	550 - 650 depending on grade	C

التطبيقات النموذجية

Main steam and hot reheat piping

Superheater and reheater headers

Refinery hot wall piping and heater coils

High temperature process lines

أسئلة متكررة

[ 02 ] درجات أخرى في الفولاذ السبائكي

AISI 4140 / 42CrMo4

Ex-stock Dubai

AISI 4140EN 42CrMo4 / 1.7225

الفولاذ الهندسي الكروم-الموليبدينوم من خلال التقسية. يجمع بشكل ممتاز بين القوة والمتانة وقابلية التشغيل الآلي في الحالة المروية والمقساة.

3 شكل متوفر

AISI 4340 / 34CrNiMo6

Mill indent

AISI 4340EN 34CrNiMo6 / 1.6582

الفولاذ النيكل-كروم-مولبيدنيوم مع قابلية التصليد العالية جداً والمتانة في المقاطع الثقيلة، يُختار لأجزاء الآلات الأكثر إجهاداً.

2 شكل متوفر

SA387 Grade 11 Class 2

Mill indent

ASTM / ASME A387 / SA387 Grade 11 Class 2EN 13CrMoSi5-5 / 1.7336

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.

3 شكل متوفر

SA387 Grade 12 Class 2

Mill indent

ASTM / ASME A387 / SA387 Grade 12 Class 2EN 13CrMo4-5 / 1.7335

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.

3 شكل متوفر

SA387 Grade 22 Class 2

Mill indent

ASTM / ASME A387 / SA387 Grade 22 Class 2EN 10CrMo9-10 / 1.7380

2.25Cr-1Mo pressure vessel plate — the refinery standard for hydroprocessing. The higher chromium and molybdenum push the Nelson curve limit well above Grade 11, which is why reactors, separators and hot wall equipment in hydrogen service specify it.

3 شكل متوفر

SA387 Grade 5 Class 2

Mill indent

ASTM / ASME A387 / SA387 Grade 5 Class 2EN X12CrMo5 / 1.7362

5Cr-0.5Mo plate. The chromium level lifts resistance to sulphidic corrosion and high temperature oxidation, so Grade 5 is specified for crude and vacuum unit hot sections where naphthenic and sulphur attack dominate.

3 شكل متوفر

تحميل البيانات الفنية EN