يحكم ASTM A234 تجهيزات اللحام الطرفي؛ ويحكم ASTM A182 الفلنجات. فهم نوع الدرجة والضغط ومرجع SAMSS لأرامكو المناسب لفئة الأنابيب لديك يمنع أخطاء المواصفات ورفض المواد عند الفحص.
ASTM A234 — Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service — covers elbows, tees, reducers, caps, and other butt-weld fittings manufactured by forming (not casting) from pipe or plate material.
For Saudi Aramco projects, A234 WPB fittings are specified in the vast majority of carbon steel piping classes. The applicable Aramco internal standard is 02-SAMSS-005 (Carbon Steel Butt-Weld Fittings), which references A234 WPB as the primary material requirement for general carbon steel service.
For alloy steel service (high-temperature, high-pressure, or corrosive applications), alloy grades WP11, WP22, WP5, and WP9 are specified. These correspond to the Cr-Mo alloy steel grades commonly used in hot service piping systems.
| درجة ASTM A234 | المادة | أدنى خضوع (MPa) | نطاق الحرارة | استخدام أرامكو |
|---|---|---|---|---|
| WPB | فولاذ كربوني | 240 MPa | -29°C to 538°C | أنابيب CS قياسية — الأكثر شيوعاً |
| WPC | فولاذ كربوني عالي القوة | 275 MPa | -29°C to 538°C | متطلبات قوة عالية |
| WPL6 | فولاذ كربوني درجات حرارة منخفضة | 275 MPa | -46°C to 345°C | خدمة الطقس البارد، LNG، التبريد |
| WP11 Cl.1 | 1¼Cr–½Mo | 205 MPa | -29°C to 593°C | درجات حرارة مرتفعة / خدمة H2 |
| WP22 Cl.1 | 2¼Cr–1Mo | 205 MPa | -29°C to 649°C | درجات حرارة عالية، أنابيب الهيدروكراكر |
| WP5 | 5Cr–½Mo | 205 MPa | -29°C to 649°C | النافثا، الخدمة التآكلية |
| WP304L | 304L SS | 170 MPa | -268°C to 538°C | غير قابل للصدأ |
| WP316L | 316L SS | 170 MPa | -268°C to 538°C | غير قابل للصدأ / خدمة الكلوريد |
يستلزم تحديد مواصفات أي وصلة أو شفة لمشتريات SAEP-347 تأكيد ستة معاملات: مواصفة ASTM للمادة (A105N أو A182 F316L أو A234 WPB أو A403 WP316L)، والمعيار ASME الأبعادي (B16.5 أو B16.9 أو B16.11 أو B16.47)، وفئة الضغط أو جدول الجدار، والمقاس الاسمي بالإنش، ونوع نهاية التوصيل (BW أو SW أو THD أو RF أو RTJ)، ورقم مادة الملحق 4 من SAEP-347. يقدم مهندسو Gulf Union Ozone المساعدة في تأكيد المواصفات والتوثيق.
ASTM A182 — Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service — covers flanges produced by forging or rolling, as distinct from A234's wrought/formed products.
A182 flanges are specified to ASME B16.5 (NPS ½" to 24", Class 150–2500) and ASME B16.47 (NPS 26" and above). The applicable Aramco internal standard for flanges is 02-SAMSS-011.
Note: Carbon steel flanges for standard Aramco service are typically specified to ASTM A105 (forgings) rather than A182 — A182 grades are the alloy steel and stainless steel flange grades. When a piping class specifies "A182 F304L flanges" it means 304L stainless steel weld-neck flanges; "A182 F11 flanges" means 1¼Cr-½Mo alloy steel flanges.
| درجة ASTM A182 | المادة | الاستخدام النموذجي |
|---|---|---|
| F11 | 1¼Cr–½Mo Alloy Steel | خدمة درجات الحرارة المرتفعة |
| F22 | 2¼Cr–1Mo Alloy Steel | درجات حرارة عالية، خدمة H2 |
| F304L | 304L Stainless Steel | أنابيب غير قابل للصدأ قياسية |
| F316L | 316L Stainless Steel | خدمة الكلوريد / البحر |
| F51 | Duplex 2205 (UNS S31803) | مياه البحر، المياه المنتجة |
| F53 | Super Duplex 2507 (S32750) | خدمة الكلوريد العالي |
| F42 | Carbon Steel LTCS | خدمة درجات الحرارة المنخفضة |
| F91 | 9Cr–1Mo–V Alloy Steel | خدمة درجات حرارة عالية جداً |
Three of the most common specification queries Gulf Union Ozone receives involve confusion between these three standards. Here is the quick answer:
For: Flanges (weld neck, slip-on, blind, socket weld) in standard carbon steel service. Also covers socket weld and threaded fittings (ASME B16.11).
Not for: Butt-weld fittings (use A234 WPB instead). Not for alloy service.
For: Butt-weld elbows, tees, reducers, caps in standard carbon steel piping. ASME B16.9 dimensions.
Not for: Flanges (use A105 or A182). Not for socket weld or threaded fittings.
For: Stainless steel flanges (and forged fittings) where A105 is not suitable — chloride service, high-temperature alloy, duplex grades.
Note: F304L = 304L SS flanges; F316L = 316L SS flanges; F51 = duplex 2205 flanges.
For a standard carbon steel piping class (SAES-L-105 Class A1A, for example): Flanges = ASTM A105, Butt-weld fittings = ASTM A234 WPB. When you see "A182" on an Aramco P&ID or piping class, it signals an alloy steel or stainless steel piping class — the specific F-grade tells you which alloy. Both the A234 and A182 materials must comply with ASME B16.9 / B16.5 dimensional requirements and 02-SAMSS-005 / 02-SAMSS-011 quality requirements for Aramco supply.
Gulf Union Ozone stocks products meeting the specifications of the following SAEP-347 Annex 4 fitting and flange material numbers:
Saudi Aramco project specifications frequently call for piping components to be sourced from vendors on the Approved Vendor List (AVL) for the applicable SAMSS number. For SAEP-347 Annex 4 piping components, the relevant SAMSS numbers include SAMSS-001 (piping fittings), SAMSS-002 (flanges and pressure fittings), SAMSS-005 (pipe), and SAMSS-012 (valves). Gulf Union Ozone supplies SAEP-347 compatible components traceable to manufacturers listed on the Aramco AVL for each applicable SAMSS. When an EPC contractor requires dual certification — compliance with both the ASTM product standard and EN 10204 3.1 material certification — Gulf Union Ozone satisfies both requirements from approved European and North American manufacturers whose material test certificates carry the required mill inspector counter-signature. SAEP-347 Annex 4 material number reference is included on all Gulf Union Ozone quotations and delivery notes.
توفر غلف يونيون أوزون تجهيزات اللحام الطرفي ASTM A234 وفلنجات ASTM A105/A182 من مستودع جدة مع شهادات اختبار وشهادات مطابقة كاملة. أرسل لنا قائمة المواد مع الأحجام والجداول الزمنية والكميات لتحصل على عرض سعر في نفس اليوم.
Gulf Union Ozone fitting and flange specification support is available to procurement engineers, piping engineers, and QC inspectors at Saudi Aramco EPC contractors, operating companies, and maintenance organisations. Technical queries — grade equivalence, SAEP-347 Annex 4 material number lookup, EN 10204 certificate type determination, and dimensional standard clarification — are answered within 24 hours. Bulk piping component supply from a single Gulf Union Ozone purchase order simplifies vendor management for Saudi Aramco material requisitions covering pipe, fittings, flanges, and valves from one trusted source. Delivery from the Jeddah warehouse: Jubail and Dammam 48–72 hours; Riyadh 72–96 hours; Al Khobar and Yanbu 72 hours; Jeddah same-day collection. EN 10204 3.1 certificates, SAEP-347 cross-reference, and Aramco vendor number documentation are provided on every delivery note.