وصف
Pipeline isolation line blank
ASTM A240 304L مشهد شفة عمياء
ان ASTM A240 304L spectacle blind is a machined figure-8 line blank for open-or-closed pipeline isolation in general stainless process service.
What is a 304L spectacle blind flange?
This component combines a solid blind and an open spacer in one rotating figure-8 plate. Its visible position helps operators confirm whether the line is isolated or open.
304L offers low-carbon weldability and broad general corrosion resistance. Use 316L or duplex grades when the service requires higher localized-corrosion resistance.
304L spectacle blind flange specifications
| منتج | spectacle blind flange |
|---|---|
| مادة | 304ل / UNS S30403 / EN 1.4307 |
| مواصفات المواد | ASTM A240 Type 304L |
| معيار الأبعاد | ASME B16.48 |
| اتصال / form | Figure-8 line blank installed between mating flanges |
| Size and rating | ASME sizes and pressure classes subject to the selected material, facing and standard limits |
| سطح / end detail | Raised-face or ring-joint-compatible finish as ordered |
| Manufacturing route | Plate cutting, التصنيع باستخدام الحاسب الآلي, facing and identification |
| وثائق التفتيش | EN 10204 3.1 إم تي سي, dimensional report and additional testing when specified |
أبعاد, tolerances and acceptance criteria follow the standard edition and project documents named on the purchase order. Published ranges are enquiry guidance, not a pressure-temperature design approval.
Material and dimensional standards
مواصفات المواد
ASTM A240 Type 304L is a plate material with UNS S30403. EN 1.4307 is a commonly referenced European grade, subject to the ordered specification.
Product dimensions
ASME B16.48 defines line blanks used between flanges. The ordered pressure class, facing and dimensional details must match the mating flange system.
Typical applications and selection boundary
Applications are examples only. Confirm corrosion resistance, حدود درجة الحرارة, impact properties and code compliance for the actual service.
تصنيع, التفتيش والتوثيق
SASA FLANGE can supply this product with identification linked to the raw-material heat. The agreed inspection and documentation plan is controlled by the purchase order.
Heat-number control and material certificate review.
القطر الخارجي, تتحمل, سماكة, web, facing and surface finish.
مؤشر مديري المشتريات, حزب العمال, يوتا, hardness or third-party inspection when specified.
EN 10204 3.1 MTC and ordered inspection reports.
قائمة مراجعة طلب عرض الأسعار (RFQ).
- Material grade and specification
- معيار الأبعاد والإصدار
- الحجم الاسمي
- Quantity and destination
- إم تي سي, تجربة الاقتراب من الموت ومتطلبات التفتيش من طرف ثالث
- فئة الضغط
- Facing type and finish
- Mating flange details
الأسئلة المتداولة
What should be included in an RFQ for a 304L spectacle blind flange?
State the material specification, معيار الأبعاد والطبعة, مقاس, pressure class or wall thickness, end or facing detail, كمية, inspection requirements and delivery destination.
Can a 304L spectacle blind flange be supplied with EN 10204 3.1 الوثائق?
نعم. EN 10204 3.1 material certification and heat-number traceability can be supplied. مؤشر مديري المشتريات, تجربة الاقتراب من الموت, dimensional reporting or third-party inspection should be stated on the purchase order.
Is 304L suitable for every corrosive service?
لا. Grade selection depends on the fluid chemistry, مستوى الكلوريد, درجة حرارة, ضغط, fabrication route and governing design code. The project engineer should confirm service suitability.
طلب عرض أسعار
إرسال المعيار, مادة, مقاس, rating or wall thickness, quantity and inspection requirements for a technical and commercial review.
