Weld neck flanges
BLD Forged Solutions
Standard Forged Flanges from China
Standard flange RFQs are reviewed by flange type, standard, size, pressure class, facing, material grade, quantity, inspection documents and destination country.
Sales Engineering Review
Send drawings, standards, material grades, quantity and inspection requirements directly for project sales review.
Product Scope
Use this section to confirm whether the RFQ belongs on this product page before sending drawings or line-item details.
Slip-on flanges
Socket weld flanges
Threaded flanges
Lap joint flanges
Standard blind flanges
Raised face and flat face flanges
RTJ flange requirements by project
Procurement Terms
Common product wording is grouped here so purchase lists, drawings and project specifications can be matched to the correct RFQ route.
standard flange manufacturerstandard forged flange Chinastandard flanges supplierASME standard flangeEN DIN standard flangeGOST standard flangecarbon steel standard flangestainless steel standard flange
Also Known As
Buyers use different names for the same forged product family. These terms often appear in drawings, purchase lists and supplier shortlists.
standard flangestandard forged flangepipe flangeindustrial steel flange
Common Standards
Standards are checked against the drawing, project specification and requested inspection route.
- ASME B16.5 Class 150 to 2500
- ASME B16.47 for large diameter drawing review
- EN 1092-1 / DIN PN flanges
- GOST 33259, 12820 and 12821
- Project drawings and customer specifications
Material Grades
Material review confirms grade, service condition, heat treatment and certificate expectations before quotation.
ASTM A105 / A105N carbon steel
ASTM A350 LF2 low-temperature steel
Stainless steel 304, 316, 321 and 347
Alloy steel and duplex grades by project
Nickel alloy requests subject to drawing and feasibility review
Size, Pressure, Class and Drawing Review Points
These items help prevent missing technical details during the first quotation review.
Flange type and standard
NPS / DN and class / PN
Facing, bore and bolt pattern
Material grade and heat treatment
Quantity, packing and destination country
MTC 3.1, dimensional and NDT requirements
Manufacturing Route
The practical route is reviewed before price and lead time are confirmed.
- Material review
- Forging route confirmation
- Heat treatment
- Rough machining
- Final machining
- Inspection and document review
- Marking, packing and export document preparation
Inspection and Documents
Inspection requirements should be included with the RFQ so document cost and timing are clear early.
MTC EN 10204 3.1
Heat treatment record
Dimensional report
PMI when alloy verification is required
UT, MT or PT when specified
Tensile, impact or hardness test records when required
Third-party inspection support by project request
RFQ Checklist
Include these details when sending the first message.
Flange type
Standard
Size
Class / PN
Facing
Bore
Material
Quantity
Inspection document
Destination
Packing requirement
Common Buyer Mistakes
These points often cause repeated clarification or delayed quotation.
- Sending a product name without standard, drawing or pressure rating
- Leaving bore, facing or bolt pattern unclear
- Mixing DN, NPS, PN and class references without a drawing
- Omitting inspection documents until after price discussion
- Forgetting destination country, packing or third-party inspection requirements
FAQ
Short answers for common RFQ questions.
Can you review Standard Flanges by drawing?
Yes. Send the latest drawing revision with material, quantity, tolerance, inspection and destination requirements so the RFQ can be checked before quotation.
What information is needed before quotation?
A practical RFQ should include standard or drawing, size, pressure rating, material grade, quantity, inspection requirements and destination country.
Which materials are common for Standard Flanges?
Common requests include ASTM A105, A350 LF2, stainless steel, duplex steel and project-specified alloy grades, subject to drawing and service requirements.
Can inspection documents be arranged?
MTC 3.1, dimensional reports, heat treatment records, PMI, UT, MT, PT and third-party inspection can be reviewed according to the project requirement.
Send your RFQ or drawing directly to BLD Forge Direct.
Email [email protected] with standard, drawing, material, quantity and inspection requirements.