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  • TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

Precise Alignment Stainless Steel Stub Ends MSS SP-43

  • Precise Alignment Stainless Steel Stub Ends MSS SP-43
  • Precise Alignment Stainless Steel Stub Ends MSS SP-43
  • Precise Alignment Stainless Steel Stub Ends MSS SP-43
  • Precise Alignment Stainless Steel Stub Ends MSS SP-43
  • Precise Alignment Stainless Steel Stub Ends MSS SP-43
Place of Origin China
Brand Name Tobo
Certification ISO 9001:2015, SGS, BV
Model Number SS-STUBEND-SP43
Minimum Order Quantity 1 Piece
Price USD 3-58 / Piece (Depends on material and size)
Packaging Details Plywood cases or wooden pallets with waterproof wrapping, export standard
Delivery Time 10-30 days depending on quantity
Payment Terms L/C,T/T,Western Union
Supply Ability 30,000 Pieces per Month
Product Details
Product Name Precise Alignment Stainless Steel Stub Ends Application Precision Instrument Piping
Dimensional Tolerance MSS SP-43 Class A (Tight Tolerance) Standard MSS SP-43
Material Grade SS304, SS304L, SS316, SS316L Size Range 1/2 Inch To 24 Inch
Wall Thickness Sch5S To Sch160 Surface Finish Smooth Machined Surface
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Precise Alignment Fittings

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MSS SP-43 Stub End

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Tight Tolerance Pipe Fittings
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Product Description
Precise Alignment Stainless Steel Stub Ends MSS SP-43
Product Overview

The Precise Alignment Stainless Steel Stub Ends are manufactured to MSS SP-43 Class A tight tolerances, delivering the dimensional accuracy required for precision piping systems. In applications where perfect flange alignment and consistent wall thickness are essential, these stub ends minimize installation stress and ensure reliable sealing performance.

Each fitting is CNC machined after forming to achieve precise control of the flange face, bore and outside diameter. This level of accuracy allows rapid bolt hole alignment with lap joint flanges and produces joints that are free from angular misalignment and gasket stress. Manufactured from SS304 and SS316L stainless steel, our precise alignment stub ends are the preferred choice for instrumentation lines, skid mounted packages and high integrity process systems where measurement accuracy and leak tightness matter.

Specifications
Standard MSS SP-43 (Class A Tolerance)
Material Grade SS304, SS304L, SS316, SS316L
Size Range 1/2 Inch to 24 Inch
Wall Thickness Sch5S to Sch160
Machining CNC Precision Machined
Connection Type Butt Weld
Surface Finish Smooth Machined Surface
Certification ISO 9001:2015
Key Features
  • MSS SP-43 Class A tolerance ensures precise dimensional control
  • CNC machined faces guarantee accurate flange seating and alignment
  • Minimizes installation stress and gasket compression variation
  • Consistent wall thickness for uniform pressure distribution
  • Rapid bolt hole alignment reduces installation time
  • Ideal for skid packages and modular piping construction
  • Complete inspection reports with each shipment
Applications
  • Precision instrumentation and control piping
  • Skid mounted process packages
  • High integrity chemical and pharmaceutical lines
  • Modular and prefabricated piping systems
  • Semiconductor and clean process utilities
Quality Assurance

Precision manufacturing requires precision measurement. Our inspection team uses calibrated vernier calipers, bore gauges and optical measuring instruments to verify every critical dimension against MSS SP-43 Class A requirements. Each fitting is individually checked for ovality, wall thickness variation and flange face squareness. The quality management system is certified to ISO 9001:2015, and we maintain complete records for lot traceability. With a dedicated CNC machining capability and 15 years of experience in precision pipe fittings, we consistently deliver tight tolerance stub ends for demanding projects in Europe, America and Asia.

Frequently Asked Questions
Q1: What does MSS SP-43 Class A tolerance mean?
A: MSS SP-43 defines two tolerance classes for stainless steel butt weld fittings. Class A provides tighter dimensional tolerances suitable for precision applications, while Class B allows slightly wider tolerances for general service. Our precise alignment stub ends are produced to Class A.
Q2: How does precise alignment benefit installation?
A: With precise alignment fittings, the flange face is perfectly square to the pipe axis and the bore is concentric. This eliminates angular misalignment, reduces gasket stress and makes bolt hole alignment fast and effortless.
Q3: Can you machine stub ends to custom tolerances?
A: Yes. For special projects, we can machine stub ends to tighter tolerances than MSS SP-43 Class A. Please share your drawing or tolerance requirements for evaluation.
Q4: Are these fittings suitable for high purity applications?
A: Yes, SS316L precise alignment stub ends with smooth machined surfaces are suitable for high purity and clean process applications. Electropolishing can be added for semiconductor and pharmaceutical services.
Tags:

Stub End Fittings

Lap Joint Stub End

SS Stub End