Need a Help?
Choose your Stainless Steel Flange with best reputable.
+86 18958822378
nathan979f@gmail.com
Introduction
SANS 1123:2017 – Steel Pipe Flanges for the Petrochemical and General Industry
The South African National Standard SANS 1123:2017 specifies the dimensions, pressure ratings, facing types, and tolerances of steel pipe flanges used in general engineering, waterworks, and petrochemical industries. It covers nominal sizes (DN) from small to large diameters, with pressure designations such as PN 6, PN 10, PN 16, PN 25, and PN 40.
The standard defines various flange facing forms (e.g., flat face, raised face, spigot and socket) and ensures interchangeability within South African manufacturing and supply. SANS 1123 is widely applied in the local market and maintains consistency with certain older BS 10 tables while adapting to South African industrial requirements.
Catalog
- Figure 1
- Figure 2 — Key to tables 250/2 to 6400/3
- Table 250/2 — Steel welding neck flanges
- Table 250/3 — Steel plate flanges for welding
- Table 600/1A — integral steel flanges
- Table 600/1B — Integral cast iron flanges
- Table 600/2 — Steel welding neck flanges
- Table 600/3 — Steel plate flanges for welding
- Table 600/4 — Steel screwed boss flanges
- Table 600/5 — Steel slip-on boss flanges for welding
- Table 600/8 — Steel plate blank flanges
- Table 1000/1A — Integral steel flanges
- Table 1000/1B — Integral iron flanges
- Table 1000/2 — Steel welding neck flanges
- Table 1000/3 — Steel plate flanges for welding
- Table 1000/4 — Steel screwed boss flanges
- Table 1000/5 — Steel slip-on flanges for welding
- Table 1000/8 — Steel plate blank flanges
- Table 1600/1A — Integral steel flanges
- Table 1600/1B — Integral iron flanges
- Table 1600/2 — Steel welding neck flanges
- Table 1600/3 — Steel plate flanges for welding
- Table 1600/4 — Steel screwed boss flanges
- Table 1600/5 — Steel slip-on boss flanges for welding
- Table 1600/8 — Steel plate blank flanges
- Table 2500/1A — Integral steel flanges
- Table 2500/1B — Integral iron flanges
- Table 2500/2 — Steel welding neck flanges
- Table 2500/3 — Steel plate flanges for welding
- Table 2500/4 — Steel screwed boss flanges
- Table 2500/5 — Steel slip-on boss flanges for welding
- Table 2500/8 — Steel plate blank flanges
- Table 4000/1A— Integral steel flanges
- Table 4000/1B— Integral iron flanges
- Table 4000/2— Steel welding neck flanges
- Table 4000/3— Steel plate flanges for welding
- Table 4000/4— Steel screwed boss flanges
- Table 4000/5— Steel slip-on boss flanges for welding
- Table 4000/8— Steel plate blank flanges
- Tolerances
Have You Any Question?
What to do if Mixed Materials are found in the project?
When materials get mixed up, it’s like building a Lego set with wrong pieces eventually everything falls apart.
The only viable solution requires 100% PMI testing on every individual flange using calibrated XRF analyzers, eliminating material certification risks through a certified processes.
Every factory out there claims they check their flanges with those XRF guns Piece by Piece. In all of Tsingshan Group’s backyard, only 3 manufacturers actually full-test every piece. We’re one of them.
Why Small Foundries happen the mix-ups?
These monster forging machines won’t start unless you order over 15 tons , like buying 100 pens when you need 10 . Factories have to mash together different steel batches.
Keeping materials separate costs small foundries 28% extra, like trying to sort Legos with a toddler wrecking them daily.
6/10 suppliers can’t track materials properly, it’s shipping mystery boxes that’ll bite us when things go wrong.
What is the standard lead time for orders? How do you handle delays caused by emergencies (e.g., pandemics, logistics disruptions)?
The standard lead time is 1 week, adjusted based on product complexity and order volume.
For unexpected risks, we implement the following measures:
—-Maintain backup suppliers and diversified logistics channels.
—-Monitor supply chain status in real time and provide early warnings to customers.
—-Prioritize critical orders and offer expedited service options.
What specific quality control steps are implemented during production?
Three-tier QC system:
—-Incoming Quality Control (IQC): Verify raw material specifications and certifications.
—-In-Process Quality Control (IPQC): Sample-test key parameters at each production stage.
—-Outgoing Quality Control (OQC): 100% visual/functional inspection, packaging checks, and destructive testing on samples.
—-Use SPC (Statistical Process Control) and automated inspection tools to ensure consistency.
How do you continuously improve product quality and on-time delivery rates?
Data-driven approach: Monthly analysis of customer complaints, return rates, and delivery performance.
PDCA Cycle (Plan-Do-Check-Act): Implement process upgrades or supplier training based on findings.
Closed-loop feedback: Regularly survey customer satisfaction and integrate results into KPI evaluations.
Intended Use: Suitable for supplier manuals, contract annexes, official websites, or sales communication to enhance client trust and reduce collaboration friction.