Classification Societies Compared: DNV, ABS and LR for Marine Couplings
How DNV, ABS and LR Type Approval works for marine pipe couplings, and which certificates a coupling actually needs to hold before quoting classed vessel work.
yongxiang@davidphee.com
API 5L, 6A and 1104: Pipeline Standards Every Coupling Buyer Should Know
What API 5L, 6A and 1104 actually govern, and the one place mechanical couplings still fit a welded pipeline world — emergency repair clamps.
Singapore Standards for Pipework: What SS 636 Actually Covers
SS 636 is Singapore’s real pipework and water-services code. Here’s what it covers, two commonly-confused SS numbers to avoid, and the full SG code map.
Coupling Bolt Materials: ASTM A193, A194 and A536 Explained
What ASTM A536 ductile iron and A193/A194 bolting grades actually specify, and why the coating matters as much as the grade for coastal Singapore service.
AWWA C219 vs C606: Which Coupling Standard Applies to Your Project
AWWA C219 covers bolted sleeve-type couplings on plain-end pipe; C606 covers grooved joints. Here’s which one names your product and which is a no-play.
NFPA 13 and SCDF: Grooved Couplings for Fire Sprinkler Systems
How NFPA 13, SCDF Fire Code 2023, and the UL 213 / FM 1920 listing regime decide which couplings can go on a Singapore sprinkler riser.
PUB Requirements for Pipe Couplings in Singapore Water Networks
A technical breakdown of PUB pipe coupling requirements — the ASTM F1476, SS 375, and AS/NZS 4020 test stack, S&R tables, and COPSSW rules explained.
Six Months of Publishing: What We Learned Building a Pipe Coupling Resource From Zero
Pipe coupling SEO case study: what worked and what didn’t in six months of technical publishing for a Singapore industrial supplier.
Building Services Retrofit: Replacing Couplings in Occupied Buildings
How to plan a building services pipe coupling retrofit in an occupied Singapore building — system selection, access windows, and certification limits.
MEP Contractor Procurement: How Singapore Contractors Buy Pipe Couplings
How MEP contractors buy pipe couplings in Singapore — main contractor vs M&E sub-contractor procurement, PrefabMEP, and the standards that gate specs.