Acids, alkalis, chemical drains, ETP

PP-H Single Layer Chemical Piping

One material all the way through. Polypropylene homopolymer produced as a single homogeneous wall, with no liner to lift, no reinforcement layer to separate and no bond line for an acid to find.

Anjney offers electrofusion jointing on PP-H up to 630 mm. We do not supply PP-H on butt fusion.

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20–630 mmPipe range

PN 10, 16, 20Pressure classes

EN ISO 15494Chemical-service standard

Two systemsSocket fusion and electrofusion

Built for chemical duty

Homopolymer is the stiffest and most chemically resistant member of the polypropylene family. What the fluid touches on day one is the same material through the full wall, and the same material the welder fuses.

Resistant where metal is not
Inert to acids, alkalis, salts and brine at concentrations that pit and scale stainless and mild steel.
Stiffer than PP-R
The highest flexural modulus and tensile strength in the PP family, so the line holds between supports.
Non-shedding bore
A smooth surface that does not corrode, scale or add metal ions to the stream. Right for dosing and transfer.
Light and fast to install
About a tenth of the weight of steel pipe of the same size. Lighter supports, smaller crews, shorter shutdowns.
Welded, not jointed
Every connection is a fusion weld. No gasket, thread or flange face to weep.
Low maintenance
No painting, re-lining or rescaling shutdowns, and no galvanic pair at dissimilar-metal transitions.

Why the joint matters most in chemical service

A butt-fusion bead is more than a pressure loss. It is a ledge for solids, scale and crystallising salts to build on, at every joint, for the life of the line. Electrofusion leaves nothing for them to hold on to.

Butt fusionMolten material is pushed into a ring inside the bore at every joint. It stays there for the life of the line.

Anjney electrofusion, 200 to 630 mmA coil moulded into the fitting fuses pipe and fitting inside the socket. The bore runs straight through.

Size	Jointing
20–200 mm	Socket fusion. Pipe and fitting heated on a mating tool and pushed home.
200–630 mm	Electrofusion. Machine-controlled cycle, parameters carried on the fitting, logged for audit on pharma and solar projects.

PP-H against the usual alternatives

Parameter	Anjney PP-H	SS / MS / GI	PVC / CPVC	HDPE
Corrosion	None	Pits and scales in acid, chloride and brine	None	None
Alkali resistance	Excellent	Poor to moderate	Moderate	Excellent
Stiffness	Highest in the PP family	Very high	High but brittle	Low, needs more supports
Impact behaviour	Tough, does not shatter	Ductile	Brittle, cracks on impact	Tough
Jointing	Socket fusion and electrofusion	Welded or threaded	Solvent cemented	Fusion welded
Weight	Light	Heavy	Light	Light
Maintenance	Near nil	Recurring	Low	Low

Chemical suitability depends on the medium, concentration, temperature and pressure acting together. PP-H resists all major acidic and basic media within specified concentrations; pure solvents are excluded. Confirm your service conditions with us before specifying.

Where PP-H is used

Specified where the medium is aggressive, the duty is continuous, and replacing the line means stopping production. It is a chemical-service pipe, not a general water-utility pipe.

Chemical processing and intermediates

Acid and alkali transfer, dosing, reactor feed and discharge, scrubbers, tank-farm manifolds.

HCl, H₂SO₄, NaOH, KOH, NaOCl, brine

Solar PV manufacturing

Wafer cleaning, cell-line texturing and etching feed and drain, post-etch rinse, module wash circuits.

HF, HNO₃, KOH and NaOH texturing, H₃PO₄

Chlor-alkali and inorganics

Caustic and hypochlorite handling, brine circuits, cell-room headers, acid dilution.

Caustic soda, hypochlorite, brine, dilute acids

Steel pickling and acid regeneration

Pickling line headers, rinse cascades, spent-acid transfer, fume scrubbers.

HCl pickling liquor, spent acid, rinse

Metal finishing, plating and anodising

Tank lines, plating bath circulation, chromating and phosphating circuits.

Plating baths, chromic and phosphoric acid

Pharmaceutical and API

Reagent transfer, chemical dosing, neutralisation lines, corrosive drains from API blocks and QC labs.

Reagent acids, caustic, corrosive drains

Paper and pulp bleaching

Bleach plant lines and the chlorine dioxide and peroxide duties that attack stainless steel.

ClO₂, H₂O₂, caustic, bleach liquor

Dyes, pigments and textile chemicals

Dye liquor transfer, scouring and bleaching, caustic recovery and mercerising.

Dye liquor, caustic, hypochlorite, peroxide

Fertiliser and agrochemicals

Acid and ammonia handling, phosphoric and sulphuric acid circuits, slurry and dosing.

H₃PO₄, H₂SO₄, ammoniacal liquor

Effluent, ETP and ZLD

Segregated acidic and alkaline effluent headers, neutralisation, dosing, MEE and ZLD concentrate transfer.

Mixed acid effluent, fluoride-bearing streams

Chemical and laboratory drainage

Corrosive process drains, lab waste, trench and floor drains, vent stacks, below-ground collection.

Lab waste, acid drains, vents

Mining and mineral processing

Leaching circuits, solvent extraction and electrowinning, acid dosing, raffinate lines.

H₂SO₄, raffinate, leach liquor

Also specified in battery and electronics manufacturing, semiconductor support chemistry, tannery effluent, galvanising, pilot plants, acid filling stations and chemical tank farms.

Product range

Item	Range
PP-H pipe, single wall	20–630 mm, PN 10, 16, 20
Equal tee, coupler, elbow 90°	20–200 mm socket; 200–630 mm electrofusion
Reducing tee, reducer, end cap, elbow 45°	20–200 mm
Long radius elbow	20, 32, 50, 63 mm
Core flange / collar	20–200 mm
Branch adaptor	All relevant sizes
Step flange (backing ring)	20–630 mm
Electrofusion coupler, core flange, elbow, equal tee	200–630 mm

We provide fitter training, jointing procedure sheets and commissioning support. Send us the line schedule and layout and we size the network and mark up joint positions with you.

Grey PP-H chemical lines on a pipe rack — Chemical lines on a rack

PP-H lines running in a trench — Trench run

Downloads

Send us your line schedule

Tell us the service, pipe sizes and approximate run lengths. Our technical sales team sizes the network and returns a bill of material with an installed-cost comparison against your current specification.