RFQ Today
Certifications available: EN 10204 3.1 / 3.2 MTRs, ISO 3506 SS grades, Third-Party Inspection, ISO 15977–15983 / DIN 7337 standards, and complete EPC export documentation packages.
Blind Rivets
A world-class technical reference for EPC contractors, mechanical and structural engineers, procurement heads, TPI inspection agencies, and global project buyers specifying blind rivets in sheet metal fabrication, enclosures, cable management, cladding, HVAC, modular construction, and industrial assembly across Oil & Gas, Power Generation, Petrochemical, Offshore, Infrastructure, and Manufacturing sectors.
Type Classification
& Setting Mechanics
Blind rivets — also termed pop rivets or break-stem rivets — are two-piece fasteners comprising a hollow rivet body and a headed mandrel. Inserted through a pre-drilled hole from one side, they are set by a rivet tool pulling the mandrel through the body, expanding the blind end against the reverse face of the joint, then snapping the mandrel flush at a pre-defined break load. The entire operation requires access from one side only — the defining functional advantage over through-bolting and solid rivets.
1.1 — Technical Definition and Functional Role
A blind rivet consists of two precision components: (1) the rivet body — a hollow cylindrical tube with a preformed head (dome, countersunk, or large flange) at one end; and (2) the mandrel — a headed solid pin through the hollow body. During installation, the rivet tool grips the mandrel and applies a controlled pull force. The mandrel head bears against the body tail, causing the body to expand radially and form a blind head against the back face of the substrate. When the clamp load is achieved, the mandrel breaks at a pre-defined notch, leaving the set rivet body in place.
In EPC and industrial construction, blind rivets are the primary fastener in: electrical enclosures and marshalling cabinet sheet metal assembly, cable tray and cable ladder panel attachment, HVAC ductwork, instrument shelter cladding, signage and identification plate attachment, modular building panel joints, equipment access door hinges, insulation cladding band joints, aluminium composite panel (ACP) assembly, and any sheet metal or thin-substrate application where only one face of the joint is accessible.
RR Hydraulic supplies blind rivets under all applicable international standards with full EN 10204 3.1 / 3.2 material traceability and project documentation.
1.2 — Blind Rivet Type Classification
Open-End (Standard) Blind Rivet
The most widely used type globally. After setting, the mandrel breaks flush with the dome head and the hollow body tail remains open. Per ISO 15977–15983 / DIN 7337. Standard for general enclosure, panel, and sheet metal assembly. Not waterproof — the open mandrel hole allows liquid ingress. Specified where weatherproofing of the rivet hole is not required.
Sealed (Closed-End) Blind Rivet
Pre-formed closed end — remains sealed after mandrel break. Provides a weather-tight and fluid-tight seal at the rivet location without a separate sealing washer. Used in cladding, HVAC, outdoor enclosures, pipe insulation jacketing, and any application where weather or fluid ingress through the rivet hole must be prevented. Essential for roofing and external wall panel assembly in marine and coastal environments.
Structural Blind Rivet (Locked Mandrel)
High-strength two-piece rivet with retained (locked) mandrel inside the set body — providing higher shear and tensile capacity than standard open-end rivets. Per ISO 14589 / EN ISO 15977 structural designation. Used in structural cladding connections, equipment support brackets, cable tray structural joints, and secondary steel connections where defined structural loads must be transferred. Grip range spans multiple material thickness combinations.
Large Flange (Dome Head) Blind Rivet
Standard dome head with oversized flange diameter — typically 1.5–2× the standard OD for the same nominal rivet diameter. The large flange prevents pull-through in thin or soft materials (aluminium sheeting ≤ 0.8 mm, GRP panels, foam-core sandwich panels). Per DIN 7337 large flange variant. Standard for insulation cladding panel assembly and thin aluminium enclosure skins.
Countersunk (Flat Head) Blind Rivet
90° or 120° countersunk head for flush installation. Per ISO 15979 (90° CSK) and ISO 15981 (120° CSK). Used where a flush surface is required: equipment nameplate attachment, cable tray floor plates, ACP facade panel assembly, and inspection panel faces. Verify countersink angle matches rivet head angle before specifying — 90° and 120° are not interchangeable.
Peel-Type (Multi-Petal) Blind Rivet
The rivet body is pre-slotted longitudinally — petals peel outward symmetrically as the mandrel is pulled, creating a wide-diameter blind flange with very low insertion force. Designed for soft, brittle, or layered materials (GRP, fibre cement, plastic sheet, wood composites) where the wide-spreading petal flange distributes clamp load over the maximum possible area, preventing local crushing or pull-through. Used in EPC composite instrument shelter panels and insulation board applications.
1.3 — Blind Rivet vs Alternative Fasteners: Engineering Selection
| Parameter | Blind Rivet | Bolt + Nut | Self-Tapping Screw | Self-Drilling (TEK) | Engineering Implication |
|---|---|---|---|---|---|
| Access required | One side only | Both sides | One side | One side | Blind rivet: only option in enclosed sections |
| Installation speed | Fastest (1 tool pull) | Slow | Fast | Fastest | Blind rivet: highest assembly speed |
| Removability | Destructive drill-out | Fully reversible | Good | Destructive | Blind rivet: permanent joints only |
| Hole preparation | Drill only | Drill + tap | Drill (or none) | None required | Blind rivet: simplest hole prep |
| Vibration resistance | Good (set body locks) | Preload dependent | Moderate | Moderate | Blind rivet: immune to vibration loosening |
| Shear capacity | Moderate | High | Moderate | Moderate | Bolt preferred for high structural shear |
| Watertight option | Yes (sealed type) | No (without sealant) | Yes (EPDM washer) | Yes (EPDM washer) | Sealed blind rivet: inherently weatherproof |
| Substrate materials | Metal, composite, plastic | Metal (tapped) | Metal, plastic, wood | Metal only | Blind rivet: widest substrate range |
1.4 — Load Characteristics and Failure Modes
Setting Process and Clamp Load
The rivet tool pulls the mandrel at a controlled force — expanding the rivet body tail, developing clamp load, then snapping the mandrel at the break notch. Properly set rivets have a fully expanded, symmetric blind head. Under-set rivets (mandrel not fully pulled) have incomplete blind head formation and reduced clamp load — often invisible from the accessible face. Always verify tool calibration before production installation.
Mandrel Retention and FOC Risk
In standard open-end rivets, the broken mandrel segment remains loosely inside the set body. In vibrating assemblies this loose mandrel can rattle or be expelled. In electrical enclosures, a loose mandrel creates a foreign object contamination (FOC) risk for components. Sealed rivets and structural locked-mandrel rivets retain the mandrel positively — specify these types for control panels, electrical enclosures, and vibration-sensitive assemblies.
Grip Range and Blind Head Quality
Combined thickness of all materials being joined must fall within the rivet’s grip range. Below minimum grip: over-expansion causes body cracking; blind head may not form. Above maximum grip: insufficient mandrel travel; blind head undersized and clamp load inadequate. Always verify combined substrate thickness against the rivet grip range on the product data sheet before specification — this is the most common source of blind rivet installation failure in EPC site assembly.
Galvanic Corrosion at Rivet
Rivet body and mandrel materials must be compatible with each other and the substrate in the service environment. Standard aluminium body / carbon steel mandrel in marine atmosphere: the steel mandrel corrodes, expands due to corrosion product volume increase, and physically splits the aluminium body — destroying joint integrity. For coastal and offshore: full SS rivets (SS body + SS mandrel) are the minimum standard. Never specify Al body + plain steel mandrel for outdoor or marine-adjacent service.
Drill Hole Size Accuracy
The hole must be 0.1–0.2 mm larger than the rivet nominal diameter. Too small: rivet body cannot be inserted. Too large: body has excessive clearance, sets asymmetrically, and develops lower than rated clamp load. Worn drill bits produce oversize holes — calibrate drill bit sizes regularly. Verify drill size against the manufacturer’s specification table for each rivet diameter; do not interpolate between sizes.
Pull-Through of Sheet (Head)
In thin sheet ≤ 0.8 mm, the rivet head can pull through under sustained tensile or vibration load if head bearing area is insufficient. Standard dome head provides minimum bearing area; large flange head and truss head provide maximum. For sheet ≤ 0.8 mm: specify large flange blind rivets. For composite or GRP panels: specify peel-type blind rivets which spread the clamp load over the maximum possible area.
1.5 — Rivet Load Capacity
F_u,body = UTS of rivet body material (MPa)
d = Rivet body nominal diameter (mm)
A_body = Cross-sectional area at shear plane (mm²)
0.6 = Shear-to-tensile ratio (von Mises, conservative for hollow section)
Bearing capacity check (EC3 Part 1-3):
F_bear = 2.1 × f_u,sheet × d × t (per sheet ply at rivet location)
f_u,sheet = UTS of sheet material; t = sheet thickness
Pull-through resistance:
F_pull = 0.5 × t × d_head × f_u,sheet
d_head = rivet head bearing diameter
Design resistance: F_Rd = F_Rk / γ_M2; γ_M2 = 1.25 per EC3 Part 1-3
A_body = π × 4.8² / 4 × 0.65 (hollow factor) = 11.8 mm²
F_u,body (Al 5052) = 228 MPa → F_shear,Rk = 0.6 × 228 × 11.8 = 1,614 N
Bearing: F_bear,Rk = 2.1 × 330 × 4.8 × 1.5 = 4,989 N — rivet shear governs.
F_Rd = 1,614 / 1.25 = 1,291 N = 1.29 kN design capacity per rivet
Submit your BOM, rivet type, diameter, grip range, body/mandrel material, and quantity for a documented RFQ within 24 hours.
Grip Range &
Standards Compliance
Blind rivet dimensions — nominal diameter, head diameter, head height, grip range, and mandrel break force — are governed by ISO 15977–15983, DIN 7337, and ASME B18.16M. Correct rivet diameter and grip range selection relative to the combined substrate thickness is the primary engineering decision. All applicable standards are supported with full certification at RR Hydraulic.
Submit rivet type, diameter, grip, body/mandrel combination, and quantity to sales@rrhydraulics.com for a fully certified offer.
2.1 — ISO 15977 Open-End Dome Head Blind Rivet Dimensional Table
| Designation | Body Dia d (mm) | Head Dia (mm) | Head Ht (mm) | Drill Hole (mm) | Min Grip (mm) | Max Grip (mm) | Min Break Force (N) | Max Break Force (N) |
|---|---|---|---|---|---|---|---|---|
| Ø2.4 × 6 | 2.4 | 4.8 | 1.2 | 2.5–2.6 | 0.5 | 3.0 | 250 | 520 |
| Ø2.4 × 8 | 2.4 | 4.8 | 1.2 | 2.5–2.6 | 3.0 | 5.0 | 250 | 520 |
| Ø3.2 × 6 | 3.2 | 6.4 | 1.6 | 3.3–3.4 | 0.5 | 3.0 | 440 | 890 |
| Ø3.2 × 8 | 3.2 | 6.4 | 1.6 | 3.3–3.4 | 3.0 | 4.8 | 440 | 890 |
| Ø3.2 × 10 | 3.2 | 6.4 | 1.6 | 3.3–3.4 | 4.8 | 6.4 | 440 | 890 |
| Ø4.0 × 8 | 4.0 | 8.0 | 2.0 | 4.1–4.2 | 0.5 | 4.0 | 650 | 1300 |
| Ø4.0 × 10 | 4.0 | 8.0 | 2.0 | 4.1–4.2 | 4.0 | 6.0 | 650 | 1300 |
| Ø4.0 × 12 | 4.0 | 8.0 | 2.0 | 4.1–4.2 | 6.0 | 8.0 | 650 | 1300 |
| Ø4.8 × 8 | 4.8 | 9.5 | 2.4 | 4.9–5.0 | 0.5 | 3.2 | 1000 | 2000 |
| Ø4.8 × 10 | 4.8 | 9.5 | 2.4 | 4.9–5.0 | 3.2 | 6.4 | 1000 | 2000 |
| Ø4.8 × 14 | 4.8 | 9.5 | 2.4 | 4.9–5.0 | 6.4 | 9.5 | 1000 | 2000 |
| Ø6.4 × 12 | 6.4 | 12.7 | 3.2 | 6.5–6.6 | 0.5 | 4.8 | 1700 | 3400 |
| Ø6.4 × 16 | 6.4 | 12.7 | 3.2 | 6.5–6.6 | 4.8 | 9.5 | 1700 | 3400 |
| Ø6.4 × 20 | 6.4 | 12.7 | 3.2 | 6.5–6.6 | 9.5 | 14.3 | 1700 | 3400 |
2.2 — ISO 14589 Structural Blind Rivet Load Reference
| Body Dia (mm) | Body / Mandrel | Min Shear (kN) | Min Tensile (kN) | Grip Range (mm) | Drill Hole (mm) | Standard |
|---|---|---|---|---|---|---|
| 3.2 | Steel / Steel | 1.4 | 0.9 | 0.5–4.8 | 3.3–3.4 | ISO 14589 |
| 4.0 | Steel / Steel | 2.3 | 1.6 | 0.5–6.0 | 4.1–4.2 | ISO 14589 |
| 4.8 | Steel / Steel | 3.5 | 2.4 | 0.5–9.5 | 4.9–5.0 | ISO 14589 |
| 4.8 | SS 304 / SS 304 | 3.0 | 2.1 | 0.5–9.5 | 4.9–5.0 | ISO 14589 |
| 4.8 | Al / SS 304 mandrel | 1.8 | 1.2 | 0.5–9.5 | 4.9–5.0 | ISO 14589 |
| 6.4 | Steel / Steel | 6.2 | 4.4 | 0.5–14.3 | 6.5–6.6 | ISO 14589 |
| 6.4 | SS 316 / SS 316 | 5.5 | 3.9 | 0.5–14.3 | 6.5–6.6 | ISO 14589 |
| 6.4 | Al / SS mandrel | 3.2 | 2.3 | 0.5–14.3 | 6.5–6.6 | ISO 14589 |
2.3 — Body / Mandrel Material Combination Reference
| Body | Mandrel | ISO Std | DIN 7337 | Strength | Corrosion | Galvanic Risk | EPC Application |
|---|---|---|---|---|---|---|---|
| Aluminium 5052 | Carbon Steel | ISO 15978 | Part 2 | Low | Moderate | Moderate | General indoor panels, enclosures |
| Aluminium 5052 | Aluminium | ISO 15977 | Part 1 | Lowest | Good | None | Al enclosures, ACP panels, food/pharma |
| Aluminium 5052 | SS 304 | ISO 15978 SS stem | — | Low–Mod | Very Good | Low | Coastal enclosures, outdoor Al panels |
| Steel (carbon) | Carbon Steel | ISO 15979/80 | Part 3 | High | Low (coat) | None | Steel enclosures, cable tray, structural |
| Steel Geomet | Steel Geomet | ISO 15979 + coat | Part 3 | High | Good | None | Outdoor EPC, coastal structural cladding |
| SS 304 (A2) | SS 304 | ISO 15982 | Part 4 | Moderate | Very Good | None | Food/pharma, chemical, indoor SS panels |
| SS 316 (A4) | SS 316 | ISO 15982 (A4) | Part 4 A4 | Moderate | Excellent | None | Marine, offshore, coastal, NACE service |
2.4 — Applicable Standards and Compliance Framework
ISO 15977–15983
The primary ISO series for blind rivets covering all standard head type and body/mandrel material combinations. ISO 15977: Al/Al; ISO 15978: Al/Steel; ISO 15979: Steel/Steel (dome); ISO 15980: Steel/Steel (CSK); ISO 15981: Al/Al (CSK); ISO 15982: SS/SS; ISO 15983: SS/Steel. Each part specifies dimensions, mechanical properties, and performance testing for that specific combination. Mandatory reference for all ISO-coded EPC project blind rivet specification.
ISO 14589
Blind rivets — mechanical interlock type (structural). The governing standard for structural blind rivets with locked mandrel. Defines minimum shear and tensile load requirements, mandrel retention force, and grip range performance testing. Provides design data for structural connection design per Eurocode 3 Part 1-3 where blind rivets are used as structural fasteners in cold-formed steel secondary connections and cladding systems.
DIN 7337
The German standard for blind rivets — Part 1 (Al/Al), Part 2 (Al/Steel), Part 3 (Steel/Steel), Part 4 (SS/SS). Still widely specified in German EPC equipment, plant, and enclosure fabrication documentation. The “D×L” designation format (e.g., 4.8×12 = 4.8 mm diameter, 12 mm length) is the DIN 7337 convention. Dimensionally aligned with the ISO 15977–15983 series for equivalent sizes.
ISO 3269
Fasteners — acceptance inspection. Specifies the sampling plan (AQL 1.0 or AQL 2.5) and inspection lot procedures for dimensional and functional testing of blind rivets. Defines lot acceptance criteria, sample size (minimum 5), and rejection criteria. Used to structure the production QC and incoming inspection sampling programme for EPC project blind rivet supply.
ASME B18.16M
Metric blind rivets — the North American standard for metric blind rivet dimensional and material requirements. Defines dome, countersunk, and large flange head types in Al, steel, and SS body/mandrel combinations. Used alongside ISO 15977 series for dual-standard project compliance documentation on US-coded EPC projects and North American industrial equipment specifications.
Eurocode 3 Part 1-3
Design of steel structures — cold-formed members and sheeting, Section 8: fasteners. Structural design method for blind rivet connections in cold-formed steel. Defines bearing, net-section tension, pull-through, and combined loading resistance per ISO 14589 structural rivet characteristic values. Safety factor γ_M2 = 1.25. Applies to cable tray structural connections, cladding attachment, and secondary steel connections using structural blind rivets.
ISO 3506 (SS Grades)
Mechanical properties of corrosion-resistant SS fasteners. A2-70 (SS 304) and A4-70/A4-80 (SS 316) body and mandrel material designation for SS blind rivets per ISO 15982. A4-70 (SS 316) is the minimum grade for coastal and offshore service. Both body and mandrel must be SS for marine service — Al body with SS mandrel is not acceptable for offshore continuous marine atmosphere; mandrel corrosion physically damages the aluminium body over time.
EN 1090
Execution of steel and aluminium structures. For structural secondary connections using blind rivets, EN 1090-2 (steel) requires CE-marked fastener products with a Declaration of Performance (DoP) declaring characteristic shear and tensile values. For EPC structural cladding and cable tray secondary connections, the blind rivet product must have documented performance data per ISO 14589 referenced in the DoP for EN 1090 compliance.
Coatings &
Manufacturing Process
Blind rivet body and mandrel material selection is driven by corrosion environment and structural load. RR Hydraulic manufactures blind rivets in all standard and high-performance combinations — aluminium, steel, SS 304, SS 316, and copper — with full EN 10204 material traceability and ISO 3506 certification for SS grades.
3.1 — Body Material Overview and Properties
| Body Material | Alloy | UTS (MPa) | Shear Str. (MPa) | Temp Range (°C) | Bare Corrosion | Density (g/cm³) | EPC Application |
|---|---|---|---|---|---|---|---|
| Aluminium | 5052 / 5056 | 215–290 | 130–170 | −200 to +120 | Good (oxide) | 2.7 | Enclosures, ACP, ductwork, lightweight |
| Carbon Steel | SAE 1010 | 320–410 | 190–245 | −20 to +300 | Poor (coat req.) | 7.85 | Steel enclosures, cable tray, structural |
| SS 304 (A2) | AISI 304 | 515–690 | 310–415 | −196 to +300 | Very Good | 7.93 | Chemical, food/pharma, mild marine |
| SS 316 (A4) | AISI 316 | 515–690 | 310–415 | −196 to +300 | Excellent | 7.98 | Marine, offshore, coastal, NACE service |
| Monel 400 | UNS N04400 | 480–550 | 290–330 | −200 to +400 | Excellent (seawater) | 8.84 | Extreme marine; seawater immersed |
| Copper | C11000 ETP | 200–340 | 120–205 | −200 to +200 | Good (patina) | 8.96 | Electrical bus bar; non-magnetic; decorative |
3.2 — Corrosion Resistance Matrix
| Body Material | Indoor Dry | Outdoor Inland | Coastal (<1 km) | Marine / Offshore | Chemical | CCA Timber | Recommended Mandrel |
|---|---|---|---|---|---|---|---|
| Al 5052 (bare) | Excellent | Very Good | Good | Fair | Fair | Poor | Al or SS 304 mandrel |
| Steel (zinc-plated) | Very Good | Good | Fair | Poor | Poor | No | Zinc-plated steel mandrel |
| Steel (Geomet) | Excellent | Very Good | Good | Fair | Fair | Good | Geomet steel mandrel |
| SS 304 (A2) | Excellent | Excellent | Good | Fair (pitting) | Good | Excellent | SS 304 mandrel only |
| SS 316 (A4) | Excellent | Excellent | Excellent | Very Good | Very Good | Excellent | SS 316 mandrel only |
| Monel 400 | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | Monel or SS mandrel |
3.3 — Surface Finish Options
| Finish | Spec | Thickness (µm) | Salt Spray (h) | Setting Impact | CCA Timber? | Application |
|---|---|---|---|---|---|---|
| Plain / Bright | As-formed | — | <24 | None | No | Indoor dry assembly only |
| Zinc Electroplate | ASTM B633 / ISO 4042 | 5–12 | 96–200 | None | No | Indoor EPC enclosures |
| Yellow Zinc Chromate | ASTM B633 Type III | 5–12 + Cr | 200–500 | None | No | Standard outdoor EPC steel rivets |
| Geomet | ISO 10683 | 8–10 | 1000 | Minimal | Yes | Coastal industrial; treated timber adjacent |
| HDG | ASTM A153 | 25–50 | 1000+ | Verify hole — thicker coat may need larger drill | Yes ≥25µm | Outdoor structural; treated timber |
| Passivation (SS) | ASTM A967 | Passive layer | 2000+ | None | Excellent | All SS rivets — standard finish |
3.4 — Manufacturing Process
3.4.1 — Rivet Body Cold Heading
Blind rivet bodies are cold-headed from wire stock (aluminium, steel, or SS) in a multi-station progressive die. The head is formed simultaneously with the hollow body — the precise head geometry (dome radius, flange diameter) is set in the final die stage. The hollow bore is produced by a piercing mandrel in the tooling. Closed-end (sealed) rivet bodies retain the closed geometry from the heading process without a secondary operation. Dimensional consistency of the bore diameter is critical — variations prevent mandrel pass-through or allow premature pull-through during setting.
3.4.2 — Mandrel Manufacture and Break Notch
- Cold drawing: Mandrel wire drawn to precise diameter — oversize mandrel will not pass through the rivet body bore; undersize pulls through without setting the body
- Head formation: Mandrel head cold-formed by upsetting — head diameter and underhead geometry determine blind head expansion diameter and mandrel break load range
- Break notch grinding: Precision circumferential groove machined at the mandrel break point — notch depth determines break load range (min/max per ISO 15977 table); shallow notch = high break load; deep notch = low break load
- Surface treatment: Zinc plate, Geomet, or passivation per body specification; mandrel coating matched to body coating to prevent galvanic coupling
- Assembly: Mandrel assembled into rivet body with controlled insertion depth — mandrel head must be fully engaged with the body bore; insufficient engagement allows pre-mature pull-out before body sets
Industry Applications
& Documentation
RR Hydraulic maintains full traceability from raw wire stock to final packed shipment on all blind rivet orders. Dimensional inspection, mandrel break load test certificates, setting performance reports, EN 10204 MTRs, and complete EPC export documentation packages are standard on all project-grade supply.
4.1 — Inspection & QC Protocol
4.2 — EN 10204 Material Test Certificate Requirements
| Certificate | Content | Signatory | EPC Requirement | When Mandatory |
|---|---|---|---|---|
| 2.1 | Conformity declaration only | Manufacturer | Non-critical commercial supply | General hardware procurement only |
| 2.2 | Non-specific test results | Manufacturer | Standard EPC enclosure / panel | General EPC blind rivet supply |
| 3.1 | Wire lot traceable mech + chem | Manufacturer’s authorised QC | Structural ISO 14589, SS marine, offshore | All structural locked-mandrel, SS A4-70/A4-80, offshore |
| 3.2 | 3.1 + TPI countersign | Manufacturer + SGS / BV / Lloyds | Critical offshore, nuclear secondary | Offshore structural cladding; nuclear Class 2/3 |
4.3 — Applications by Industry
Electrical Enclosures & Marshalling Cabinets
Ø3.2–Ø4.8 mm aluminium-body / SS-mandrel or full SS blind rivets for DCS/PLC enclosures, marshalling cabinets, and junction box panel assembly. Sealed rivet type specified for all external-face enclosure assembly — prevents condensation ingress through open mandrel holes. Locked-mandrel structural rivets for cable tray internal panel bracket attachment. SS A4-70 for offshore and coastal facilities. EN 10204 2.2 standard; 3.1 for O&G offshore EPC.
Cable Tray & Cable Ladder Assembly
Ø4.8–Ø6.4 mm steel (Geomet or zinc-plated) or SS structural blind rivets for cable tray joint plates, end caps, and bracket connections. Locked-mandrel ISO 14589 structural rivets for load-bearing cable tray splice connections where shear load from cable weight must be transferred. SS A4-70 full-SS rivets for offshore and marine cable management. Minimum 2 rivets per connection per structural drawings; edge distance 3×d minimum.
Offshore Platform Topside Cladding
All blind rivets on offshore topsides: full SS 316 (A4) — both body and mandrel SS 316. Carbon steel or mixed Al/steel mandrel rivets are unacceptable in continuous marine chloride atmosphere — galvanic corrosion and mandrel expansion will split aluminium bodies within 2–3 years. Sealed SS rivet type for all weatherproof cladding. EN 10204 3.1 minimum; 3.2 with Lloyds or DNV TPI for structural cladding connections. PMI on every SS lot mandatory.
Modular Buildings & EPC Skids
Ø4.0–Ø6.4 mm steel Geomet or SS blind rivets for steel-framed modular instrument shelters, control rooms, substations, and accommodation units. Sealed type for all external faces and roof/wall panel joints. Structural locked-mandrel rivets (ISO 14589) for structural panel-to-frame connection where wind load must be transferred. CCA/ACQ treated timber framing in modular buildings: SS A4-70 rivets only — zinc-plated or plain steel are not acceptable adjacent to treated timber preservatives.
HVAC Ductwork & Air Handling
Ø3.2–Ø4.8 mm aluminium or steel blind rivets for ductwork panel joints, air handling unit access doors, and HVAC enclosure assembly. Open-end rivets standard for internal dry ductwork; sealed rivets for external duct runs subject to condensation or weather exposure. Locked-mandrel structural rivets for AHU support bracket attachment. Anti-rotation feature important in ductwork — aluminium body with serrated mandrel head provides bite resistance to joint vibration.
Food & Pharmaceutical Enclosures
Full SS 316 (A4) sealed blind rivets with smooth dome heads for process-zone equipment panels and enclosures. Sealed type mandatory — no open mandrel hole that could harbour bacteria or product residue. Smooth dome head with no recess or crevice at the head-to-panel interface. PTFE-coated SS rivets for aggressive CIP cleaning cycle resistance. PMI on all SS lots. EN 10204 3.1 with composition confirming SS 316 (not 304) per EU 10/2011 / FDA 21 CFR traceability.
4.4 — Export Packaging Specification
- Blind rivets bulk-packed in polybags per diameter, length, body/mandrel material combination, head type, and coating — prevents mixing of similar-appearance different-grade rivets on site
- VCI (Volatile Corrosion Inhibitor) poly bag packaging for all plain and zinc-plated carbon steel rivets — prevents red rust on body and mandrel surfaces during ocean freight and site storage
- SS rivets: packed separately from carbon steel hardware — iron contamination on SS surfaces causes corrosion spots; each SS polybag clearly labelled with grade (A2-70 / A4-70 / A4-80)
- Lot tagging: each polybag labelled with rivet designation (body dia × length), head type, body material, mandrel material, coating, ISO / DIN standard reference, grip range, heat/lot number, quantity, and PO item reference
- BOM kit packaging: multi-compartment trays for EPC enclosure and panel assembly kits — each compartment labelled with rivet specification; eliminates mis-picking errors in large kit deliveries to remote site locations
- ISPM-15 heat-treated timber crates for all international export; inner cartons per UN packaging requirements for coated fastener commodity classification
- Documentation: packing list, EN 10204 MTC, mandrel break load certificate, setting performance report, coating certificate, and FAI report enclosed with each lot — cross-referenced to polybag lot number
4.5 — Complete EPC Project Documentation Package
| # | Document | Standard / Format | Mandatory / Conditional | Notes |
|---|---|---|---|---|
| 01 | Material Test Certificate (MTC) — Body | EN 10204 2.2 / 3.1 / 3.2 | Mandatory | Wire stock lot traceable — body material |
| 02 | Material Test Certificate (MTC) — Mandrel | EN 10204 2.2 / 3.1 / 3.2 | Mandatory — 3.1 orders | Separate MTC for mandrel wire stock |
| 03 | Chemical Composition Report | Wire lot certified lab analysis | Mandatory — 3.1 / 3.2 orders | Per ISO 15977 / ISO 3506 chemistry limits |
| 04 | Mechanical Properties Report | UTS, shear strength per lot | Mandatory — 3.1 / 3.2 orders | Body + mandrel — both reported |
| 05 | Dimensional Inspection Report | Per ISO 15977–15983 / DIN 7337 | Mandatory | Body dia, head, bore, length, mandrel protrusion |
| 06 | Mandrel Break Load Test Report | ISO 15977 break force table | Mandatory — all blind rivet supply | Min + max break force confirmed per ISO table |
| 07 | Setting Performance Report | ISO 15977 functional test | Mandatory | Set at min and max grip; blind head quality |
| 08 | Shear Load Test Report | ISO 14589 characteristic shear | Mandatory — structural ISO 14589 supply | Failure load vs min characteristic value |
| 09 | Tensile / Pull-Out Test Report | ISO 14589 characteristic tensile | Mandatory — structural supply | Failure load vs min characteristic tensile |
| 10 | Surface Finish / Coating Certificate | ISO 4042 / ISO 10683 / ASTM B633 | Mandatory — all coated supply | Thickness + salt spray hours per lot |
| 11 | PMI Report (XRF) | Per lot — SS and Monel grades | Mandatory — SS and exotic grades | A4-70 vs A2-70 body and mandrel separately |
| 12 | First Article Inspection (FAI) Report | Project-specific format | Mandatory — new configs / first lots | Released before batch production |
| 13 | TPI Witness Certificate | SGS / BV / DNV / Lloyds | Conditional — EN 10204 3.2 / offshore | Co-witness at manufacturer works |
| 14 | ISO 9001:2015 Certificate | Third-party QMS certification | Mandatory — EPC projects | Scope covers blind rivet manufacture |
| 15 | Country of Origin Certificate | Chamber of Commerce | Mandatory — all export | HS tariff code for customs |
| 16 | Packing List | Item-level per shipment | Mandatory | Cross-references lot numbers and MTC |
| 17 | Commercial Invoice | Per INCOTERMS 2020 | Mandatory | Includes HS tariff code |
| 18 | Bill of Lading / Air Waybill | Per freight mode | Mandatory | Issued by freight forwarder |
4.6 — ISO and Quality System Compliance
ISO 9001:2015
Quality Management System covering wire stock procurement for both body and mandrel, cold heading process control, break notch grinding dimensional verification, mandrel assembly depth control, mandrel break load testing, setting performance testing, coating process QC, and full lot traceability. Mandatory for all EPC, O&G, and structural project procurement qualification. RR Hydraulic holds current ISO 9001:2015 certification covering blind rivet manufacture.
Eurocode 3 Part 1-3
Design of steel structures — cold-formed members and sheeting, Section 8: fasteners. The structural design basis for all blind rivet shear, pull-through, bearing, and combined loading resistance calculations in EPC secondary steel connections. Defines characteristic resistance formulas and γ_M2 = 1.25 safety factors. Used by structural engineers for cable tray, cladding, and secondary frame connection design using ISO 14589 structural blind rivets.
ISO 10474
Steel and steel products — inspection documents. Source framework for EN 10204 certificate types. Some EPC project specifications reference ISO 10474 Type 2.2 or 3.1.B for blind rivet supply — these map to EN 10204 2.2 and 3.1 respectively. RR Hydraulic provides documentation in either format and cross-maps certificate types for legacy specification compliance on request.
ISO 4413
Safety requirements for hydraulic fluid power systems. Blind rivets used in HPU enclosure panels and hydraulic system control cabinet fabrication must meet ISO 4413 cleanliness and contamination-prevention requirements. Sealed SS blind rivets specified for HPU enclosures — no open mandrel holes that could allow hydraulic fluid spray to corrode the broken mandrel stump and generate metallic contamination particles in the hydraulic system environment.
Submit your BOM, rivet type, diameter, grip, body/mandrel material, coating, and quantity to RR Hydraulic for a complete, certified commercial offer.